Build a combo
Skip to main content
Sports·MLB

Cincinnati Reds – Arizona Diamondbacks

1d 2h
Polymarket
Reds
Reds
1:40 AMAugust 22
Diamondbacks
Diamondbacks
$98.79 Vol.Polymarket
NEW

Moneyline

$91 Vol.

Spreads

$8 Vol.

Totals

$0 Vol.

Will there be a run in the first inning?

$0 Vol.

Extra Innings

$0 Vol.

In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game. This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds is winning the game at the conclusion of the 5th inning. This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks is winning the game at the conclusion of the 5th inning. If the game is tied at the conclusion of the 5th inning, this market will resolve to "Draw". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game by 2 or more runs. Otherwise, this market will resolve to "Cincinnati Reds". If the game ends in a tie, this market will resolve to "Cincinnati Reds". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game by 3 or more runs. Otherwise, this market will resolve to "Cincinnati Reds". If the game ends in a tie, this market will resolve to "Cincinnati Reds". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game by 2 or more runs. Otherwise, this market will resolve to "Arizona Diamondbacks". If the game ends in a tie, this market will resolve to "Arizona Diamondbacks". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game by 3 or more runs. Otherwise, this market will resolve to "Arizona Diamondbacks". If the game ends in a tie, this market will resolve to "Arizona Diamondbacks". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 9 or more runs in this game. If the combined total is less than 9, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 8 or more runs in this game. If the combined total is less than 8, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 10 or more runs in this game. If the combined total is less than 10, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Yes" if at least one run is scored in the 1st inning by either the Cincinnati Reds or Arizona Diamondbacks. This market will resolve to "No" if no runs are scored in the 1st inning by either team. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds is winning the game by 2 or more runs at the conclusion of the 5th inning. Otherwise, this market will resolve to "Arizona Diamondbacks". If the game is tied at the conclusion of the 5th inning, this market will resolve to "Arizona Diamondbacks". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks is winning the game by 2 or more runs at the conclusion of the 5th inning. Otherwise, this market will resolve to "Cincinnati Reds". If the game is tied at the conclusion of the 5th inning, this market will resolve to "Cincinnati Reds". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 3 or more runs by the conclusion of the 5th inning. If the combined total is less than 3, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 4 or more runs by the conclusion of the 5th inning. If the combined total is less than 4, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 5 or more runs by the conclusion of the 5th inning. If the combined total is less than 5, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 6 or more runs by the conclusion of the 5th inning. If the combined total is less than 6, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 7 or more runs by the conclusion of the 5th inning. If the combined total is less than 7, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Yes" if the game goes to extra innings. This market will resolve to "No" if the game is completed without going to extra innings. For the purposes of this market, a game goes to extra innings if play begins in any inning after the scheduled regulation innings for that game, such as the 10th inning in a standard 9-inning MLB game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. If the game ends in a tie before extra innings are played, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.The Arizona Diamondbacks hold a clear edge entering their late-August home series against the Cincinnati Reds at Chase Field, thanks to a 67-61 record that places them in playoff contention in the NL West while the Reds sit at 61-67 near the bottom of the NL Central. Phoenix's extreme late-summer heat and the D-backs' stronger recent form and home splits shape trader expectations, especially with probable starters like Eduardo Rodriguez on the mound. The Reds' inconsistent offense and road performance add pressure in a matchup where historical series results and current standings reinforce the home side's advantages, though bullpen reliability and any late lineup tweaks could shift momentum.

In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40PM ET:

This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game.

This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game.

If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50.

The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.
Volume
$99
End Date
Aug 29, 2026
Market Opened
Aug 15, 2026, 9:00 AM ET

Resolution Source

https://www.mlb.com/

Resolver

0x65070BE91...
In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game. This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.

Beware of external links.

Frequently Asked Questions

The “Reds vs. Diamondbacks” market on Polymarket lets you trade on the outcome of the MLB game between the Cincinnati Reds and the Arizona Diamondbacks, scheduled for August 21, 2026 at 9:40 PM ET. The primary market is the moneyline — which team will win the game — where Diamondbacks is currently priced at 57¢ (57% implied probability) and Reds at 43¢ (43%). Beyond the moneyline, sports markets on Polymarket may feature spreads, totals (over/under), and player props, giving you multiple ways to trade on this game. Prices reflect real-time crowd-sourced probabilities. Shares in the correct outcome pay out $1 each when the market resolves after the game ends.

As of now, the “Reds vs. Diamondbacks” market has generated $99 in total trading volume across all market types (moneyline, spreads, totals, and player props). This volume reflects active engagement from the Polymarket trading community, and a deeper pool of traders generally means more informative, reliable odds. You can track live price movements and trade on any market directly on this page.

To trade on “Reds vs. Diamondbacks,” start by choosing the market type you want to trade: Moneyline (which team wins), Spreads (margin of victory), Totals (combined score over/under), or Player Props (individual player stat lines). Each market shows the current price for each side — for example, the moneyline shows CIN at 43¢ and ARI at 57¢. Select the side you want to trade, choose Buy to take a position or Sell to close an existing one, enter your amount, and click Trade. If your chosen side is correct when the game ends and the market resolves, your shares pay out $1 each. If it’s incorrect, they pay out $0. You can also sell your shares at any time before the game ends to lock in a profit or cut a loss.

The current moneyline odds for “Reds vs. Diamondbacks” show Arizona Diamondbacks at 57¢ (57% implied probability) and Cincinnati Reds at 43¢ (43%). All odds update in real-time as traders buy and sell shares, reflecting the latest collective view of how this game will play out. Check back frequently or bookmark this page to follow how the odds shift as game time approaches.

The “Reds vs. Diamondbacks” market resolves based on the official final score of the MLB game as reported by MLB’s official results, including overtime if applicable. Moneyline markets resolve to the team that wins the game. Spread markets resolve based on the final margin of victory relative to the posted line. Totals (over/under) markets resolve based on the combined final score of both teams. Player prop markets resolve based on official box score statistics. If the game is postponed or canceled, the market resolution rules (available in the Rules section on this page) specify how that scenario is handled. We recommend reviewing the full resolution criteria before trading.
Sports·MLB

Cincinnati Reds – Arizona Diamondbacks

1d 2h
Polymarket
Reds
Reds
1:40 AMAugust 22
Diamondbacks
Diamondbacks
$98.79 Vol.Polymarket
NEW

Moneyline

$91 Vol.

Spreads

$8 Vol.

Totals

$0 Vol.

Will there be a run in the first inning?

$0 Vol.

Extra Innings

$0 Vol.

In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game. This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds is winning the game at the conclusion of the 5th inning. This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks is winning the game at the conclusion of the 5th inning. If the game is tied at the conclusion of the 5th inning, this market will resolve to "Draw". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game by 2 or more runs. Otherwise, this market will resolve to "Cincinnati Reds". If the game ends in a tie, this market will resolve to "Cincinnati Reds". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game by 3 or more runs. Otherwise, this market will resolve to "Cincinnati Reds". If the game ends in a tie, this market will resolve to "Cincinnati Reds". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game by 2 or more runs. Otherwise, this market will resolve to "Arizona Diamondbacks". If the game ends in a tie, this market will resolve to "Arizona Diamondbacks". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game by 3 or more runs. Otherwise, this market will resolve to "Arizona Diamondbacks". If the game ends in a tie, this market will resolve to "Arizona Diamondbacks". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 9 or more runs in this game. If the combined total is less than 9, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 8 or more runs in this game. If the combined total is less than 8, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 10 or more runs in this game. If the combined total is less than 10, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Yes" if at least one run is scored in the 1st inning by either the Cincinnati Reds or Arizona Diamondbacks. This market will resolve to "No" if no runs are scored in the 1st inning by either team. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds is winning the game by 2 or more runs at the conclusion of the 5th inning. Otherwise, this market will resolve to "Arizona Diamondbacks". If the game is tied at the conclusion of the 5th inning, this market will resolve to "Arizona Diamondbacks". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks is winning the game by 2 or more runs at the conclusion of the 5th inning. Otherwise, this market will resolve to "Cincinnati Reds". If the game is tied at the conclusion of the 5th inning, this market will resolve to "Cincinnati Reds". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 3 or more runs by the conclusion of the 5th inning. If the combined total is less than 3, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 4 or more runs by the conclusion of the 5th inning. If the combined total is less than 4, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 5 or more runs by the conclusion of the 5th inning. If the combined total is less than 5, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 6 or more runs by the conclusion of the 5th inning. If the combined total is less than 6, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Over" if the Cincinnati Reds and Arizona Diamondbacks combine to score 7 or more runs by the conclusion of the 5th inning. If the combined total is less than 7, this market will resolve to "Under". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40 PM ET: This market will resolve to "Yes" if the game goes to extra innings. This market will resolve to "No" if the game is completed without going to extra innings. For the purposes of this market, a game goes to extra innings if play begins in any inning after the scheduled regulation innings for that game, such as the 10th inning in a standard 9-inning MLB game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. If the game ends in a tie before extra innings are played, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.The Arizona Diamondbacks hold a clear edge entering their late-August home series against the Cincinnati Reds at Chase Field, thanks to a 67-61 record that places them in playoff contention in the NL West while the Reds sit at 61-67 near the bottom of the NL Central. Phoenix's extreme late-summer heat and the D-backs' stronger recent form and home splits shape trader expectations, especially with probable starters like Eduardo Rodriguez on the mound. The Reds' inconsistent offense and road performance add pressure in a matchup where historical series results and current standings reinforce the home side's advantages, though bullpen reliability and any late lineup tweaks could shift momentum.

In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40PM ET:

This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game.

This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game.

If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50.

The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.
Volume
$99
End Date
Aug 29, 2026
Market Opened
Aug 15, 2026, 9:00 AM ET

Resolution Source

https://www.mlb.com/

Resolver

0x65070BE91...
In the upcoming MLB game between the Cincinnati Reds and Arizona Diamondbacks, scheduled for August 21 at 9:40PM ET: This market will resolve to "Cincinnati Reds" if the Cincinnati Reds win the game. This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.

Beware of external links.

Frequently Asked Questions

The “Reds vs. Diamondbacks” market on Polymarket lets you trade on the outcome of the MLB game between the Cincinnati Reds and the Arizona Diamondbacks, scheduled for August 21, 2026 at 9:40 PM ET. The primary market is the moneyline — which team will win the game — where Diamondbacks is currently priced at 57¢ (57% implied probability) and Reds at 43¢ (43%). Beyond the moneyline, sports markets on Polymarket may feature spreads, totals (over/under), and player props, giving you multiple ways to trade on this game. Prices reflect real-time crowd-sourced probabilities. Shares in the correct outcome pay out $1 each when the market resolves after the game ends.

As of now, the “Reds vs. Diamondbacks” market has generated $99 in total trading volume across all market types (moneyline, spreads, totals, and player props). This volume reflects active engagement from the Polymarket trading community, and a deeper pool of traders generally means more informative, reliable odds. You can track live price movements and trade on any market directly on this page.

To trade on “Reds vs. Diamondbacks,” start by choosing the market type you want to trade: Moneyline (which team wins), Spreads (margin of victory), Totals (combined score over/under), or Player Props (individual player stat lines). Each market shows the current price for each side — for example, the moneyline shows CIN at 43¢ and ARI at 57¢. Select the side you want to trade, choose Buy to take a position or Sell to close an existing one, enter your amount, and click Trade. If your chosen side is correct when the game ends and the market resolves, your shares pay out $1 each. If it’s incorrect, they pay out $0. You can also sell your shares at any time before the game ends to lock in a profit or cut a loss.

The current moneyline odds for “Reds vs. Diamondbacks” show Arizona Diamondbacks at 57¢ (57% implied probability) and Cincinnati Reds at 43¢ (43%). All odds update in real-time as traders buy and sell shares, reflecting the latest collective view of how this game will play out. Check back frequently or bookmark this page to follow how the odds shift as game time approaches.

The “Reds vs. Diamondbacks” market resolves based on the official final score of the MLB game as reported by MLB’s official results, including overtime if applicable. Moneyline markets resolve to the team that wins the game. Spread markets resolve based on the final margin of victory relative to the posted line. Totals (over/under) markets resolve based on the combined final score of both teams. Player prop markets resolve based on official box score statistics. If the game is postponed or canceled, the market resolution rules (available in the Rules section on this page) specify how that scenario is handled. We recommend reviewing the full resolution criteria before trading.