John Castaneda
JOH9|UFC
Trading Volume$128
Active Markets9
Weight ClassBantamweight
Record21-8
Fighter Profile
Nickname"Sexy Mexi"
Height5'6"
Reach71"
Weight146 lbs
Age34
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All Markets
| UFC Fight Night: John Castaneda vs. Mark Vologdin (Bantamweight, Prelims) | John Castaneda46% | Mark Vologdin55% |
| Will Mark Vologdin win by KO or TKO? | Yes53% | No47% |
| Will the fight be won by submission? | Yes50% | No51% |
| O/U 0.5 Rounds | Over73% | Under28% |
| O/U 1.5 Rounds | Over51% | Under50% |
| Fight to Go the Distance? | Yes51% | No49% |
| Will the fight be won by KO or TKO? | Yes51% | No49% |
| Will John Castaneda win by KO or TKO? | Yes53% | No47% |
| O/U 2.5 Rounds | Over51% | Under50% |
About John Castaneda
Frequently Asked Questions
Polymarket currently hosts 9 active markets for John Castaneda (JOH9) with over $128 in total trading volume. You can trade on match winners (moneyline), spreads, totals (over/under), and other markets across all of their upcoming matches. Each market is priced as an implied probability — for example, a price of 65¢ means traders collectively believe there is a 65% chance of that outcome. New markets are added as John Castaneda's schedule progresses.
Based on their recent matches, John Castaneda has a 72% win rate with a record of 21-8. You can view their full match-by-match results on this page, including scores, opponents, and context. Recent form is one of the strongest factors influencing market odds — a team on a winning streak will typically see higher implied probabilities, while a losing run often shifts odds against them.
Each UFC market on Polymarket is structured as a yes/no question — for example, "Will John Castaneda win?" You buy shares in "Yes" or "No" at the current market price, which reflects the crowd-sourced implied probability. If your side is correct when the match concludes, your shares pay out $1 each. If incorrect, they pay $0. You can also sell your shares at any time before the match ends to lock in a profit or cut a loss. Prices update in real-time as traders react to news like injury reports, lineup changes, and other developments.
All John Castaneda markets resolve based on official match results, including overtime or extra periods where applicable. Moneyline markets resolve based on the final result of the match. Spread markets resolve based on the final margin relative to the posted line. Totals (over/under) resolve based on the combined final score. You can check the Rules on any individual market page to see the exact resolution criteria, including how postponements or cancellations are handled.
Polymarket odds are set by real traders putting real money behind their positions, which tends to produce well-calibrated probabilities. With over $128 traded on John Castaneda markets alone, these prices aggregate the collective knowledge of participants who follow UFC closely — factoring in team form, injuries, schedule strength, and head-to-head records. Prediction markets have a strong track record of accuracy, often outperforming traditional sources by reflecting the latest information as it emerges. Visit the accuracy page on Polymarket for the latest accuracy metrics across different time periods.
Several factors can move John Castaneda's odds on Polymarket. The most impactful include recent results and form, injury reports and lineup changes, schedule context (regular season vs. playoffs), head-to-head history against specific opponents, and home vs. away performance. Traders incorporate all of these variables into the price, which is why odds can shift rapidly when new information like a key player being ruled out becomes available.
Yes. This page is a free resource for tracking John Castaneda's match results, win rate, and live market odds — no account or trade required. You can monitor how odds shift in real-time as a way to gauge market sentiment on John Castaneda's upcoming matches. If you decide to trade later, you can sign up and fund your account at any time.
Sign up for a free Polymarket account and fund it using crypto, a credit or debit card, or a bank transfer. Then return to this page, choose any active John Castaneda market, select the side you want to trade, enter your amount, and confirm. Your position will be visible in your portfolio, and you can sell at any time before the market resolves.
On Polymarket, the price of each side in a market represents the market's implied probability. A price of 65¢ for JOH9 on the moneyline means traders collectively believe there is roughly a 65% chance that John Castaneda will win that match. If you buy JOH9 shares at 65¢ and they win, you receive $1 per share — a profit of 35¢ per share. If they lose, those shares are worth $0. Prices shift in real-time as new information emerges and traders update their positions.
Polymarket is the world's largest prediction market, where you can stay informed and trade on real-world events. Traders buy and sell shares on outcomes across politics, sports, crypto, finance, tech, culture, and esports — including UFC matches for teams like John Castaneda. Prices reflect real-time, crowd-sourced probabilities backed by real money, offering a transparent, market-driven alternative to traditional odds sources. Visit polymarket.com to explore all available markets.
Updated Apr 11, 2026 9:10 am ET