Pantoja Enters UFC 331 as 37% Underdog to Reclaim Flyweight Belt
Pantoja's implied probability fell 12 points in three days, driven by a nine-month injury layoff and Van's successful title defense in May.
Bottom line
Traders have sold Pantoja down to a clear underdog at 37%, pricing his only remaining 2026 title shot as a loss more often than not.
- Market average
- 1% YES
- Best listed price
- 0.3¢ · Polymarket
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Alexandre Pantoja's UFC 331 Rematch Chances: What the 37% Market Price Means Tonight
Alexandre Pantoja has a 37% market-implied chance of being UFC Flyweight Champion at the end of 2026, according to current pricing on Kalshi and Polymarket, as he faces champion Joshua Van tomorrow at Crypto.com UFC 331 in Los Angeles. That figure stood at 49% three days ago. This fight is almost certainly his last shot at reclaiming the belt in 2026: a loss leaves no realistic path to a third title shot before December 31.
The 12-point collapse makes Pantoja a clear market underdog, not just to win tomorrow night, but to end the year wearing the belt.
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Manel Kape
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The math is straightforward: the 37% implied probability effectively represents Pantoja's chances of winning the UFC 331 rematch itself. There is no secondary path. A loss eliminates him from realistic 2026 title contention. A win would almost certainly vault his price back above 50%, because holding the belt is the single best predictor of still holding it at year's end.
Why Pantoja's Title Chances Collapsed 12 Points in 72 Hours Before UFC 331
A 12-percentage-point drop in three days is not routine drift. It aligns precisely with UFC 331 fight week, when sportsbook lines, training camp reports, and media coverage intensify and flow into prediction market pricing.
The cross-platform spread between Kalshi (36%) and Polymarket (38%) is narrow, suggesting both markets are digesting the same information rather than one platform leading the other. The period low of 36% sits just one point below the current price, with no sign of a reversal forming.
No single triggering event, such as an injury announcement or a dramatic weigh-in incident, appears in published reporting from the last 72 hours. The more likely explanation is structural: as fight week progressed, the market fully absorbed the reality that Pantoja is returning from a nine-month layoff after a severe arm injury. That layoff, combined with Van's proven title defense record, has made traders increasingly skeptical of a Pantoja recapture.
The critical context: Pantoja didn't lose his belt in a competitive five-round war. He lost it in 26 seconds at UFC 323 in December 2025 due to an arm injury. That result produced no meaningful data about the stylistic matchup. And yet the market treats Van as the clear favorite, which says more about Van's trajectory than about what happened in the first fight.
Joshua Van vs. Pantoja 1, and Why Van Is More Than a Fluke Champion
Joshua Van didn't just win the title under unusual circumstances. He validated it. In May 2026, Van successfully defended the flyweight championship against Tatsuro Taira at UFC 328, proving he could hold the belt against elite competition in a full fight. That defense transformed the narrative around Van from "guy who benefited from an opponent's injury" to legitimate reigning champion with a defense on his record.
This is the strongest case against Pantoja. Van is 24 years old, improving rapidly, and fighting with championship confidence built on an actual defense. Pantoja, at 36, is returning from a major injury that cost him nine months of cage time. Extended layoffs at the elite level correlate with slower reaction times, diminished cardio pacing, and hesitancy in exchanges.
Pantoja himself has acknowledged the emotional weight of the comeback. In a recent interview, he described his mindset as "Curtindo cada momento" (Enjoying every moment), a phrase that reads more like gratitude for returning to competition than the cold confidence of a man certain he will reclaim his title. Markets may be reading that tone correctly.
The Case for Pantoja at 37%: Is the Market Overreacting?
Here is the counterargument: the first fight produced zero competitive data. Van never had to solve Pantoja's grappling, survive his pace, or handle his pressure over three or five rounds. The injury stoppage at 26 seconds tells us nothing about how these two match up when healthy. Pantoja, before the injury, was arguably the most complete flyweight in UFC history, with title defenses against Brandon Royval, Brandon Moreno, and Steve Erceg.
If Pantoja's arm has fully healed, and nine months is generally sufficient for the type of injury reported, he brings a technical toolkit that Van has never faced in the cage. Pantoja's grappling transitions, clinch work, and ability to impose wrestling on strikers represent problems that Taira, Van's most recent opponent, does not replicate. A 37% price implies roughly 5-to-8 odds against. For a former champion with Pantoja's resume entering a rematch where the first result was functionally a no-contest in terms of competitive information, that price may undervalue his chances.
The question is whether the market is pricing Pantoja's age and layoff correctly or anchoring too heavily on Van's youth and momentum. Both readings are defensible. Tomorrow night will answer it.
What Happens After UFC 331: Resolution and Remaining Scenarios
The Who will be UFC Flyweight champion at the end of 2026? market resolves on December 31, 2026. If Pantoja wins tomorrow, he becomes champion and the heavy favorite in this market. If he loses, his price likely collapses to single digits, because the UFC has already announced plans for UFC 332 in Salt Lake City with a flyweight title bout, and a Pantoja loss would almost certainly remove him from that card's title picture.
This is a binary event compressed into a single fight. The 37% price is the market's final word before the cage door closes. By Saturday morning, it will be either vindicated or exposed.
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The story so far: Who will be UFC Flyweight champion at the end of 2026?
4 updates · Mar 3 – Sep 22
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