The full UFC 331 card has been revealed, and the September 19 event in Los Angeles is shaping up to be one of the year's biggest fight nights, anchored by a flyweight title rematch and a pivotal lightweight clash.
Van vs. Pantoja II: Unfinished Business
Joshua Van puts his UFC flyweight championship on the line against Alexandre Pantoja in the night's main event — a rematch that was made necessary by one of the more unfortunate endings in recent memory. During their first meeting in 2025, Pantoja's arm gave out after he landed awkwardly in the opening round, abruptly ending what had been a dominant title reign. The injury forced a stoppage before either man could truly settle the question of who the better fighter is.
Van wasted no time establishing himself as a legitimate champion during Pantoja's recovery. The new titleholder delivered what many are calling a Fight of the Year contender against Tatsuro Taira in May, successfully defending the belt in spectacular fashion. Now, with Pantoja fully healthy and hungry, Van gets his chance to silence any remaining doubters about the legitimacy of his reign.
Tsarukyan and Ruffy Collide at 155
The co-main event brings together two lightweights with serious title aspirations, as Arman Tsarukyan squares off with Mauricio Ruffy in a scheduled five-round bout. Both men are chasing a shot at current champion Justin Gaethje, making this a pivotal matchup at 155 pounds.
Tsarukyan enters riding a five-fight winning streak that includes notable victories over Charles Oliveira, Beneil Dariush, and Dan Hooker — a run that has cemented him as the division's premier contender. He spent much of the past year competing in RAF, wrestling on a near-monthly basis, and now returns to the Octagon looking to keep his momentum rolling.
Ruffy, meanwhile, arrives with serious confidence after a dominant showing at the UFC White House card, where he dismantled Michael Chandler in stunning fashion. That performance extended his winning streak to three consecutive victories, and he'll look to make it four against one of the toughest opponents of his career.
Full Card Taking Shape
Beyond the two marquee bouts, the remainder of the UFC 331 lineup has also been announced, though the complete bout order is yet to be determined. The event takes place September 19 in Los Angeles, and with the main card already stacked, fight fans have plenty of reason to circle the date on their calendars.
What a flyweight main event usually looks like
The card is headlined by a 125-pound title rematch. The archive has a clear expectation for how those tend to end.
Across 40,013 archived bouts contested by fighters listed at flyweight:
| Flyweight bouts | Share |
|---|---|
| Went to the judges | 33.1% |
| Ended by submission | 33.6% |
| Ended by KO or TKO | 29.3% |
A third of flyweight fights reach the scorecards. Only strawweight goes further, at 38.6%. At the other end of the ladder, heavyweight reaches the judges 17.2% of the time and light heavyweight 19.4%.
The reason is not that smaller fighters hit softer in absolute terms — it is that they carry proportionally less finishing power relative to how fast they move and how well they recover. Flyweight rounds contain more exchanges and produce fewer conclusions, which is why the division reliably produces the closest scorecards and the most disputed decisions on any card it appears on.
There is a second layer here. The first Van–Pantoja meeting ended when Pantoja's arm gave out in the opening round — an injury stoppage, which the archive records just 2,777 times in 1,049,038 bouts. A flyweight title changing hands via the sport's rarest ending is why this rematch exists at all.
Method: figures drawn from the MMAHIT fight archive of 1,049,038 recorded bouts across 347,296 fighters, events dated December 1963 to May 2026. Each bout is stored once per corner and has been de-duplicated. Draws and no-contests are excluded from win-rate calculations. Division is taken from the weight class recorded on each fighter's profile rather than the contracted weight of the individual bout.
