Tsarukyan vs. Ruffy: The Wrestling Gap, the Back Injury, and the One-Punch Escape Route

At Crypto.com Arena in Los Angeles, the UFC 331 co-main event is not just another lightweight fight. Arman Tsarukyan, ranked No. 2 in the division, carries a 23-3 record and a five-fight winning streak. Mauricio Ruffy, ranked No. 10, has won 13 of his 14 fights by KO/TKO. The FanDuel line, Tsarukyan -275, Ruffy +225, gives the Armenian wrestler roughly a 70% implied win probability. But the real story is not the odds — it is the wrestling gap, the back injury, and one-punch finishing power. Tsarukyan withdrew one day before UFC 311 because of a back injury. For a wrestler, that is not a minor note; it attacks the foundation of his style. Ruffy enters on the back of a first-round knockout of Michael Chandler and needs only one clean exchange to change the fight. The decisive missing data point is Ruffy's takedown defense. If he stops the first few takedown attempts, the market's read begins to crack. If Tsarukyan imposes his grappling early, the five-round format tilts further in his favor. The winner is expected to be positioned as the next challenger for Justin Gaethje. That makes this a title eliminator dressed as a co-main event, and the UFC's decision to schedule five rounds confirms the stakes. Forget the odds for a moment. The first exchange will tell the real story: a compromised spine meeting a finisher with a 93% knockout rate.