Tanner Boser VS Jhonata Diniz

Tanner Boser defeated Jhonata Diniz by TKO (punches) at 4:26 of round three in a heavyweight bout at UFC Fight Night: Buckley vs. Malott in Edmonton on October 17, 2026. Boser controlled all three rounds with persistent takedowns, using fence work and top position to limit Diniz's output; in round two he advanced through half guard to the crucifix, where elbows and right hands opened a cut on Diniz's head. The finish came in round three when Boser shot in for a single-leg takedown, secured full mount with more than four minutes remaining, and transitioned to the back while landing continuous punches. Referee Jason Herzog warned Diniz to defend himself repeatedly before stopping the contest as Diniz rolled to his side. The win gave Canada its first victory of the night on the Edmonton card.

Tanner Boser (22-11-1) fights to rebuild after a knockout loss to Gokhan Saricam in April, while Brazilian Jhonata Diniz (9-2) returns from his own losing skid — a defeat to Mario Pinto in October 2025. With both heavyweights needing to arrest a slide, this is a pivotal fight for UFC roster retention in a weight class where a single knockout can revive or end a career in moments.