At UFC Vegas 121 on September 26, 2026, Raul Rosas Jr. claimed a dramatic TKO victory against Raoni Barcelos in a main event that stunned fans. The closely contested bantamweight matchup ended in the fifth round when Rosas Jr. executed a takedown slam that left Barcelos unconscious. Recognizing Barcelos's dire condition, Rosas Jr. avoided striking further, and referee Herb Dean swiftly halted the fight at 1:38 of round five. Barcelos was stretchered out but regained consciousness soon after and was reported to be responsive and undergoing medical scans.

This win marked Rosas Jr.’s first UFC main event and extended an impressive six-fight winning streak, improving his record to 13-1. Despite Barcelos leading on the scorecards at the stoppage, the fight demonstrated fierce competitiveness and endurance from both fighters. Their efforts earned them the evening’s “Fight of the Night” honors, celebrating the contest as an exceptional display of skill and resilience. Meanwhile, Ailin Perez took the co-main event, securing a unanimous decision over Norma Dumont.

Performance bonuses were also awarded to Luis Hernandez and Yazmin Jauregui for their remarkable finishes. Hernandez, a recent Dana White Contender Series contract winner, stepped in late to submit Sedriques Dumas in the first round, highlighting his sharp rise within the light heavyweight ranks. Jauregui delivered a brutal knockout of Vanessa Demopoulos with a storm of punches and hammerfists early in their women’s strawweight bout, cementing her status as a dangerous contender.

The event featured several other notable results, including Ilimbek Akylbek Uulu winning a bantamweight bout by disqualification and Valesca Machado fighting to a second-round TKO victory in women’s strawweight. The card’s excitement and drama were broadcast on Paramount+ at 8 p.m. ET and reflected the ongoing growth and intensity of the UFC’s Fight Night series. UFC Vegas 121 was a night of both thrilling athletic achievement and a sobering reminder of the sport’s physical risks.