Sean King III knocks out Jessie Rosas at Noche UFC 4

Sean King III secured a victory in his UFC debut against Jessie Rosas on September 12, 2026, at the Desert Diamond Arena in Glendale, Arizona. The featherweight bout ended at the 36-second mark of the first round when King slammed Rosas to the canvas and landed follow-up strikes. King, currently holding an undefeated 7-0 record, transitioned from a body lock to a head-first slam that rendered Rosas unconscious. Rosas, competing on eight days' notice and moving up from his natural bantamweight division, struggled to counter the wrestling-heavy approach. The result moves King to a perfect professional start while leaves Rosas with a loss in his return to the promotion. The event featured this matchup as a showcase for two Octagon newcomers seeking to establish their standing within the UFC ranks.

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