Highlights! ‘King’ Delivers One Of The Sickest Armbars Ever | UFC 331

Casey O’Neill delivered one of the sickest armbar finishes you’ll ever see inside of the Octagon earlier tonight (Sat., Sept. 19, 2026) at UFC 331 LIVE on Paramount+ from inside Crypto.com Arena in Los Angeles, Calif., forcing fellow women’s flyweight Eduarda Moura to tap in the opening round of their “Prelims” matchup.

Moura acted quickly to start the fight and was able to score top control on the ground. It’s exactly where the Brazilian grappler wanted to be, but outside of a few hard punches she wasn’t able to do much damage. O’Neill had a strong hold of the hands and did well to threaten with transitions off her back.

A few moments later, O’Neill was able to create some space and began to kick Moura off of her. During the scramble O’Neill quickly grabbed a hold of Moura’s arm and immediately locked up an armbar. Moura had nothing left to do but tap for the first time in her career.

It was one of the slickest armbar submissions in recent memory and even more impressive when slowed down and broken down by Joe Rogan and Daniel Cormier cageside.

Check out the video highlights below:

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