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Casey O’Neill details knee injury moments before UFC 331 submission

Sherdog • 1 min read • Latest: Sep 19, 2026, 10:31 PM

Last updated Sep 19, 2026

Casey O’Neill details knee injury moments before UFC 331 submission
Summary

Casey O’Neill faced Eduarda Moura at UFC 331 on September 19, 2026, where she reported a knee issue just minutes into the fight. O’Neill indicated her left knee 'gave out' after throwing a kick, impacting her defense. Despite this, she managed to secure an armbar submission on Moura, finishing the fight quickly. O’Neill, who previously missed nearly two years due to a right knee injury, has now won both of her fights since returning, finishing each in the first round.

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Sherdog
Status Watch
  • •O’Neill felt her left knee give out early in the fight.
  • •Moura attempted a mont but was countered by O’Neill's submission.
  • •O’Neill previously missed nearly two years due to injury.
  • •She has now finished both opponents in her comeback.
  • •Moura is currently on a two-fight losing streak in the UFC.
Latest Updates
  • 10:31 PMSherdog — Casey O’Neill says knee ‘gave out’ moments before UFC 331 submission
What they're saying
"

Casey O’Neill felt something off just minutes into her UFC 331 clash against Eduarda Moura.

— Sherdogby sayannag88@gmail.com (Sayan Nag)
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