Casey O'Neill vs. Eduarda Moura set for UFC 331 in Los Angeles

2 sources2 min read • Latest: Aug 2, 2026, 10:00 PM

Last updated Aug 2, 2026

Casey O'Neill vs. Eduarda Moura set for UFC 331 in Los Angeles
Summary

UFC 331 is scheduled for September 19 at Crypto.com Arena in Los Angeles, featuring a women’s flyweight fight between Casey O'Neill and Eduarda Moura. O'Neill is coming off back-to-back victories, including a first-round knockout at UFC Seattle in March, while Moura holds a 3-2 record in the UFC, having faced issues with weight. The event is currently without a main event announcement as it approaches less than two months away.

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Status Watch
  • UFC 331 takes place on September 19 in Los Angeles.
  • Casey O'Neill has won two consecutive fights.
  • Eduarda Moura holds a 3-2 UFC record.
  • O'Neill's last fight was a knockout victory in March.
  • Event has no main event announced yet.
Latest Updates
  • 10:00 PMMMA FightingUFC 331: Flyweight tilt booked for promotion’s return to L.A.
  • 10:00 PMYahoo SportsUFC 331: Flyweight tilt booked for promotion’s return to L.A.
What they're saying
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PERTH, AUSTRALIA - AUGUST 18: Casey O'Neill of Scotland prepares to face Luana Santos of Brazil in a flyweight fight during the UFC 305 event at RAC Arena on August 18, 2024 in Perth, Australia. (Photo by Jeff Bottari/Zuffa LLC) A pivotal women’s flyweight matchup is slated for September. Multiple people with knowledge of the promotion’s plans confirmed to MMA Fighting that Casey O’Neill is set to face Eduarda Moura at UFC 331. The event takes place Sept. 19 and at Crypto.com Arena in Los Angeles, with the UFC officially announcing the date and location Saturday. Leo Guimaraes first reported the news on social media. O’Neill burst onto the UFC scene with four impressive wins, but then lost consecutive one-sided fights to Jennifer Maia and Ariane Lipski. Since then, O’Neill bounced back with back-to-back wins, including a first-round knockout victory against Gabriella Fernandes at UFC Seattle in March — O’Neill’s first fight in nearly two years. Moura has had an up-and-down run with the UFC for a number of reasons. The 32-year-old is 3-2 in five octagon outings, but has also missed weight three times in her promotional tenure — including in her most recent fight against Wang Cong, where she lost via decision at UFC Vegas 113 in February. As of now, UFC 331 is without an announced main event, despite the card being less than two months away.

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