UFC 331 Returns to Los Angeles with Women's Flyweight Matchup Between O'Neill and Moura

The UFC will host UFC 331 on September 19 at Crypto.com Arena in Los Angeles, with a women's flyweight matchup between Casey O'Neill and Eduarda Moura serving as a confirmed bout on the card. The event represents the promotion's return to the Los Angeles market, though the main event has not yet been announced with the date less than two months away.

O'Neill Faces Critical Test After Recovery

Casey O'Neill arrives at UFC 331 following a resurgent stretch in her career. The fighter won four consecutive bouts to establish herself in the women's flyweight division before encountering setbacks. Losses to Jennifer Maia and Ariane Lipski pushed O'Neill backward in the rankings, but she has since recovered momentum with consecutive victories. Most recently, O'Neill secured a first-round knockout victory against Gabriella Fernandes at UFC Seattle in March, marking her first octagon appearance in nearly two years.

Moura Carries Mixed Record into Matchup

Eduarda Moura brings an inconsistent promotional record into the September bout. The 32-year-old has compiled a 3-2 record across five UFC fights, but her tenure has been complicated by weight-related issues. Moura has missed weight three times during her time with the organization, including in her most recent fight against Wang Cong at UFC Vegas 113 in February, where she lost via decision despite the weight miss.

Card Status and Event Details

UFC 331 will take place at Crypto.com Arena, one of the premier venues in Southern California. The promotion officially confirmed the date and location on Saturday, with multiple sources within the MMA industry verifying the O'Neill versus Moura matchup. As the event approaches, the UFC has not yet disclosed which fighter will headline the card, leaving significant questions about the overall structure of the September 19 event.