CASEY O'NEILL

Born in Scotland and raised in Australia, Casey O’Neill developed her martial arts skills through childhood kickboxing training before moving into professional mixed martial arts. She claimed the Eternal MMA strawweight title during her time on the Australian regional circuit. Since arriving in the Ultimate Fighting Championship in 2021, she has competed as a flyweight. Representing the Fight Ready gym, the versatile athlete has built a reputation for high-volume striking and technical grappling capabilities, securing significant victories over competitors like Roxanne Modafferi throughout her climb within the division.

Entering the upcoming event, O’Neill holds a professional record of 12-2-0. Her recent performances show a current winning streak, having defeated Eduarda Moura via armbar in September 2026 and Gabriella Fernandes by knockout in March 2026. Prior to those victories, she earned a unanimous decision against Luana Santos in August 2024. This follows a difficult stretch in late 2023, where she dropped back-to-back contests against Ariane Lipski by submission and Jennifer Maia by decision.