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#14 Women's Flyweight Division



Casey O'Neill

Women's Flyweight Division

9-2-0 (W-L-D)


Wins by Knockout


Wins by Submission


First Round Finishes

Casey O'Neill

athlete record


Learn more about Casey O'Neill's UFC history, fighter facts, and Q&A below.

Place of Birth
Irvine, Scotland
Fighting style
Octagon Debut
Feb. 20, 2021
Leg reach
  • Pro since 2019

  • Three wins by KO, two by submission (2 RNC)

  • One first-round finish

  • Went the five-round distance in 2019 win over Miki Motono

UFC 296 (12/16/23) O'Neill was submitted by Ariane Lipski via armbar at 1:18 of the second round 

UFC 286 (3/18/23) O'Neill lost a three round unanimous decision to Jennifer Maia 

UFC 271 (2/12/22) O’Neill won a three round split decision over Roxanne Modafferi

UFC Fight Night (10/2/21) O’Neill stopped Antonina Shevchenko via strikes at 4:47 of the second round

UFC on ESPN (6/19/21) O’Neill submitted Lara Procopio via rear naked choke at 2:54 of the third round

UFC Fight Night (2/20/21) O’Neill stopped Shana Dobson via strikes at 3:41 of the second round

When and why did you start training for fighting? I started training kickboxing as a young child because my dad took me with him as he went, and I always wanted to get involved. Same thing when I started BJJ / MMA, and then I was 13 when my dad started an MMA show. I begged to fight for a long time and eventually a few years later he allowed me to start and I have never stopped.

What ranks and titles have you held? I have a brown belt in jiu-jitsu, and I was a 2x strawweight champion regionally in Australia. 

Do you have any heroes? I wouldn’t say I have any heroes in terms of MMA; I mainly was inspired to start because of my dad, and my cousin who was a fighter.

What does it mean for you to fight in the UFC? It is a lifelong dream that I have had since I was very young. This feels super exciting and very surreal but I can’t wait to showcase what I can do on the biggest stage in the sport.

Did you go to college and if so what degree did you earn? No, I didn’t - I started fighting before even finishing high school and decided not to pursue a Plan B, so I put my all into fighting. 

What was your job before you started fighting? I was a barista. 

Specific accomplishments in amateur competition? 5-2 amateur, losing my first two and winning 5 in a row - all by finish – afterward. 

Favorite grappling technique: Joint locks 

Favorite Striking technique: Boxing