Casey O'Neill
“King”
Professional record
Last 5: WWWLL
Profile
- Age
- 29 (born October 7, 1997)
- Born in
- Irvine
- Height
- 5' 6"
- Weight
- 125 lbs.
- Reach
- 69"
- Stance
- Orthodox
- UFC record
- 7-2
How the fights ended
Wins in the UFC7
- KO/TKO 3
- Submission 2
- Decision 2
Losses in the UFC2
- Submission 1
- Decision 1
UFC career stats
Striking
- Significant strikes landed per minute
- 7.6 top 3%
- Significant strikes absorbed per minute
- 5.36
Grappling
- Takedowns per 15 minutes
- 1.35 top 43%
- Submission attempts per 15 minutes
- 0.8
Next fight
In the record book
- #4 · Most significant strikes landed per minute (all-time)7.60
- #5 · Most head strikes in a fight (all-time)187
- #1 · Most head strikes in a fight (women's flyweight)187
- #2 · Most finishes (women's flyweight)5
- #2 · Most knockout wins (women's flyweight)3
- #2 · Most significant strikes in a fight (women's flyweight)229
- #2 · Most ground and pound knockouts (women's flyweight)2
- #3 · Most significant strikes landed per minute (women's flyweight)7.60
- #3 · Most armbar wins (women's flyweight)1
About Casey O'Neill
Born on October 7, 1997 in Irvine, Australia, Casey O'Neill "King" competes as a women's flyweight mixed martial artist. O'Neill stands 5' 6" with a 69" reach, long for that height. O'Neill is ranked #12 in the official UFC women's flyweight rankings.
O'Neill has fought professionally since 2019, debuting with Eternal MMA. O'Neill arrived in the UFC with a 5-0 record. O'Neill first fought in the UFC at UFC Fight Night: Blaydes vs. Lewis in February 2021 and beat Shana Dobson by KO/TKO. In the UFC, O'Neill is 7-2 across 9 fights.
O'Neill's 7 UFC wins are split between 3 by knockout, 2 by submission and 2 on the scorecards. In the stats, O'Neill lands more significant strikes per minute than 97% of women's flyweights and is more accurate with significant strikes than 85% of women's flyweights. O'Neill ranks #4 in UFC history for most significant strikes landed per minute.
After 19 months away, O'Neill returned at UFC Fight Night: Adesanya vs. Pyfer in March 2026 and beat Gabriella Fernandes. O'Neill was 23 when the first UFC win came, against Shana Dobson. Before and outside the UFC, O'Neill fought in Eternal MMA (4-0) and UAE Warriors (1-0).
Most recently, O'Neill beat Eduarda Moura by armbar from guardhelicopter armbar at UFC 331: Van vs. Pantoja 2 in September 2026.
UFC fight history
-
W
Submission · Armbar From GuardHelicopter armbar · R1 3:22
Sep 19, 2026
1Str 0TD 0KD -
W
KO/TKO · Punches to Head At Distance · R1 3:11
UFC Fight Night: Adesanya vs. Pyfer
Mar 28, 2026
25Str 0TD 1KD -
W
Decision - Unanimous · R3 5:00
UFC 305: Du Plessis vs. Adesanya
Aug 17, 2024
83Str 0TD 0KD -
L
Submission · Armbar On Ground · R2 1:18
UFC 296: Edwards vs. Covington
Dec 16, 2023
31Str 0TD 0KD -
L
Decision - Unanimous · R3 5:00
Mar 18, 2023
137Str 0TD 0KD -
W
Decision - Split · R3 5:00
UFC 271: Adesanya vs. Whittaker 2
Feb 12, 2022
229Str 0TD 0KD -
W
KO/TKO · Punches to Head From Mount · R2 4:47
UFC Fight Night: Santos vs. Walker
Oct 2, 2021
52Str 3TD 0KD -
W
Submission · Rear Naked Choke · R3 2:54
Jun 19, 2021
71Str 1TD 0KD -
W
KO/TKO · Punches to Head From Mount · R2 3:41
UFC Fight Night: Blaydes vs. Lewis
Feb 20, 2021
49Str 4TD 0KD
Full MMA career
Casey O'Neill is 12-2 across 14 professional fights in 3 promotions, since a pro debut on April 5, 2019 (Eternal MMA). 5 of those fights were outside the UFC.
Pro wins12
- KO/TKO 4
- Submission 3
- Decision 5
Pro losses2
- Submission 1
- Decision 1
- Finish rate
- 58% of wins
- Longest win streak
- 9
- Current streak
- 3 wins
Fights by promotion
| Promotion | Record | First fight |
|---|---|---|
| UFC | 7-2 | 2021 |
| Eternal MMA | 4-0 | 2019 |
| UAE Warriors | 1-0 | 2020 |
All professional fights
| Result | Opponent | Date |
|---|---|---|
| W | Eduarda Moura | Sep 19, 2026 |
| W | Gabriella Fernandes | Mar 28, 2026 |
| W | Luana Santos | Aug 17, 2024 |
| L | Ariane Lipski | Dec 16, 2023 |
| L | Jennifer Maia | Mar 18, 2023 |
| W | Roxanne Modafferi | Feb 12, 2022 |
| W | Antonina Shevchenko | Oct 2, 2021 |
| W | Lara Procópio | Jun 19, 2021 |
| W | Shana Dobson | Feb 20, 2021 |
| W | Christina Stelliou | Sep 25, 2020 |
| W | Caitlin McEwen | Feb 29, 2020 |
| W | Miki Motono | Oct 4, 2019 |
| W | Jada Ketley | Jul 27, 2019 |
| W | Amira Hafizović | Apr 5, 2019 |
Full professional record from Wikipedia (CC BY-SA 4.0).
Quick answers
What is Casey O'Neill's record?
Casey O'Neill's professional MMA record is 12 wins, 2 losses and 0 draws.
How old is Casey O'Neill?
Casey O'Neill is 29 years old, born on October 7, 1997.
How tall is Casey O'Neill and what is their reach?
Casey O'Neill stands 5' 6" with a 69" reach.
Who did Casey O'Neill fight last?
Casey O'Neill beat Eduarda Moura by Submission at UFC 331: Van vs. Pantoja 2 on Sep 19, 2026.