Professional Record
12-2-0
Current Elo Rating
1701
True Contender System
Women’s Flyweight Ranking
#9
Pound-for-Pound Ranking
#17
About Casey O'Neill
A rebuild that points toward the top again
Casey O'Neill began her UFC run as one of the most promising flyweight prospects, winning her first nine professional fights before a serious knee injury halted her progress. Her return initially brought losses to Jennifer Maia and Ariane Lipski, forcing her to rebuild her career.
Fighting style
O'Neill fights with plenty of volume and a great willingness to keep a high pace. She can work on the feet, but she is especially comfortable when scrambles and grappling transitions appear. Her activity from bottom positions also makes her dangerous even when she seems to be losing the exchange.
A 2026 breakthrough
In 2026 that rebuild took a big step forward. She first knocked out Gabriella Fernandes and, on September 19, produced a spectacular submission of Eduarda Moura at UFC 331, escaping a difficult situation and finishing the fight with a first-round armbar.
Tale of the tape
- Height
- 168 cm
- Reach
- 175 cm
- Weight
- 56.9 kg
- Age
- 29 years
- Place of birth
- Irvine, Scotland
- UFC debut
- February 20, 2021
- Team / gym
- Bangtao Muay Thai
Activity
Next fight
No bout announced
Casey O'Neill has no next fight confirmed by the UFC yet.
This section updates automatically as soon as one is announced.
Last fight
Casey O'Neillvs.Eduarda Moura
W · submission
- Date
- September 19, 2026
- Elo change
- +42
Career Statistics
Professional career
12-2-0
Wins · Losses · Draws
14 fights
Wins by method
- KO/TKO
- 3
- Submissions
- 2
- Decisions
- 2
5 Finishes
71.4% of 7 wins
Of these 12 wins, 5 have no method recorded in our history.
In the UFC
7-2-0
Wins · Losses · Draws
9 fights
Wins by method
- KO/TKO
- 3
- Submissions
- 2
- Decisions
- 2
5 Finishes
71.4% of 7 wins
Elo
Current Elo
1,701
Peak Elo
1,701
From peak
0
Streak3 Wins
Biggest Elo gain
Achievements and career
- Current streak: 3 straight wins
- Best recorded streak: 4 straight wins
Elo History
9 recorded UFC fights
UFC Start
1500
Current
1701
Peak Elo
1701
Total
+201
UFC Fight History
| Date | Result | Opponent | Method | Elo | Change |
|---|---|---|---|---|---|
| Sep 19, 2026 | W | Eduarda Moura | Submission | Elo1701 | Change+42 |
| Mar 28, 2026 | W | Gabriella Fernandes | KO/TKO · R1 · 3:11 | Elo1659 | Change+52 |
| Aug 18, 2024 | W | Luana Santos | Decision · R3 · 5:00 | Elo1607 | Change+48 |
| Dec 16, 2023 | L | Ariane da Silva | Submission · R2 · 1:18 | Elo1559 | Change-64 |
| Mar 18, 2023 | L | Jennifer Maia | Decision · R3 · 5:00 | Elo1623 | Change-35 |
| Feb 12, 2022 | W | Roxanne Modafferi | Decision · R3 · 5:00 | Elo1658 | Change+14 |
| Oct 02, 2021 | W | Antonina Shevchenko | KO/TKO · R2 · 4:47 | Elo1644 | Change+44 |
| Jun 19, 2021 | W | Lara Procópio | Submission · R3 · 2:54 | Elo1600 | Change+49 |
| Feb 20, 2021 | W | Shana Dobson | KO/TKO · R2 · 3:41 | Elo1550 | Change+50 |
Competitive Profile
Casey O'Neill’s position is calculated by the True Contender MMA Elo system from real results and strength of opposition. The profile updates with the rankings after new fights are processed.