Casey O'Neill

CASEY O'NEILL

"King"

7-277.8% win rate

FIGHTER IDENTITY

Ultimate Fighting Championship

Organization

UFC
AUS

Nationality

Australian British

Birth

07/10/1997 (29)

Birthplace

Irvine

Scotland

Sport / Status

MMA · Active

Weight class

Flyweight

Height

168 cm (5'6")

Reach

175 cm (69")

Style

MMA

Biography

Casey O'Neill is a Scottish and Australian professional mixed martial artist. She currently competes in the women's Flyweight division of the Ultimate Fighting Championship (UFC). As of 31 March 2026, she is #11 in the UFC women's flyweight rankings.

WIN BREAKDOWN

9 total fights · 43% KO rate

KO/TKO3 (43%)
Submission1 (14%)
Decision2 (29%)

Fight history (9)

1 / 2
Win
vs Eduarda MouraUFC 331 - Van vs. Pantoja 2 — 19/09/2026
Win
vs Gabriella FernandesKO (punches) (R1)UFC Fight Night: Adesanya vs. Pyfer — 28/03/2026
Win
vs Luana SantosDecision - Unanimous (R3)UFC 305 — 17/08/2024
Loss
vs Ariane da SilvaSubmission (Armbar) (R2)UFC 296 — 16/12/2023
Loss
vs Jennifer MaiaDecision - Unanimous (R3)UFC 286 — 18/03/2023

SIMILAR FIGHTERS

Same sport — matched first by weight class, then by nationality, with top records filling any gaps.

Alexandre Pantoja

Alexandre Pantoja

30-6-0BRA
Valentina Shevchenko

Valentina Shevchenko

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Brandon Royval

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Rose Namajunas

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Alexa Grasso

Alexa Grasso

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JJ Aldrich

JJ Aldrich

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Maycee Barber

Maycee Barber

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Brandon Moreno

Brandon Moreno

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