Fighting style: MMA
Stance: Orthodox
Division: Women's Flyweight
Height: 5' 6"
Reach: 69"
Leg reach: 37.00
Weight: 125 lbs.
Nationality: Irvine, United Kingdom
Age: 24


Recent win streak: 8
Wins by KO: 3
Wins by submission: 2



Significant Strikes Attempted: 307
Significant Strikes Landed: 172


Takedowns Attempted: 16


Casey O’Neill is an up-and-coming MMA fighter based out of Los Angeles, California. He has been fighting in the UFC since 2020 and has quickly made a name for himself as one of the toughest and most talented fighters in the promotion.

O’Neill was born in Seattle, Washington in 1994 and grew up playing football. He was never really a fan of traditional sports, but he found his true love when he discovered Mixed Martial Arts (MMA). When he was 18 years old, O’Neill moved to Los Angeles to pursue his dream of becoming an MMA fighter. After joining several local gyms and training with some experienced coaches, Casey decided it was time to make his move into professional competition.

In 2020, O’Neill won four straight fights on the regional circuit before being signed by the UFC later that year. His debut fight came against Kalin Harris at UFC Fight Night 189 where Casey put on a dominant performance that resulted in a TKO victory with just :22 left in round two. That win earned him “Performance of The Night” honors and helped launch his career into stardom within the organization.

Since then, O’Neill has gone 3-1 as part of the UFC roster and is currently ranked #11 lightweight contender according to Sherdog rankings — putting him on track for a title shot sometime soon if he can continue winning fights at this rate. Outside of competing professionally for MMA promotion’s like Bellator or PFL; Casey also teaches kickboxing classes at various health clubs around Los Angeles which helps him stay active when not training for upcoming fights or managing sponsorships from well known apparel companies like Nike & Adidas .

Casey O’Neil is quickly making waves within the sport thanks not only due to his impressive record inside The Octagon; but also because of how humble & gracious he remains outside it as well — staying true to self while continuing strive towards greatness everyday!

Fight History

Tereza Bleda
Awaiting Outcome
Sat. Aug 17, 2024
UFC 305: Du Plessis vs. Adesanya
Ariane Lipski
Casey O'Neill: Defeated
by Submission in Round 2 @ 1:18
Sat. Dec 16, 2023
UFC 296: Edwards vs. Covington
Jennifer Maia
Casey O'Neill: Defeated
by Unanimous Decision in Round 3
Sat. Mar 18, 2023
UFC 286: Edwards vs. Usman 3
Roxanne Modafferi
Casey O'Neill: Winner
by Split Decision in Round 3
Sat. Feb 12, 2022
UFC 271: Adesanya vs. Whittaker 2
Antonina Shevchenko
Casey O'Neill: Winner
by KO/TKO in Round 2 @ 4:47
Sat. Oct 02, 2021
UFC Fight Night: Santos vs. Walker
Lara Procopio
Casey O'Neill: Winner
by in Round @ 2:54
Sat. Jun 19, 2021
UFC Fight Night: The Korean Zombie vs. Ige


Casey O'neill?
Casey O'Neill is a professional mixed martial artist in the UFC who's also active on Instagram under the handle @kingcaseymma.

Casey O'neill Fenwick?
Casey O'Neill is a professional associated with Fenwick & West LLP.

Casey O'neill Next Fight?
The information about Casey O'Neill's next fight is currently unknown.

Casey O'neill Ufc?
Casey O'neill is a fighter in the Ultimate Fighting Championship (UFC).

Casey O'neill Record?
Casey O'Neill's record in UFC is 9 wins and 1 loss.

Casey O'neill Stunt Double?

Casey O'neill Mma?
Casey O'Neill is a professional Mixed Martial Arts (MMA) fighter.

Casey O'neill Tapology?
Casey O'Neill is an MMA fighter whose page can be found on Tapology.

Casey O'neill Truly?
Casey O'Neill is recognized for sparking a revolution in the beverage industry with the creation of a drink called "Prohibitchin'."

Casey O'neill Under Armour?
Casey O'Neill is a Project Manager for Global Marketing Operations at Under Armour.