Casey O’Neill is a Scottish-born Australian professional mixed martial artist. She competes in the Ultimate Fighting Championship (UFC) women’s flyweight division and is currently ranked #12 in her division.
Her estimated net worth is $500k. Here, we bring Casey O’Neill’s net worth, salary, earnings, career, bio, and more.
Casey O’Neill’s Biography and Career
Casey Cameron O’Neill was born on 7 October 1997 in Irvine, Scotland, United Kingdom. Her father, Cam, was a professional kickboxer.
Casey began training in kickboxing at the age of 4. She moved with her family to Gold Coast, Australia, when she was 10. Later, she transitioned to Muay Thai, Brazilian Jiu-Jitsu, and mixed martial arts.
MMA Career
Casey O’Neill made her professional MMA debut in 2019. She competed in the Eternal MMA and UAE Warriors before joining UFC.
King Casey won the Eternal MMA Strawweight Championship in her debut fight and defended the belt once.
Casey O’Neill is an excellent young prospect in the UFC women’s flyweight division. She boasts a 4-0 UFC record. As of writing, she is #12 in the UFC women’s flyweight division.
King Casey beat the likes of Lara Procopio, Antonina Shevchenko, and Roxanne Modafferi in her last three bouts. She beat Roxanne at UFC 271 in February 2022. She once became the UFC Performance of the Night against Antonina Shevchenko.
Casey O’Neill is scheduled to fight Jennifer Maia in a women’s flyweight bout on the main card of UFC 286 on March 18, 2023.
Casey O’Neill’s Net Worth Details
UFC flyweight Casey O’Neill’s net worth is estimated to be $500k as of 2025. Her primary sources of earnings are her fight purse and incentives.
King Casey’s estimated base salary is close to $30,000 for a fight, depending on her UFC contract, the event, and the opponent.
For her impressive win over Roxanne at UFC 271, she received a $48,500 total payout ($22k to show, $22k win bonus, and $4.5k fight week incentives).
She pocketed $94,000 in payouts for her victory over Antonina Shevchenko, including the $50,000 UFC Performance of the Night bonus.
Moreover, the rising flyweight star Casey earns a considerable chunk from endorsements and brand promotions.
Personal Info
| Full Name | Casey Cameron O’Neill |
| Nickname | King Casey |
| Date of Birth | 7 October 1997 |
| Birth Place | Irvine, Scotland, United Kingdom |
| Nationality | British, Australian |
| Age | 25 |
| Height | 168 cm (5 ft 6 in) |
| Weight | 125 lb (57 kg) |
| Division | Women’s Flyweight |
| Promotion | UFC |
| MMA Record | 9-0 |
| Net Worth | $500k |
| Base Salary | $30,000 (approx.) |
| Relationship Status | In a Relationship |
| Boyfriend | Ty Gwerder |
| @kingcaseymma |
Boyfriend
UFC women’s flyweight Casey is in a relationship. Her boyfriend is Ty Gwerder. Ty is also an MMA fighter and competes in the Bellator MMA. The couple has been together for a few years.
MMA Record
| Total Fights | 9 |
| Wins | 9 |
| Draw | 0 |
| Lost | 0 |
| Win by KO/TKO | 3 |
FAQs
Who is Casey O’Neill?
Casey O’Neill is a Scottish-Australian mixed martial artist who competes in the UFC’s flyweight division. She was born on October 7, 1997, in Irvine, Scotland, and moved to Australia’s Gold Coast when she was 10. She’s known as “King” and is currently ranked #14 in the UFC women’s flyweight rankings.
What’s Casey O’Neill’s fighting record?
As of March 2024, Casey O’Neill’s professional MMA record is 9 wins and 2 losses. She started her career with an impressive 9-fight winning streak before suffering her first two losses in her most recent fights.
How did Casey O’Neill get into MMA?
Casey’s father was a professional kickboxer, and she began training in kickboxing at the age of four. She started training in Brazilian jiu-jitsu at 13 and had her first amateur MMA fight at 15. After losing her first two amateur fights, she took a break to improve her skills, then returned to win five consecutive amateur bouts before turning pro at 21.
What’s Casey O’Neill’s fighting style?
O’Neill is known for her well-rounded skills. She has a strong striking background from her kickboxing training and is also skilled in grappling, holding a brown belt in Brazilian jiu-jitsu. She’s particularly known for her aggressive style and ability to finish fights.
What are some of Casey O’Neill’s most notable fights?
Some of O’Neill’s standout performances include her wins over Shana Dobson (her UFC debut), Antonina Shevchenko (which earned her a Performance of the Night bonus), and Roxanne Modafferi. Her fight against Jennifer Maia at UFC 286, although a loss, was also a notable bout.
Has Casey O’Neill ever been a champion?
While O’Neill hasn’t won a UFC championship, she was the Eternal MMA Strawweight Champion before joining the UFC. She’s also won belts in Muay Thai and Boxing in her native Australia.
Where does Casey O’Neill train?
O’Neill has trained at various gyms throughout her career. She spent time at Tiger Muay Thai in Phuket, Thailand, and is currently associated with Xtreme Couture in Las Vegas.
What’s an interesting fact about Casey O’Neill?
Despite her nickname “King,” O’Neill used to be afraid of spiders. To overcome this fear, she started collecting tarantulas and, at one point, had over 200 of them as pets!
What challenges has Casey O’Neill faced in her career?
O’Neill has faced several challenges, including losing her first two amateur fights and balancing a job as a barista with her training early in her career. She also had to withdraw from a scheduled fight against Jessica Eye in 2022 due to a torn ACL.
What’s next for Casey O’Neill?
As of the latest information, Casey O’Neill is scheduled to face Tereza Bleda on August 18, 2024, at UFC 305. After suffering her first two professional losses, O’Neill will be looking to return to her winning ways and climb the rankings in the competitive flyweight division.
