Standout achievements
John O'Brien is mixed martial artist with a professional record of 9-3 across 12 bouts. They've won 2 by KO/TKO, 4 by submission and 3 by decision — a 67 % finish rate. Most wins come by submission. Currently on a 2-fight win streak. Last competed October 2024 (active). Has fought most often in United States (13 bouts).
Fight locations (3 venues)
Career timeline — fights by year
Frequently asked
What is John O'Brien's MMA record?
John O'Brien has a professional MMA record of 9-3 — 2 wins by KO/TKO, 4 by submission, 3 by decision.
How does John O'Brien usually win?
They most often win by submission (4 of 9 wins).
How does John O'Brien usually lose?
Most of John O'Brien's losses come by decision (2 of 3).
Is John O'Brien still active?
John O'Brien last competed in October 2024, and is considered active (no bout in over two years).
What is John O'Brien's fastest finish?
submission of Wayne Collier in 0:39 (Rd 1) at Blue Corner Promotions - Ultimate Blue Corner Battles.
What is John O'Brien's longest MMA win streak?
John O'Brien's longest winning run on record is 4 straight victories.
Where does John O'Brien rank in MMA?
John O'Brien sits at #8,063 of 32,631 fighters in the Fight Forensics global MMA rankings.
Pro MMA (12)
Amateur (1)
Amateur bouts — not counted toward the pro record.