Standout achievements
Nicholas O'Brien is an American mixed martial artist with a professional record of 11-5 across 16 bouts. They've won 5 by KO/TKO, 2 by submission and 4 by decision — a 64 % finish rate. Most wins come by KO/TKO. Currently on a 3-fight win streak. Last competed April 2026 (active). Has fought most often in United States (18 bouts).
Fight locations (8 venues)
Career timeline — fights by year
Frequently asked
What is Nicholas O'Brien's MMA record?
Nicholas O'Brien has a professional MMA record of 11-5 — 5 wins by KO/TKO, 2 by submission, 4 by decision.
How does Nicholas O'Brien usually win?
They most often win by KO/TKO (5 of 11 wins).
How does Nicholas O'Brien usually lose?
Most of Nicholas O'Brien's losses come by submission (3 of 5).
Is Nicholas O'Brien still active?
Nicholas O'Brien last competed in April 2026, and is considered active (no bout in over two years).
What is Nicholas O'Brien's fastest finish?
KO/TKO of Antonio Santiago in 0:10 (Rd 1) at Primal Fight League - Red, White & Bruised.
Where is Nicholas O'Brien from?
Nicholas O'Brien is a American mixed martial artist.
What is Nicholas O'Brien's longest MMA win streak?
Nicholas O'Brien's longest winning run on record is 4 straight victories.
Where does Nicholas O'Brien rank in MMA?
Nicholas O'Brien sits at #10,036 of 32,631 fighters in the Fight Forensics global MMA rankings.
Pro MMA (16)
Amateur (2)
Amateur bouts — not counted toward the pro record.