0-1
Pro W–L
John O'Sullivan is mixed martial artist with a professional record of 0-1 across 1 bouts. Last competed August 2025 (active).
Finish rate
0 %
Wins by
0 KO · 0 SUB · 0 DEC
Usually loses by
submission
Fastest loss
7:16 (Rd 2)
vs Vadim Beregoi
Last fought
Aug 2025 · Active
Frequently asked
What is John O'Sullivan's MMA record?
John O'Sullivan has a professional MMA record of 0-1.
How does John O'Sullivan usually lose?
Most of John O'Sullivan's losses come by submission (1 of 1).
Is John O'Sullivan still active?
John O'Sullivan last competed in August 2025, and is considered active (no bout in over two years).