Sean O'Malley

Overview

Seven of his twelve UFC wins came by knockout, and not one by submission. Sean O'Malley is a bantamweight out of MMA LAB in Glendale, Arizona, with a 12-3 UFC record, one no contest, and a stand-up game that grades out far better than the UFC average almost everywhere you look.

His overall professional record across all promotions is 20-3-0 with one no contest. The UFC portion is 12-3, and the 12 wins include four over elite-tier opponents: three by decision and one by stoppage.

He carries a two-fight win streak into his next fight.

UFC Career

O'Malley's first win on the way in wasn't a UFC fight at all: he stopped Alfred Khashakyan in round 1 at Dana White's Contender Series 1.2, a stoppage at 4:14. His UFC debut followed on The Ultimate Fighter: A New World Champion Finale, a unanimous decision over Terrion Ware. A second decision win over Andre Soukhamthath at UFC 222 followed.

Then came a gap of two years, and a different pace. Jose Quinonez fell in round 1 at UFC 248, Eddie Wineland in round 1 at UFC 250. Both finishes landed in under two and a half minutes.

The first loss arrived at UFC 252: Marlon Vera stopped him in round 1 at 4:40. He answered with three straight knockouts, Thomas Almeida and Kris Moutinho in round 3 and Raulian Paiva in round 1, then took a no contest against Pedro Munhoz at UFC 276.

The stretch that defines his career came next. He beat Petr Yan by split decision at UFC 280, then headlined UFC 292 and stopped Aljamain Sterling in round 2 at 0:51. Both Yan and Sterling are tagged elite by our model. He then headlined UFC 299 in a five-round fight and beat Vera by unanimous decision, the rematch of his first UFC loss.

Two losses to Merab Dvalishvili, another elite-tier opponent, followed: a five-round unanimous decision at UFC 306, then a round 3 submission at UFC 316. After that, he beat Song Yadong by unanimous decision at UFC 324 and stopped Aiemann Zahabi in round 2 at UFC Freedom 250.

Four wins over elite opponents. Three losses, two of them to the same man.

Fighting Style

O'Malley is a busy, accurate striker who is hard to hit. He lands a lot and wastes little, and he takes less in return than most fighters in the UFC.

The ground game is not part of his offense. He rarely shoots for takedowns and almost never hunts for submissions, and he has no submission wins. He is tougher to take down than most, though one of his three UFC losses came by submission.

His finishing pattern is consistent. All seven of his UFC knockout wins came inside the distance, with three in round 1, two in round 2 and two in round 3. He gets there across all three rounds, not just in the opening minutes.

Notable Wins

• Aljamain Sterling — KO/TKO, round 2 (0:51), UFC 292 (2023)
• Petr Yan — split decision, round 3, UFC 280 (2022)
• Marlon Vera — unanimous decision, round 5, UFC 299 (2024)
• Song Yadong — unanimous decision, round 3, UFC 324 (2026)

Quick Facts

• Division: Bantamweight
• UFC record: 12-3, 1 no contest
• Professional record (all promotions): 20-3-0, 1 no contest
• UFC debut: 2017
• Stance: Switch
• Height / reach: 5'11" / 72"
• Team: MMA LAB, Glendale, AZ
• Born: Helena, MT, United States