Rise to Success: Career Highlights of Sean O'Malley (fighter)

How Sean O'Malley (fighter) built a successful career. Explore key moments that defined the journey.

Sean O'Malley is an American professional mixed martial artist competing in the UFC's Bantamweight division. He is the former UFC Bantamweight Champion and currently ranked #1 in the division as of September 17, 2024. O'Malley is a prominent figure in the UFC.

Sections (2)

Full Timeline Career & Achievements

December 1, 2017: Promotional Debut at The Ultimate Fighter 26 Finale

On December 1, 2017, Sean O'Malley made his promotional debut against Terrion Ware at The Ultimate Fighter 26 Finale, winning the fight via unanimous decision.

March 3, 2018: Fight Against Andre Soukhamthath at UFC 222

On March 3, 2018, Sean O'Malley fought Andre Soukhamthath at UFC 222, winning by unanimous decision despite injuring his foot in the third round. Both fighters earned a Fight of the Night bonus.

October 6, 2018: Scheduled Fight at UFC 229

On October 6, 2018, Sean O'Malley was expected to fight José Alberto Quiñónez at UFC 229, but he withdrew from the fight on September 30 due to a potential Anti-Doping Policy violation.

March 2019: Eligibility to Return

In March 2019, Sean O'Malley became eligible to return to fighting after serving a six-month suspension by the NSAC for testing positive for ostarine.

June 21, 2019: Withdrawal from UFC 239

On June 21, 2019, Sean O'Malley announced his withdrawal from the bout against Marlon Vera at UFC 239, due to a failed test for ostarine.

July 6, 2019: Scheduled Fight at UFC 239

On July 6, 2019, Sean O'Malley was scheduled to face Marlon Vera at UFC 239. However, O'Malley withdrew from the bout on June 21 due to a failed test for ostarine.

December 12, 2019: Quintet: Ultra Competition

On December 12, 2019, Sean O'Malley competed at Quintet: Ultra as a member of Team UFC. He submitted Takanori Gomi but was submitted by Héctor Lombard. Team UFC won the tournament.

March 7, 2020: Fight Against José Alberto Quiñónez at UFC 248

On March 7, 2020, Sean O'Malley fought José Alberto Quiñónez at UFC 248, winning via TKO in the first round and earning his first Performance of the Night award.

June 6, 2020: Fight Against Eddie Wineland at UFC 250

On June 6, 2020, Sean O'Malley faced Eddie Wineland at UFC 250, winning via one-punch knockout in the first round and earning the Performance of the Night award.

August 15, 2020: Fight Against Marlon Vera at UFC 252

On August 15, 2020, Sean O'Malley fought Marlon Vera at UFC 252, losing via TKO in the first round, marking the first defeat of his career. He was later diagnosed with drop foot from a leg kick by Vera.

September 20, 2020: Grappling Industries Phoenix

On September 20, 2020, Sean O'Malley entered the 155lbs Advanced No-gi division of Grappling Industries Phoenix, placing third in a seven-man division, losing only to Robert Degle.

December 20, 2020: SUG Grappling Match Challenge

On December 20, 2020, Chael Sonnen put out an open challenge on behalf of O'Malley for his promotion's event, which was answered by James Gallagher. O'Malley reportedly declined the grappling match challenge.

March 27, 2021: Fight Against Thomas Almeida at UFC 260

On March 27, 2021, Sean O'Malley faced Thomas Almeida at UFC 260, winning via knockout in the third round, earning the Performance of the Night award, despite a moment where O'Malley thought Almeida was knocked unconscious in the first round.

July 10, 2021: Fight Against Kris Moutinho at UFC 264

On July 10, 2021, Sean O'Malley fought Kris Moutinho at UFC 264, winning via TKO in round three and earning the Fight of the Night award, after Louis Smolka pulled out of the fight due to injury.

December 11, 2021: Fight Against Raulian Paiva at UFC 269

On December 11, 2021, Sean O'Malley fought Raulian Paiva at UFC 269, winning via TKO in round one and earning his fourth Performance of the Night bonus award.

July 2, 2022: Fight Against Pedro Munhoz at UFC 276

On July 2, 2022, Sean O'Malley fought Pedro Munhoz at UFC 276. The fight was declared a no contest after O'Malley accidentally poked Munhoz in the eye, rendering him unable to continue early in the second round.

October 22, 2022: Fight Against Petr Yan at UFC 280

On October 22, 2022, Sean O'Malley fought Petr Yan at UFC 280, winning the bout via split decision. The result was seen as highly controversial, receiving the Fight of the Night bonus and the "2022 Robbery of the Year Award" by Sherdog website editors.

August 19, 2023: UFC Bantamweight Championship at UFC 292

On August 19, 2023, Sean O'Malley faced Aljamain Sterling for the UFC Bantamweight Championship at UFC 292, winning the title by second-round technical knockout and earning another Performance of the Night bonus.

March 9, 2024: Title Defense at UFC 299

On March 9, 2024, Sean O'Malley defended his title against Marlon Vera in a rematch at UFC 299, winning via unanimous decision and earning his sixth Performance of the Night bonus award.

September 14, 2024: Title Defense at UFC 306

On September 14, 2024, Sean O'Malley faced Merab Dvalishvili at UFC 306 for his second title defense, losing the fight by unanimous decision.

September 17, 2024: UFC Bantamweight Rankings

On September 17, 2024, Sean O'Malley was ranked #1 in the UFC bantamweight rankings.

June 7, 2025: Championship Rematch at UFC 316

On June 7, 2025, Sean O'Malley faced Merab Dvalishvili in a championship rematch at UFC 316, losing the fight via a north-south choke submission at the end of the third round.