Brian Kelleher

Kelleher currently competes in the Bantamweight division for the Ultimate Fighting Championship (UFC). A professional competitor since 2011, Kelleher has also competed for Bellator and CES MMA.

Kelleher was born on August 19, 1986, in Selden, New York, the son of Matt and Jen Kelleher. Kelleher has an older brother Keith and a younger brother Mak who is also a professional mixed martial artist. Kelleher competed in a variety of sports from a young age including ice hockey, soccer and bowling. He later began combat sport training in 2007.

Ultimate Fighting Championship

Kelleher made his promotional debut against Iuri Alcântara on short notice at UFC 212 on June 3, 2017. He won the fight via submission due to a guillotine choke in the first round and was awarded a Performance of the Night bonus.

Kelleher next faced Marlon Vera on July 22, 2017, at UFC on Fox 25. He lost the fight via armbar submission in the first round.

Kelleher faced Damian Stasiak on October 21, 2017, at UFC Fight Night 118. He won the fight via technical knockout in the third round. This win earned him the Fight of the Night award.

Kelleher faced Renan Barão on February 24, 2018, at UFC on Fox 28. He won the fight by unanimous decision.

Kelleher faced John Lineker on May 12, 2018, at UFC 224. He lost the fight via knockout in the third round.

Kelleher was originally scheduled to face Domingo Pilarte on November 3, 2018, at UFC 230. Pilarte was forced to withdraw from the bout, citing an injury, and Kelleher is now slated to face Montel Jackson. At the weigh-ins, Kelleher weight at 137 pounds, 1 pound over the bantamweight non-title fight limit of 136. He was fined 20 percent of his purse, which went to his opponent Jackson. On November 3, it was reported that Kelleher withdrew from the bout due to illness and thus the fight was cancelled. The pairing was left intact and rescheduled for December 29, 2018, at UFC 232. At the weigh-ins, Jackson weighed in at 137 lbs, 1 pound over the non-title fight bantamweight limit of 136 lbs. Jackson was fined 20 percent of his purse to Kelleher and the fight proceeded at catchweight. Kelleher lost the fight via submission in the first round.

Kelleher was scheduled to face Mitch Gagnon on May 4, 2019, at UFC Fight Night 150. However, Kelleher pulled out of the fight on April 10, citing an injury, and he was replaced by promotional newcomer Cole Smith.

As the last fight of his prevailing contract, Kelleher faced Ode' Osbourne at UFC 246 on January 18, 2020. He won the fight via a submission in the first round. This win earned him a Performance of the Night award.

After negotiating a new contract, Kelleher faced Hunter Azure in a featherweight contest on May 13, 2020, at UFC Fight Night: Smith vs. Teixeira. He won the fight via knockout in round two.

Kelleher faced Cody Stamann on June 6, 2020, at UFC 250. He lost the bout via unanimous decision.

Kelleher was scheduled to face Ricky Simón on September 5, 2020, at UFC Fight Night 176. However, Simón's cornerman tested positive for COVID-19 and he was forced to withdraw from the event, and he was replaced by promotional newcomer Kevin Natividad. In turn, Natividad was pulled from the matchup on the day of the event due to undisclosed reasons, and he was replaced by fellow newcomer Ray Rodriguez, who weighed in as a backup. Kelleher won the fight via a guillotine choke in round one. This win earned him a Performance of the Night award.

The bout against Simón was rescheduled on January 16, 2021, at UFC on ABC 1. However, Kelleher also tested positive on January 1 and was pulled from the bout. He was replaced by newcomer Gaetano Pirello and the bout will take place four days later at UFC on ESPN: Chiesa vs. Magny.

The bout between Kelleher and Ricky Simón was rebooked for the third time and took place at UFC 258 on February 13, 2021. Kelleher lost the fight via unanimous decision.

Kelleher faced Domingo Pilarte on August 21, 2021, at UFC on ESPN: Cannonier vs. Gastelum. He won the fight via unanimous decision.

Kelleher was scheduled to face Saidyokub Kakhramonov on January 15, 2022, at UFC on ESPN 32. However, Kakhramonov withdrew from the bout for undisclosed reason and he was replaced by Kevin Croom. He won the fight via unanimous decision after knocking Croom down once in the first round.

As the first bout of his new four-fight contract, Kelleher faced Umar Nurmagomedov on March 5, 2022, at UFC 272. He lost the fight via a rear naked choke in round one.

Kelleher faced Mario Bautista on June 25, 2022, at UFC on ESPN 38. He lost the fight via a rear-naked choke submission in the first round.

Kelleher was scheduled to face Journey Newson on April 29, 2023, at UFC on ESPN: Song vs. Simón. However, Kelleher pulled out of his bantamweight bout against Journey Newson. He was replaced by Marcus McGhee.

Kelleher faced former UFC Bantamweight Champion Cody Garbrandt on December 16, 2023 at UFC 296. He lost the fight via knockout in the first round.

• Ultimate Fighting Championship
  • Performance of the Night (Three times) vs. Iuri Alcântara, Ode' Osbourne, and Ray Rodriguez
  • Fight of the Night (Two times) vs. Damian Stasiak and Hunter Azure
• Ring of Combat
  • Bantamweight Championship (One time; former)
    • One successful title defense

• List of current UFC fighters
• List of male mixed martial artists