Thomas Petersen

Overview

Thomas Petersen's UFC record is 4-4, and none of his four wins came in the first round. Three went the distance. The fourth ended at 4:47 of the third. His three most decisive defeats all came before the final bell, two by KO/TKO and one by submission.

"The Train" is a Minnesota-born heavyweight fighting out of The Striking Institute. He is 12-5 as a professional across all promotions and 4-4 in the UFC, and he carries a one-fight win streak into his next bout.

A coin-flip record, then. But how he gets there is the interesting part.

UFC Career

Petersen was on Dana White's Contender Series in August 2023, where he beat Chandler Cole by submission in round 2 at 1:08. That fight is not part of his UFC record. His UFC debut came in February 2024, a unanimous decision loss to Jamal Pogues.

He answered with a unanimous decision over Mohammed Usman that July. Then the pattern turned ugly: a first-round KO/TKO loss to Shamil Gaziev at 3:12 in February 2025. He rebounded with a unanimous decision over Don'Tale Mayes, but lost by KO/TKO to Vitor Petrino just 26 seconds into round 3 in October 2025.

A majority decision win over Guilherme Pat followed in April 2026. Then came the shortest night of his UFC run: a first-round submission loss to Valter Walker at 1:32. He closed the year with his only UFC finish, a round 3 KO/TKO of Gabriel Lorenço at 4:47.

He alternates wins and losses. Eight UFC fights, no streak longer than one.

Fighting Style

Thomas Petersen is a hard man to hit and a hard man to take down. He absorbs very few strikes for a UFC fighter, lands his shots at a high clip, and defends takedowns better than most of the roster. His own output is ordinary, and he rarely hunts for submissions. He does look to take opponents down more than most.

His results match that profile. Three of his four UFC wins came by decision, and the other was a TKO in round 3. He tends to work through rounds rather than end fights early, and he has no first-round finishes.

His four losses include two by KO/TKO and one by submission, so even with defensive numbers this good, he has been finished more often than he has gone the distance in defeat. He has one win in a row coming into his next fight.

Notable Wins

• Gabriel Lorenço — KO/TKO, round 3 (4:47), UFC Fight Night: Cortes Acosta vs Walker (2026)
• Guilherme Pat — majority decision, round 3, UFC Fight Night: Moicano vs Duncan (2026)
• Don'Tale Mayes — unanimous decision, round 3, UFC Fight Night: Sandhagen vs Figueiredo (2025)

Quick Facts

• Division: Heavyweight
• UFC record: 4-4
• Professional record (all promotions): 12-5-0
• UFC debut: 2024
• Height: 6'1"
• Reach: 74"
• Team: The Striking Institute
• Born: MN, United States