Michał Oleksiejczuk Record: 22-10-0

Light heavyweight run and a knockout reputation

Oleksiejczuk announced himself as a finisher in 2019, blasting through Gian Villante with first-round punches at UFC on ESPN+ 3 and then starching Gadzhimurad Antigulov with a one-punch knockout weeks later. The light heavyweight division also exposed his grappling vulnerabilities, however: he was submitted by Ovince St. Preux via Von Flue choke later in 2019 and tapped to a first-round kimura from Jimmy Crute in early 2020. He steadied himself with a split-decision win over Modestas Bukauskas in 2021 and a first-round stoppage of unbeaten Shamil Gamzatov at UFC 267.

Middleweight chapter

After a 2022 decision loss to Dustin Jacoby, Oleksiejczuk dropped to middleweight and his power followed. He knocked out veteran Sam Alvey and Cody Brundage in the first round, and flattened Chidi Njokuani inside a round in 2023. The submission flaws resurfaced during a difficult stretch in 2023 and 2024, with rear-naked-choke losses to Caio Borralho and Michel Pereira, a technical armbar defeat to Kevin Holland, and a decision loss to unbeaten Shara Magomedov. He responded with the best run of his middleweight tenure: a first-round TKO of Sedriques Dumas at UFC 314, a first-round finish of grappling veteran Gerald Meerschaert at UFC 319, and a decision win over Marc-André Barriault in February 2026 that pushed him to a three-fight winning streak.

Fighting style

Oleksiejczuk is a pressure-forward knockout artist with a 77% finish rate, and 16 of his 22 wins have come by KO or TKO. His left hand is the headline weapon, and he hunts the finish from the opening bell, which makes him one of the more reliably violent fighters in his division. The flip side has been written into his record: the majority of his losses have come by submission, a pattern that has repeatedly punished his aggression when opponents drag him into scrambles. His move to Brazil and his recent winning run suggest a fighter working hard to plug those gaps without dulling his offensive edge.

Career highlights

• Two-time Polish amateur champion — built an elite amateur base in Poland before turning pro, the foundation for one of the country’s most feared knockout punchers.
• 16 wins by knockout — a 77% finish rate and a long list of first-round stoppages that have made him a regular on highlight reels.
• Middleweight resurgence — rebounded from a four-fight skid with three straight victories, including finishes of Sedriques Dumas and Gerald Meerschaert.