Michał Oleksiejczuk

Michał Oleksiejczuk (born February 22, 1995) is a Polish mixed martial artist. A professional since 2014, he was the former Thunderstrike Fight League Light heavyweight champion in Poland. He currently competes in the middleweight division of the Ultimate Fighting Championship (UFC).

Background Michal played handball before taking up martial arts. Oleksiejczuk has a younger brother named Cezary, who is also a professional mixed martial artist. During this time Oleksiejczuk won the Wenglorz Fight Cup tournament, as well as the thunderstrike fight league light heavyweight championship.

Ultimate Fighting Championship Oleksiejczuk was expected to have made his UFC debut to face Ion Cuțelaba on November 4, 2017, at UFC 217, replacing injured Gadzhimurad Antigulov. In turn after the weigh-ins, Cuțelaba was pulled from the event by USADA due to a potential Anti-Doping Policy violation stemming from its investigation into voluntary disclosures by Cuțelaba during an out-of-competition sample collections on October 18 and October 19. Cuțelaba was provisionally suspended and the bout was scrapped.

Oleksiejczuk's UFC debut was finally set on December 30, 2017, facing Khalil Rountree Jr. and replacing injured Gökhan Saki, at UFC 219. However, after the fight, it was revealed that Oleksiejczuk had tested positive for clomiphene, an anti-estrogenic substance. As a result, the Nevada Athletic Commission (NAC) officially overturned the result of the fight to a no contest and Oleksiejczuk received one year suspension by USADA.

Oleksiejczuk returned to octagon one year later to face Gian Villante on February 23, 2019, at UFC Fight Night: Błachowicz vs. Santos. He won the fight via TKO due to a body punch early in the first round. This win earned him the Performance of the Night award.

Oleksiejczuk faced Gadzhimurad Antigulov on April 20, 2019, replacing Roman Dolidze, at UFC Fight Night: Overeem vs. Oleinik. Oleksiejczuk won the fight via knockout in the first round.

Oleksiejczuk faced Ovince Saint Preux on September 28, 2019, at UFC on ESPN+ 18. He lost the fight via submission due to a Von Flue choke in the second round.

Oleksiejczuk faced Jimmy Crute on February 23, 2020, at UFC Fight Night 168. He lost the fight via a kimura submission in the first round.

Oleksiejczuk faced Modestas Bukauskas on March 27, 2021, at UFC 260. He won a close bout via split decision.

Oleksiejczuk faced Shamil Gamzatov on October 30, 2021, at UFC 267. He won the bout via TKO in the first round.

Oleksiejczuk faced Dustin Jacoby on March 5, 2022, at UFC 272. He lost the fight via unanimous decision.

Drop down to middleweight Oleksiejczuk faced Sam Alvey on August 6, 2022, at UFC on ESPN 40. He won the fight via technical knockout in round one.

Oleksiejczuk was scheduled to face Albert Duraev, replacing injured Bruno Silva, on December 17, 2022, at UFC Fight Night 216. In turn, Duraev was forced to withdraw for undisclosed reasons and was replaced by Cody Brundage. Oleksiejczuk won the fight via knockout in round one. This win earned him the Performance of the Night award.

Oleksiejczuk faced Caio Borralho on April 29, 2023, at UFC on ESPN: Song vs. Simón. He lost the fight via rear-naked choke in round two.

Oleksiejczuk faced Chidi Njokuani at UFC Fight Night 225 on August 26, 2023. He won by first-round ground and pound technical knockout, which earned him a Performance of the Night award.

Oleksiejczuk faced Michel Pereira on March 9, 2024, at UFC 299. He lost the bout in the first round by rear-naked choke submission.

Oleksiejczuk faced Kevin Holland on June 1, 2024, at UFC 302. After knocking Holland down, Oleksiejczuk lost by an armbar submission in the first round.

Oleksiejczuk faced Sharabutdin Magomedov on August 3, 2024 at UFC on ABC 7. He lost the fight by unanimous decision. This fight earned him a Fight of the Night award.

Oleksiejczuk faced Sedriques Dumas on April 12, 2025 at UFC 314. He won the fight by technical knockout in the first round.

Oleksiejczuk faced Gerald Meerschaert on August 16, 2025, at UFC 319. He won the fight via technical knockout in round one.

Oleksiejczuk faced Marc-André Barriault on February 7, 2026, at UFC Fight Night 266. He won the fight by unanimous decision. This fight earned him a $100,000 Fight of the Night award.

Oleksiejczuk faced Abusupiyan Magomedov on June 27, 2026 at UFC Fight Night 280. The bout was initially reported as the main event, but was changed for undisclosed reasons. Oleksiejczuk lost the fight via a guillotine choke submission in the first round.

Personal life Oleksiejczuk is married to his wife Ewelina they have 2 daughters together.

Oleksiejczuk has befriended his former opponent Caio Borralho. In 2025 Borralho invited him to the fighting nerds gym in Brazil to help him train for his fight at UFC 314. Since then Oleksiejczuk has continued to train with the fighting nerds.

Championships and accomplishments Mixed martial arts Ultimate Fighting Championship Fight of the Night (Two times) Tied (Terrance McKinney, Francis Ngannou, Joe Lauzon and Donald Cerrone) for sixth most first-round finishes in UFC history (8) Most knockdowns landed in the shortest span in a bout (3 knockdowns in 44 seconds) UFC Honors Awards 2023: Fan's Choice Comeback of the Year Nominee Thunderstrike Fight League Thunderstrike Fight League Light heavyweight Champion (One time) Two Successful Title Defenses

Mixed martial arts record Loss

Abusupiyan Magomedov Submission (guillotine choke) UFC Fight Night: Fiziev vs. Torres

Baku, Azerbaijan Win

Marc-André Barriault Decision (unanimous) UFC Fight Night: Bautista vs. Oliveira

Las Vegas, Nevada, United States Win

Gerald Meerschaert TKO (punches) UFC 319

Chicago, Illinois, United States Win

Sedriques Dumas TKO (punches and elbows) UFC 314

Miami, Florida, United States Loss

Sharabutdin Magomedov Decision (unanimous) UFC on ABC: Sandhagen vs. Nurmagomedov

Abu Dhabi, United Arab Emirates Loss

Kevin Holland Technical Submission (armbar) UFC 302

Newark, New Jersey, United States Loss

Michel Pereira Technical Submission (rear-naked choke) UFC 299

Miami, Florida, United States Win

Chidi Njokuani TKO (punches) UFC Fight Night: Holloway vs. The Korean Zombie

Kallang, Singapore Loss

Caio Borralho Submission (rear-naked choke) UFC on ESPN: Song vs. Simón

Las Vegas, Nevada, United States Win

Cody Brundage KO (punches) UFC Fight Night: Cannonier vs. Strickland

Las Vegas, Nevada, United States Win

Sam Alvey TKO (punches) UFC on ESPN: Santos vs. Hill

Las Vegas, Nevada, United States Loss

Dustin Jacoby Decision (unanimous) UFC 272

Las Vegas, Nevada, United States Win

Shamil Gamzatov TKO (punches) UFC 267

Abu Dhabi, United Arab Emirates Win

Modestas Bukauskas Decision (split) UFC 260

Las Vegas, Nevada, United States Loss

Jimmy Crute Submission (kimura) UFC Fight Night: Felder vs. Hooker

Auckland, New Zealand Loss

Ovince Saint Preux Submission (Von Flue choke) UFC Fight Night: Hermansson vs. Cannonier

Copenhagen, Denmark Win

Gadzhimurad Antigulov KO (punch) UFC Fight Night: Overeem vs. Oleinik

Saint Petersburg, Russia Win

Gian Villante TKO (punches) UFC Fight Night: Błachowicz vs. Santos

Prague, Czech Republic NC

Khalil Rountree Jr. NC (overturned) UFC 219

Las Vegas, Nevada, United States Win

Riccardo Nosiglia KO (punches) Fight Exclusive Night 17

Gdynia, Poland Win

Charles Andrade KO (punch) Thunderstrike Fight League 11

Kraśnik, Poland Win

Łukasz Klinger TKO (punches) Thunderstrike Fight League 10

Lublin, Poland Win

Wojciech Janusz Decision (unanimous) Fight Exclusive Night 12

Wrocław, Poland Win

Łukasz Borowski Submission (rear-naked choke) Thunderstrike Fight League 8

Lublin, Poland Win

Michal Dobiaš KO (kick to the body)

Win

Andrejs Zozulja KO (punches)

Win

Tomasz Janiszewski TKO (strikes) Thunderstrike Fight League 7

Kraśnik, Poland Win

Seweryn Kirschhiebel TKO (corner stoppage) Thunderstrike Fight League 6

Lublin, Poland Loss

Marcin Wójcik TKO (punches) PLMMA 44

Bieżuń, Poland Win

Norbert Piskorski TKO (leg injury) Thunderstrike Fight League 5

Lublin, Poland Loss

Jan Kwiatoń Submission (triangle choke) Thunderstrike Fight League 4

Łęczna, Poland Win

Mateusz Gola Decision (unanimous) Tymex Fight Night

Pionki, Poland Win

Rajmund Flejmer Decision (unanimous) Vale Tudo Cup 1

Puławy, Poland