Topzle Updated: Wikipedia source
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).
| 31 matches | 21 wins | 9 losses |
| By knockout | 16 | 1 |
| By submission | 1 | 6 |
| By decision | 4 | 2 |
| No contests | 1 | |
| Res. | Record | Opponent | Method | Event | Date | Round | Time | Location | Notes |
| Win | 21–9 (1) | Gerald Meerschaert | TKO (punches) | UFC 319 | August 16, 2025 | 1 | 3:03 | Chicago, Illinois, United States | |
| Win | 20–9 (1) | Sedriques Dumas | TKO (punches and elbows) | UFC 314 | April 12, 2025 | 1 | 2:49 | Miami, Florida, United States | |
| Loss | 19–9 (1) | Sharabutdin Magomedov | Decision (unanimous) | UFC on ABC: Sandhagen vs. Nurmagomedov | August 3, 2024 | 3 | 5:00 | Abu Dhabi, United Arab Emirates | Fight of the Night. |
| Loss | 19–8 (1) | Kevin Holland | Technical Submission (armbar) | UFC 302 | June 1, 2024 | 1 | 1:34 | Newark, New Jersey, United States | |
| Loss | 19–7 (1) | Michel Pereira | Technical Submission (rear-naked choke) | UFC 299 | March 9, 2024 | 1 | 1:01 | Miami, Florida, United States | |
| Win | 19–6 (1) | Chidi Njokuani | TKO (punches) | UFC Fight Night: Holloway vs. The Korean Zombie | August 26, 2023 | 1 | 4:16 | Kallang, Singapore | Performance of the Night. |
| Loss | 18–6 (1) | Caio Borralho | Submission (rear-naked choke) | UFC on ESPN: Song vs. Simón | April 29, 2023 | 2 | 2:49 | Las Vegas, Nevada, United States | |
| Win | 18–5 (1) | Cody Brundage | KO (punches) | UFC Fight Night: Cannonier vs. Strickland | December 17, 2022 | 1 | 3:16 | Las Vegas, Nevada, United States | Performance of the Night. |
| Win | 17–5 (1) | Sam Alvey | TKO (punches) | UFC on ESPN: Santos vs. Hill | August 6, 2022 | 1 | 1:56 | Las Vegas, Nevada, United States | Return to Middleweight. |
| Loss | 16–5 (1) | Dustin Jacoby | Decision (unanimous) | UFC 272 | March 5, 2022 | 3 | 5:00 | Las Vegas, Nevada, United States | |
| Win | 16–4 (1) | Shamil Gamzatov | TKO (punches) | UFC 267 | October 30, 2021 | 1 | 3:31 | Abu Dhabi, United Arab Emirates | |
| Win | 15–4 (1) | Modestas Bukauskas | Decision (split) | UFC 260 | March 27, 2021 | 3 | 5:00 | Las Vegas, Nevada, United States | |
| Loss | 14–4 (1) | Jimmy Crute | Submission (kimura) | UFC Fight Night: Felder vs. Hooker | February 23, 2020 | 1 | 3:29 | Auckland, New Zealand | |
| Loss | 14–3 (1) | Ovince Saint Preux | Submission (Von Flue choke) | UFC Fight Night: Hermansson vs. Cannonier | September 28, 2019 | 2 | 2:14 | Copenhagen, Denmark | |
| Win | 14–2 (1) | Gadzhimurad Antigulov | KO (punch) | UFC Fight Night: Overeem vs. Oleinik | April 20, 2019 | 1 | 0:44 | Saint Petersburg, Russia | |
| Win | 13–2 (1) | Gian Villante | TKO (punches) | UFC Fight Night: Błachowicz vs. Santos | February 23, 2019 | 1 | 1:34 | Prague, Czech Republic | Performance of the Night. |
| NC | 12–2 (1) | Khalil Rountree Jr. | NC (overturned) | UFC 219 | December 30, 2017 | 3 | 5:00 | Las Vegas, Nevada, United States | Originally a unanimous decision win for Oleksiejczuk; overturned after he tested positive for clomiphene. |
| Win | 12–2 | Riccardo Nosiglia | KO (punches) | Fight Exclusive Night 17 | May 12, 2017 | 1 | 1:40 | Gdynia, Poland | Fight of the Night. |
| Win | 11–2 | Charles Andrade | KO (punch) | Thunderstrike Fight League 11 | April 1, 2017 | 1 | 1:58 | Kraśnik, Poland | Defended the TFL Light Heavyweight Championship. |
| Win | 10–2 | Łukasz Klinger | TKO (punches) | Thunderstrike Fight League 10 | November 19, 2016 | 1 | N/A | Lublin, Poland | Defended the TFL Light Heavyweight Championship. |
| Win | 9–2 | Wojciech Janusz | Decision (unanimous) | Fight Exclusive Night 12 | May 20, 2016 | 3 | 5:00 | Wrocław, Poland | |
| Win | 8–2 | Łukasz Borowski | Submission (rear-naked choke) | Thunderstrike Fight League 8 | January 16, 2016 | 2 | 3:39 | Lublin, Poland | Won the vacant TFL Light Heavyweight Championship. |
| Win | 7–2 | Michal Dobiaš | KO (kick to the body) | Wenglorz Fight Cup 6 | September 26, 2015 | 2 | N/A | Lidzbark Warmiński, Poland | Catchweight (198 lb) bout. Won the Wenglorz Fight Cup Tournament. |
| Win | 6–2 | Andrejs Zozulja | KO (punches) | 1 | N/A | Catchweight (198 lb) bout. | |||
| Win | 5–2 | Tomasz Janiszewski | TKO (strikes) | Thunderstrike Fight League 7 | May 2, 2015 | 2 | 4:38 | Kraśnik, Poland | |
| Win | 4–2 | Seweryn Kirschhiebel | TKO (corner stoppage) | Thunderstrike Fight League 6 | January 24, 2015 | 2 | 2:25 | Lublin, Poland | |
| Loss | 3–2 | Marcin Wójcik | TKO (punches) | PLMMA 44 | November 21, 2014 | 1 | 2:12 | Bieżuń, Poland | Light Heavyweight debut. |
| Win | 3–1 | Norbert Piskorski | TKO (leg injury) | Thunderstrike Fight League 5 | June 20, 2014 | 1 | N/A | Lublin, Poland | Catchweight (212 lb) bout. |
| Loss | 2–1 | Jan Kwiatoń | Submission (triangle choke) | Thunderstrike Fight League 4 | May 17, 2014 | 1 | 1:53 | Łęczna, Poland | Catchweight (198 lb) bout. |
| Win | 2–0 | Mateusz Gola | Decision (unanimous) | Tymex Fight Night | February 8, 2014 | 3 | 5:00 | Pionki, Poland | Catchweight (198 lb) bout. |
| Win | 1–0 | Rajmund Flejmer | Decision (unanimous) | Vale Tudo Cup 1 | January 11, 2014 | 2 | 5:00 | Puławy, Poland | Middleweight debut; Oleksiejczuk missed weight (191.8 lb). |