Marcin Prachnio (17-9, 12) was born in Warsaw, Poland on July 14, 1988. At the age of 24 years on July 13, 2013, he made his professional MMA debut against Tomas Siaucila, winning the fight via 1st-round KO.
On February 24, 2018, 29-year old Marcin Prachnio made his UFC debut on his 16th professional MMA fight at UFC on Fox: Emmett vs. Stephens against a 31-year old Sam Alvey but lost the fight via KO in the 1st round.
Prachnio's last fight was a 1st-round submission loss to Jimmy Crute at UFC 318 at age 37 on July 19, 2025. He is on a 2-fight losing streak.
He has fought 11 times in the UFC, and has a record of 4 wins and 7 losses in the promotion.
Some of Marcin Prachnio's best fights have been against Ike Villanueva, Khalil Rountree Jr., William Knight and Devin Clark.
Prachnio has 9 losses on his MMA record.
| # | Date | Opponent | Promotion | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|---|
26  | Jul 19, 2025 37 years 17-9 (12) | 29 years, 4 months 12-4-2 (9) | UFC | MD | 1 | SUB | LOSS Armbar |
25  | Jul 27, 2024 36 years 17-8 (12) | 30 years, 5 months 15-6 (10) | UFC | MD | 3 | SUB | LOSS Arm-triangle choke |
24  | Feb 10, 2024 35 years, 6 months 17-7 (12) | 33 years, 9 months 14-8 (5) | UFC | MD | 3 | UD | WIN |
23  | Jul 8, 2023 34 years, 11 months 16-7 (12) | 25 years, 10 months 8-0 (6) | UFC | MD | 3 | SUB | LOSS Arm-triangle choke |
22  | Feb 18, 2023 34 years, 7 months 16-6 (12) | 34 years, 10 months 11-4 (9) | UFC | MD | 3 | UD | WIN |
21  | Apr 23, 2022 33 years, 9 months 15-6 (12) | 36 years, 8 months 14-5 (12) | UFC | MD | 3 | UD | LOSS |
20  | Jun 26, 2021 32 years, 11 months 15-5 (12) | 37 years, 2 months 18-11 (15) | UFC | MD | 2 | KO | WIN Body kick |
19  | Jan 24, 2021 32 years, 6 months 14-5 (11) | 30 years, 10 months 8-4 (5) | UFC | MD | 3 | UD | WIN |
18  | Aug 22, 2020 32 years, 1 months 13-5 (11) | 31 years, 8 months 10-4 (10) | UFC | MD | 1 | KO | LOSS Elbow and punches |
17  | Sep 15, 2018 30 years, 2 months 13-4 (11) | 26 years, 3 months 8-1 (4) | UFC | MD | 1 | TKO | LOSS Head kick and punches |
16  | Feb 24, 2018 29 years, 7 months 13-3 (11) | 31 years, 9 months 31-10 (21) | UFC | MD | 1 | KO | LOSS Punch |
15 | Aug 5, 2017 29 years 13-2 (11) | Gilberto GalvĆ£o | ONE | MD | 1 | KO | WIN Punch |
14 | Aug 27, 2016 28 years, 1 months 12-2 (10) | Jake Butler | ONE | LHW | 1 | TKO | WIN Knees |
13 | May 27, 2016 27 years, 10 months 11-2 (9) | Leandro Ataides | ONE | MD | 3 | SD | WIN |
12 | Feb 20, 2016 27 years, 7 months 10-2 (9) | Alexandre Machado | ONE | HW | 1 | TKO | WIN Punches |
11 | Nov 27, 2015 27 years, 4 months 9-2 (8) | Tomislav SpahoviÄ | LHW | 1 | TKO | WIN Punches | |
10 | Sep 18, 2015 27 years, 2 months 8-2 (7) | Matej BatiniÄ | 3 | UD | WIN | ||
9 | Jun 27, 2015 26 years, 11 months 7-2 (7) | Ryan Salamagnou | 1 | TKO | WIN Punches | ||
8 | Jun 13, 2015 26 years, 10 months 6-2 (6) | Elvir Cosic | 1 | TKO | WIN Punches | ||
7  | Dec 6, 2014 26 years, 4 months 5-2 (5) | 22 years, 10 months 5-1 (5) | 3 | TKO | LOSS Punches | ||
6 | Oct 3, 2014 26 years, 2 months 5-1 (5) | Stepjan Bekavac | 1 | TKO | WIN Knees | ||
5 | Jun 22, 2014 25 years, 11 months 4-1 (4) | Milco Voorn | 1 | TKO | WIN Punches | ||
4 | Jun 6, 2014 25 years, 10 months 3-1 (3) | Bozo Mikulic | 1 | TKO | WIN Punches | ||
3 | Apr 4, 2014 25 years, 8 months 2-1 (2) | Ivica Tadijanov | 3 | UD | LOSS | ||
2 | Nov 9, 2013 25 years, 3 months 2-0 (2) | Milan VinÄiÄ | 1 | SUB | WIN Rear-naked choke | ||
1 | Jul 13, 2013 24 years, 11 months 1-0 (1) | Tomas Siaucila | 1 | KO | WIN Punch |
