Mariusz Książkiewicz
UFC DebutNickname“The Iron Pol”
Record
Streak
L1
Age
Date of birth
- Fighting out of
- Winnipeg, Manitoba
- Born
- Germany
- Weight class
- Middleweight
- Height
- 6'3" · 191 cm
Before the UFC
Mariusz Książkiewicz makes their UFC debut
Our striking, grappling, and schedule metrics are measured from UFC fights, so they come online after this bout. Here is the career they bring in — and how live the opposition has been.
UFC debut
Aug 20, 2026
Pre-UFC opposition
StrongOpponents' combined record
123-75-2
.621 win rate
Winning-record opponents
9 of 13
carried winning pro records
Pro bouts faced
13
all opponents have records on file
A descriptive read of the non-UFC slate from opponents’ full career pro records — not a UFC-grade Schedule Score.
UFC fight history
No UFC bouts on record yet.
Dana White's Contender Series
across 1 bout
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| L | Mário Sousa21-4-1 | Decision | 30–27, 29–28, 29–28 | R3 | 5:00 | Dana White's Contender Series |
Dana White’s Contender Series — a UFC-adjacent proving ground, shown as its own tier. Excluded from Schedule Score and UFC-scoped metrics.
Outside the UFC
across 13 bouts · 13 promotions · wins by 5 KO · 5 sub · 1 decKSW 110 · Ignite Fights · Unified MMA 45 · LFA · Unified MMA 42 +8
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| L | KO/TKO | Punches | R1 | 1:07 | KSW 110 | Sep 20, 2025 | |
| W | Rafael Carvalho17-9 | KO/TKO | Punches | R4 | 0:47 | Ignite Fights | Apr 13, 2024 |
| L | Eli Aronov6-2 | Submission | Arm-Triangle Choke | R2 | 4:32 | Unified MMA 45 | May 27, 2022 |
| W | KO/TKO | Knee to the Body and Punches | R1 | 1:29 | LFA | Apr 22, 2022 | |
| W | Graham Park8-4 | KO/TKO | Punches | R1 | 1:25 | Unified MMA 42 | Dec 17, 2021 |
| W | Submission | Rear-Naked Choke | R1 | 4:07 | Teofista | Nov 9, 2019 | |
| W | Submission | Rear-Naked Choke | R3 | 1:13 | TKO MMA | Aug 2, 2018 | |
| W | KO/TKO | Elbows | R1 | 1:20 | AFC 126 | Oct 19, 2016 | |
| W | KO/TKO | Retirement | R2 | 5:00 | Prestige FC 2 | Mar 12, 2016 | |
| W | Steve Dubeck5-7 | Submission | Rear-Naked Choke | R2 | 3:53 | KOTC | Nov 15, 2013 |
| W | Ash Mashreghi10-10 | Submission | Rear-Naked Choke | R1 | 1:55 | AFC 16 | Mar 23, 2013 |
| W | Dejan Kajic19-9-2 | Decision | Unanimous | R3 | 5:00 | AFC 11 | Sep 15, 2012 |
| W | Submission | Rear-Naked Choke | R1 | 0:27 | CFM 2 | May 13, 2011 |
Non-UFC bouts (regional/other promotions) — shown for context only, excluded from Schedule Score, striking/grappling rates, and every UFC-scoped metric.
Amateur
2-1across 3 amateur bouts · 3 promotionsAFXC 1 · RG · UMAC
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| L | KO/TKO | Punches | R1 | 0:00 | AFXC 1 | Mar 14, 2010 | |
| W | Heath Rud6-2 | Submission | Kimura | R2 | 1:30 | RG | Jan 30, 2010 |
| W | Jason Ungar0-1 | Submission | Armbar | R1 | 1:21 | UMAC | Mar 27, 2009 |
Amateur (pre-professional) bouts — shown for context only and excluded from the professional record and every UFC-scoped metric.