Sergiusz Zajac
UFC Debut
Record
Streak
L1
Age
Date of birth
- Fighting out of
- Mielec
- Born
- Poland
- Weight class
- Light Heavyweight
- Height
- 6'4" · 193 cm
Before the UFC
Sergiusz Zajac 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.
Pre-UFC opposition
StrongOpponents' combined record
65-41
.613 win rate
Winning-record opponents
5 of 6
carried winning pro records
Pro bouts faced
11
6 opponents with 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.
Outside the UFC
across 11 bouts · 11 promotions · wins by 8 KO · 1 decKSW 116 · KSW 110 · KSW 104 · KSW 97 · Babilon MMA 45 +6
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| L | KO/TKO | Punches | R2 | 1:22 | KSW 116 | Mar 14, 2026 | |
| W | KO/TKO | Punches | R1 | 1:07 | KSW 110 | Sep 20, 2025 | |
| W | Michal Dreczkowski | KO/TKO | Knee | R1 | 4:00 | KSW 104 | Mar 8, 2025 |
| W | Kleber Silva22-17 | KO/TKO | Submission to Elbows | R1 | 1:36 | KSW 97 | Aug 24, 2024 |
| W | Ramon Drum | KO/TKO | Elbows | R1 | 2:20 | Babilon MMA 45 | Jun 1, 2024 |
| W | Decision | Unanimous | R3 | 5:00 | Babilon MMA 42 | Jan 27, 2024 | |
| W | Dominik Owsiany2-8 | KO/TKO | Elbows | R1 | 4:31 | Babilon MMA 38 | Sep 22, 2023 |
| W | Wincenty Krawczyk | KO/TKO | Knees and Punches | R1 | 2:50 | Carpathian Warriors 10 | Oct 1, 2022 |
| W | Lukasz Kulpa7-4 | KO/TKO | Punches | R1 | 2:45 | Babilon MMA 30 | Jul 8, 2022 |
| W | Pawel Calkowski | KO/TKO | Punches | R3 | 0:00 | Prime Show MMA 1 | Feb 19, 2022 |
| L | Lukasz Olech | Submission | — | R1 | 0:00 | Opolscy Wojownicy 5 | Nov 27, 2020 |
Non-UFC bouts (regional/other promotions) — shown for context only, excluded from Schedule Score, striking/grappling rates, and every UFC-scoped metric.
Amateur
3-2across 5 amateur bouts · 5 promotionsCarpathian Warriors 8 · Gala Sportow Walki · Carpathian Warriors 6 · VFCL 9 · MCF 4
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| L | Kamil Mekal5-5 | Decision | Unanimous | R3 | 3:00 | Carpathian Warriors 8 | Feb 15, 2020 |
| W | Mikolaj Zbierski1-1 | Decision | Unanimous | R3 | 3:00 | Gala Sportow Walki | Oct 19, 2019 |
| W | Szymon Powarzynski0-1 | Submission | Triangle Choke | R3 | 1:30 | Carpathian Warriors 6 | Jun 8, 2019 |
| W | Kamil Nowak | KO/TKO | Punches | R1 | 1:56 | VFCL 9 | Mar 30, 2019 |
| L | Piotr Mochocki0-2 | Decision | Unanimous | R3 | 3:00 | MCF 4 | Nov 2, 2018 |
Amateur (pre-professional) bouts — shown for context only and excluded from the professional record and every UFC-scoped metric.