Sergiusz Zajac

10-2-0KSW #3Light Heavyweight

PolandLast 5

Amateur MMA 10-9

Last fight: Win vs Salim El Ouassaidi · TKO · Oct 10, 2026

10-2-0 · 11 finishes · Full stats →

LAST FIGHT

WINvs Salim El OuassaidiTKO · R1 01:08

KSWKSW 122: Yakymenko vs Morelli·October 10, 2026

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Sergiusz Zajac holds a professional MMA record of 10-2-0. Zajac has 15 professional MMA bouts on record. Zajac has won 12 fights: 11 by KO/TKO, 0 by submission, 1 by decision. Of 3 career losses, 2 came by KO/TKO and 1 by submission. Most recent fight: October 10, 2026. Tracked organizations: KSW.

Profile

Height: 6'4"193 cm
Weight: 206 lbs93 kg
Reach: 74"188 cm
DOB: Oct 9, 1998
Age: 28
Nationality: Poland
Birthplace: Mielec, Poland

Career stats

Pro MMARecord: 10-2-0 · Source: UFCalendar

Striking

Strikes landed8.42per min

Strikes absorbed5.68per min

Grappling

Takedowns landed0.00per 15 min

Takedowns stuffed75%

Submission attempts0.0per 15 min

See every fight's numbers

Where they rank

All-time boards where Sergiusz Zajac sits in the top 25.

KSW

Recent & upcoming opponents

Career history

WIN
vs Salim El Ouassaidi
KSW 122: Yakymenko vs Morelli· Oct 10, 2026· 215 lb Catchweight· 10-2 vs 12-5
TKO
R1 · 01:08
LOSS
vs Damian Piwowarczyk
KSW 116: Bartosiński vs Fleminas· Mar 14, 2026· Light Heavyweight· 9-2 vs 11-4
TKO
R2 · 1:22
WIN
vs Mariusz Ksiazkiewicz
KSW 110: Grzebyk vs Tulshaev· Sep 20, 2025· Light Heavyweight· 9-1 vs 11-3
TKO
R1 · 1:07
WIN
vs Michal Dreczkowski
KSW 104: Kuberski vs Romanowski· Mar 8, 2025· Light Heavyweight· 8-1 vs 5-1
TKO
R1 · 4:00
WIN
vs Kleber Silva
KSW 97 - Bajor vs Scheffel· Aug 24, 2024· 210 lb Catchweight· 7-1 vs 22-13
TKO
R1 · 1:36
WIN
vs Ramon Drum
Babilon MMA 45· Jun 1, 2024· Catchweight· 6-1 vs 1-2
TKO
R1 · 2:20
WIN
vs Bartlomiej Gladkowicz
Babilon MMA 42· Jan 27, 2024· Light Heavyweight· 5-1 vs 10-5
UD
WIN
vs Dominik Owsiany
Babilon MMA 38· Sep 22, 2023· Light Heavyweight· 4-1 vs 2-4
TKO
R1 · 4:31
WIN
vs Wincenty Krawczyk
Carpathian Warriors 10· Oct 1, 2022· Light Heavyweight· 3-1 vs 0-1
TKO
R1 · 2:50
WIN
vs Łukasz Kulpa
Babilon MMA 30· Jul 8, 2022· Light Heavyweight· 2-1 vs 3-3
TKO
R1 · 2:45
WIN
vs Paweł Całkowski
Prime Show MMA 1· Feb 19, 2022· Light Heavyweight· 1-1 vs 0-1
TKO
LOSS
vs Adam Biegański
The War 1· Jun 11, 2021· 2-2
TKO
WIN
vs Dawid Rachwał
The War 1· Jun 11, 2021· 2-1
TKO
WIN
vs Michał Więcławski
The War 1· Jun 11, 2021· 1-1
TKO
LOSS
vs Łukasz Olech
Opolscy Wojownicy 5· Nov 27, 2020· Catchweight· 0-1 vs 1-0
SUB

Official KSW Ranking

Sergiusz Zajac's standing in the official KSW rankings.

Current: #3 Light Heavyweight
Peak: #3 Light Heavyweight
First ranked: Aug 1, 2026
Times ranked: 3

Light Heavyweight

View full KSW rankings →

UFCalendar Power Index rating

Current: 1754▲26
Peak: 1761Sep 20, 2025
Rated fights: 15

See the full Power Index →

Frequently asked questions

When does Sergiusz Zajac fight next?

Sergiusz Zajac has no confirmed upcoming fight.

What is Sergiusz Zajac's record?

Sergiusz Zajac's professional MMA record is 10-2-0.

Who is Sergiusz Zajac fighting next?

Sergiusz Zajac's next opponent has not been announced.

Who did Sergiusz Zajac fight last?

Sergiusz Zajac most recently fought Salim El Ouassaidi at KSW 122: Yakymenko vs Morelli on Saturday, October 10, 2026, WIN (TKO).

What weight class does Sergiusz Zajac fight in?

Sergiusz Zajac fights at Light Heavyweight.

How many knockouts does Sergiusz Zajac have?

Sergiusz Zajac has 11 wins by KO/TKO and 0 wins by submission.

How tall is Sergiusz Zajac?

Sergiusz Zajac is 6'4" (193 cm) tall.

How much does Sergiusz Zajac weigh?

Sergiusz Zajac weighs 206 lbs (93 kg).

What is Sergiusz Zajac's reach?

Sergiusz Zajac has a reach of 74" (188 cm).

How old is Sergiusz Zajac?

Sergiusz Zajac is 28 years old (born Oct 9, 1998).

Where is Sergiusz Zajac from?

Sergiusz Zajac is from Poland.

Get Sergiusz Zajac's fight history and stats as JSON with the MMA Fight Data API →

CAREER SUMMARY