Fighter

Sebastian Decowski

"Joker"

6-1-0

PolandLast 5

Amateur MMA 19-2Kickboxing 1-0

NEXT FIGHT

vs Andrzej Karkula

KSWKSW 122 - Bartosinski vs. Masaev·Saturday, October 10, 2026

Sebastian Decowski holds a professional MMA record of 6-1-0. Their full professional MMA career spans 7 bouts on record. Sebastian Decowski has won 6 fights: 4 by KO/TKO, 2 by submission, 0 by decision. Sebastian Decowski also has 1 recorded Kickboxing bout. Most recent fight: April 18, 2026. Tracked organizations: KSW.

Profile

Height: 5'9"175 cm
Weight: 146 lbs66 kg
Reach: 66"168 cm
Nationality: Poland
Birthplace: Rzeszow, Poland

Upcoming

KSWKSW 122 - Bartosinski vs. MasaevOct 10, 2026
vs Andrzej KarkulaBantamweight

Career history

LOSS
vs Tobiasz Le
KSWKSW 117 - Pawlak vs. Khalidov· Apr 18, 2026· Bantamweight· 6-0 vs 6-2
UD
R3 · 5:00
WIN
vs Przemyslaw Gorny
KSWKSW 110 - Grzebyk vs. Tulshaev· Sep 20, 2025· 137 lb Catchweight· 5-0 vs 6-4
SUB
R1 · 1:44
WIN
vs Krzysztof Braciszewski
SSW Fight Night 3· Apr 5, 2025· Bantamweight· 4-0 vs 1-2
SUB
WIN
vs Zoltan Segedi
Strife 11· Dec 14, 2024· Bantamweight· 3-0 vs 4-10
TKO
R1 · 0:38
WIN
vs Sardor Ochilov
FEN 55: Abdurzakov vs. Pietrzak· Jun 15, 2024· Featherweight· 2-0 vs 3-1
TKO
R1 · 1:38
WIN
vs Hama Dara
FSC 5: Hardcorowe Kaszëbë· Oct 8, 2022· Catchweight· 1-0 vs 0-0
TKO
WIN
vs Wiktor Adamski
SSW Fight Night 1· May 7, 2022· Catchweight· 0-0 vs 0-0
TKO

WIN
vs Dominik Dymiński
Armia Fight Night Special Edition· May 8, 2021· Catchweight· 18-2 vs 8-2
UD
LOSS
vs Shamad Erzanukaev
Armia Fight Night 9· Jan 22, 2021· Bantamweight· 18-1 vs 5-0
SD
WIN
vs Konrad Król
Wieczór Walk 7· Oct 2, 2020· Bantamweight· 17-1 vs 0-0
SUB
R1 · 2:56
WIN
vs Jakub Drozdowski
Krwawy Sport 1· Jun 20, 2020· Bantamweight· 16-1 vs 22-3
SD
WIN
vs Abdallah Bellaoui
Carpathian Warriors 8· Feb 15, 2020· Bantamweight· 15-1 vs 0-1
TKO
R1 · 1:51
WIN
vs Maksymilian Podgórski
Blood Fight Night 2· Oct 26, 2019· Bantamweight· 14-1 vs 0-2
UD
LOSS
vs Shamad Erzanukaev
Armia Fight Night 5· Apr 5, 2019· Bantamweight· 14-0 vs 3-0
UD
WIN
vs Grzegorz Joniak
Blood Fight Night 1· Oct 27, 2018· Bantamweight· 13-0 vs 0-0
SUB
R2 · 2:30
WIN
vs Robert Koszowski
Carpathian Warriors 4· May 26, 2018· Bantamweight· 12-0 vs 6-1
SUB
R1 · 1:50
WIN
vs Giuseppe Ferro
Amatorska Liga MMA· Apr 11, 2018· Featherweight· 11-0 vs 5-4
SUB
R1 · 1:36
WIN
vs Kacper Kuchmacz
ALMMA 140· Nov 19, 2017· Bantamweight· 10-0 vs 3-0
SUB
R1 · 1:28
WIN
vs Robert Gromada
ALMMA 140· Nov 19, 2017· Bantamweight· 9-0 vs 2-0
DEC
WIN
vs Krystian Kuś
ALMMA 140· Nov 19, 2017· Bantamweight· 8-0 vs 0-0
SUB
R1 · 0:47
WIN
vs Jakub Tomczak
ALMMA 140· Nov 19, 2017· Bantamweight· 7-0 vs 0-0
SUB
R1 · 0:42
WIN
vs Dawid Niedźwiedzki
Extreme Fight Cage 6· Nov 4, 2017· Catchweight· 6-0 vs 1-0
TKO
R3 · 2:53
WIN
vs Maciej Berkieta
ALMMA 132: Puchar Polski MMA 2017· May 14, 2017· Featherweight· 3-0 vs 0-1
SUB
R1 · 0:26
WIN
vs Giorgi Esiava
ALMMA 132: Puchar Polski MMA 2017· May 14, 2017· Featherweight· 3-0 vs 0-0
DEC
WIN
vs Szymon Lemańczyk-Dalmer
ALMMA 132: Puchar Polski MMA 2017· May 14, 2017· Featherweight· 3-0 vs 0-0
SUB
R1 · 3:25
WIN
vs Giuseppe Ferro
ALMMA 120: Mistrzostwa Podkarpacia· Nov 5, 2016· Featherweight· 2-0 vs 3-3
SUB
R1 · 1:46
WIN
vs Giuseppe Ferro×1Title bout · Title win #1
ALMMA 106: Puchar Podkarpacia· Apr 10, 2016· Featherweight· 1-0 vs 1-0
SUB
R1 · 1:36
WIN
vs Dominik Oślizło
ALMMA 106: Puchar Podkarpacia· Apr 10, 2016· Featherweight· 0-0 vs 0-1
SUB
R1 · 0:38

Career history data via Tapology.

UFCalendar Power Index rating

Current: 1661▼26
Peak: 1687Sep 20, 2025
Rated fights: 7

See the full Power Index →

Frequently asked questions

When does Sebastian Decowski fight next?

Sebastian Decowski fights Andrzej Karkula on Saturday, October 10, 2026 at KSW 122 - Bartosinski vs. Masaev.

What is Sebastian Decowski's record?

Sebastian Decowski's professional MMA record is 6-1-0.

Who is Sebastian Decowski fighting next?

Sebastian Decowski's next opponent is Andrzej Karkula at KSW 122 - Bartosinski vs. Masaev.

Who did Sebastian Decowski fight last?

Sebastian Decowski most recently fought Tobiasz Le at KSW 117 - Pawlak vs. Khalidov on Saturday, April 18, 2026, LOSS (Unanimous Decision).

What weight class does Sebastian Decowski fight in?

Sebastian Decowski fights at Bantamweight.

How many knockouts does Sebastian Decowski have?

Sebastian Decowski has 4 wins by KO/TKO and 2 wins by submission.

How tall is Sebastian Decowski?

Sebastian Decowski is 5'9" (175 cm) tall.

How much does Sebastian Decowski weigh?

Sebastian Decowski weighs 146 lbs (66 kg).

What is Sebastian Decowski's reach?

Sebastian Decowski has a reach of 66" (168 cm).

Where is Sebastian Decowski from?

Sebastian Decowski is from Poland.

CAREER SUMMARY