Josef Stummer MMA Profile Record, Stats, Biography, KSW Career & Fight History
Photo Credit:ksw_mma/instagram
JOSEF STUMMER
“Air”
CZECH REPUBLIC • FEATHERWEIGHT
W-L-D
8-2-0
(T)KO
1-1
SUB
2-1
BIOGRAPHY
COUNTRY
Czech Republic
WT CLASS
Featherweight
HT / WT
5′ 8″, 148 lbs
BIRTHDATE
12/28/1996 (29)
STANCE
Orthodox
REACH
70.0″ (178cm)
TEAM / RESIDENCE
MMA Liberec • Liberec, Czech Republic
NICKNAME
“Air”
RESOURCE LINKS
PERSONAL LINKS
CAREER HONOURS & HISTORICAL RECORDS
Josef Stummer Record
WINS8
KO/TKO
1
SUB
2
DECISION
5
LOSSES2
KO/TKO
1
SUB
1
DECISION
0
DRAWS0
DR
0
NO CONTEST0
NC
0
Percentage Statistics
Calculated from 10 professional bouts (8-2-0).
RESULT
FIGHTER
EVENT
METHOD
DURATION/DATE
WIN
Lukasz Charzewski
Poland
Poland
KSW 121 – Vojcak vs. Wojcik
Sep / 19 / 2026
Decision (Split)
Rnd 3 (5:00)
Sep / 19 / 2026
ROUND3
TIME5:00
METHODDecision (Split)
Bout Specifications & Fight Financials
View Dossier
🥊 KSW 121 Featherweight Contender Bout • Stummer vs. Charzewski
Main Card Feature
Fighter MatchupJosef Stummer vs Lukasz Charzewski
Fight Location Liberec, Czech Republic (Home Credit Arena)
Liberec, Czech Republic (Home Credit Arena)Duration3 x 5 min
Weights Matchup145 lbs vs 145 lbs
Lukasz Charzewski Record at Bout (Opponent)14-3-0
Josef Stummer Record at Bout7-2-0
💰 Pre-Fight Betting Odds
Lukasz Charzewski: -175 (Favorite)
vs
Josef Stummer: +140 (Underdog)
Officials & Scorecards
Ref: Paulina Swider
Judge 1: 30-27 Stummer
Judge 2: 29-28 Stummer
Judge 3: 28-29 Charzewski
🥊 Action & Knockdowns:
In front of his home crowd in Liberec, Stummer used slick reactive takedowns and sharp counter-striking to edge out former FEN champion Łukasz Charzewski in a tense split decision.
WIN
Michal Domin
Poland
Poland
KSW 115 – Przybysz vs. Yakymenko
Feb / 21 / 2026
Decision (Unanimous)
Rnd 3 (5:00)
Feb / 21 / 2026
ROUND3
TIME5:00
METHODDecision (Unanimous)
Bout Specifications & Fight Financials
View Dossier
🥊 KSW 115 Catchweight (148 lbs) Bout • Stummer vs. Domin
Main Card Feature
Fighter MatchupJosef Stummer vs Michal Domin
Fight Location Lubin, Poland (Hala CRS)
Lubin, Poland (Hala CRS)Duration3 x 5 min
Weights Matchup148 lbs (Missed Weight) vs 146 lbs
Michal Domin Record at Bout (Opponent)7-4-0
Josef Stummer Record at Bout6-2-0
💰 Pre-Fight Betting Odds
Michal Domin: -150 (Favorite)
vs
Josef Stummer: +125 (Underdog)
Officials & Scorecards
Ref: Aleh Miliakou
Scorecard 1: 29-27
Scorecard 2: 29-27
Scorecard 3: 29-27
🥊 Action & Knockdowns:
Despite starting with a one-point deduction for missing weight, Stummer dominated Domin on the canvas across all three rounds, landing ground-and-pound to take a unanimous decision (29-27 across all judges).
WIN
Eduard Kexel
Germany
Germany
KSW 109 – Kuberski vs. Paczuski
Aug / 09 / 2025
Decision (Unanimous)
Rnd 3 (5:00)
Aug / 09 / 2025
ROUND3
TIME5:00
METHODDecision (Unanimous)
Bout Specifications & Fight Financials
View Dossier
🥊 KSW 109 Featherweight Bout • Stummer vs. Kexel
Main Card Feature
Fighter MatchupJosef Stummer vs Eduard Kexel
Fight Location Warsaw, Poland (ATM Studio)
Warsaw, Poland (ATM Studio)Duration3 x 5 min
Weights Matchup145 lbs vs 145 lbs
Eduard Kexel Record at Bout (Opponent)10-2-0
Josef Stummer Record at Bout5-2-0
💰 Pre-Fight Betting Odds
Eduard Kexel: -165 (Favorite)
vs
Josef Stummer: +135 (Underdog)
Officials & Scorecards
Ref: Tomasz Bronder
Scorecard: 29-28
Scorecard: 29-28
Scorecard: 29-28
🥊 Action & Knockdowns:
Stummer out-grappled German standout Eduard Kexel, executing chain takedowns and controlling the scrambles to earn 29-28 scores on all three judges’ cards.
WIN
Nacim Belhouachi
France
France
KSW 103 – Brichta vs. Charzewski
Feb / 21 / 2025
KO (Punch)
Rnd 1 (2:02)
Feb / 21 / 2025
ROUND1
TIME2:02
METHOD
KO (Punch)
Bout Specifications & Fight Financials
View Dossier
🥊 KSW 103 Featured Bout • Stummer vs. Belhouachi
Featured Bout
Fighter MatchupJosef Stummer vs Nacim Belhouachi
Fight Location Liberec, Czech Republic (Home Credit Arena)
Liberec, Czech Republic (Home Credit Arena)Duration3 x 5 min
Weights Matchup146 lbs vs 146 lbs
Nacim Belhouachi Record at Bout (Opponent)4-3-0
Josef Stummer Record at Bout4-2-0
💰 Pre-Fight Betting Odds
Josef Stummer: -140 (Favorite)
vs
Nacim Belhouachi: +115 (Underdog)
Officials
Ref: Tomasz Bronder
🥊 Action & Knockdowns:
Fighting in his hometown of Liberec, Stummer connected with a devastating overhand right that sent Belhouachi crashing to the canvas at 2:02 of round one, earning a Knockout of the Night bonus.
LOSS
Wojciech Kazieczko
Poland
Poland
KSW 99 – Vojcak vs. Martinek
Oct / 19 / 2024
Submission (Ninja Choke)
Rnd 3 (4:09)
Oct / 19 / 2024
ROUND3
TIME4:09
METHODSubmission (Ninja Choke)
Bout Specifications & Fight Financials
View Dossier
🥊 KSW 99 Main Card • Kazieczko vs. Stummer
Featured Bout
Fighter MatchupJosef Stummer vs Wojciech Kazieczko
Fight Location Gliwice, Poland (PreZero Arena)
Gliwice, Poland (PreZero Arena)Duration3 x 5 min
Weights Matchup146 lbs vs 146 lbs
Wojciech Kazieczko Record at Bout (Opponent)4-2-0
Josef Stummer Record at Bout4-1-0
💰 Pre-Fight Betting Odds
Josef Stummer: -110 (Pick’em)
vs
Wojciech Kazieczko: -110 (Pick’em)
Officials
Ref: Piotr Jarosz
🥊 Action & Knockdowns:
Stummer pressured Kazieczko with aggressive wrestling across three rounds, but Kazieczko locked in a ninja choke during a frantic scramble to secure the tap at 4:09 of round three.
WIN
Adrian Wieliczko
Poland
Poland
KSW 91 – Mircea vs. Brichta
Feb / 17 / 2024
Submission (Triangle Choke)
Rnd 2 (4:20)
Feb / 17 / 2024
ROUND2
TIME4:20
METHOD
Submission (Triangle Choke)
Bout Specifications & Fight Financials
View Dossier
🥊 KSW 91 Feature • Stummer vs. Wieliczko
Featured Bout
Fighter MatchupJosef Stummer vs Adrian Wieliczko
Fight Location Liberec, Czech Republic (Home Credit Arena)
Liberec, Czech Republic (Home Credit Arena)Duration3 x 5 min
Weights Matchup145 lbs vs 145 lbs
Adrian Wieliczko Record at Bout (Opponent)3-2-0
Josef Stummer Record at Bout3-1-0
💰 Pre-Fight Betting Odds
Josef Stummer: -115 (Favorite)
vs
Adrian Wieliczko: -105 (Underdog)
Officials
Ref: Marc Goddard
🥊 Action & Knockdowns:
Stummer threw up a tight triangle choke off his back during a scramble in round two, submitting Wieliczko at 4:20 and taking home a Submission of the Night bonus.
LOSS
Dawid Kareta
Poland
Poland
KSW 87 – Stosic vs. Martinek
Oct / 14 / 2023
TKO (Knees and Punches)
Rnd 1 (4:10)
Oct / 14 / 2023
ROUND1
TIME4:10
METHODTKO
Bout Specifications & Fight Financials
View Dossier
🥊 KSW 87 Feature • Stummer vs. Kareta
Featured Bout
Fighter MatchupJosef Stummer vs Dawid Kareta
Fight Location Třinec, Czech Republic (Werk Arena)
Třinec, Czech Republic (Werk Arena)Duration3 x 5 min
Weights Matchup145 lbs vs 145 lbs
Dawid Kareta Record at Bout (Opponent)4-3-0
Josef Stummer Record at Bout3-0-0
💰 Pre-Fight Betting Odds
Josef Stummer: -165 (Favorite)
vs
Dawid Kareta: +135 (Underdog)
Officials
Ref: Tomasz Bronder
🥊 Action & Knockdowns:
Kareta trapped Stummer along the cage, connecting with a knee to the body followed by a flurry of punches to hand Stummer his first professional defeat at 4:10 of round one.
WIN
Jonatan Kujawa
Poland
Poland
KSW 81 – Bartosinski vs. Szczepaniak
Apr / 22 / 2023
Decision (Unanimous)
Rnd 3 (5:00)
Apr / 22 / 2023
ROUND3
TIME5:00
METHODDecision (Unanimous)
Bout Specifications & Fight Financials
View Dossier
🥊 KSW Promotional Debut • Stummer vs. Kujawa
KSW Debut
Fighter MatchupJosef Stummer vs Jonatan Kujawa
Fight Location Tomaszów Mazowiecki, Poland (Arena Lodowa)
Tomaszów Mazowiecki, Poland (Arena Lodowa)Duration3 x 5 min
Weights Matchup146 lbs vs 146 lbs
Jonatan Kujawa Record at Bout (Opponent)1-0-0
Josef Stummer Record at Bout2-0-0
💰 Pre-Fight Betting Odds
Josef Stummer: -250 (Favorite)
vs
Jonatan Kujawa: +190 (Underdog)
Officials & Scorecards
Ref: Grzegorz Szczepanik
Scorecard 1: 30-27
Scorecard 2: 30-27
Scorecard 3: 30-27
🥊 Action & Knockdowns:
Making his KSW debut, Stummer controlled Kujawa with superior grappling from top position in each round to earn a shutout 30-27 unanimous decision.
WIN
Gergely Csibi
Hungary
Hungary
Real Fight Arena 8 – RFA 8
Feb / 04 / 2023
Submission (Scarf Hold)
Rnd 3 (1:16)
Feb / 04 / 2023
ROUND3
TIME1:16
METHODSubmission
Bout Specifications & Fight Financials
View Dossier
🥊 RFA 8 Feature • Stummer vs. Csibi
Featured Bout
Fighter MatchupJosef Stummer vs Gergely Csibi
Fight Location Budapest, Hungary (BOK Sportcsarnok)
Budapest, Hungary (BOK Sportcsarnok)Duration3 x 5 min
Weights Matchup145 lbs vs 145 lbs
Gergely Csibi Record at Bout (Opponent)0-0-0
Josef Stummer Record at Bout1-0-0
💰 Pre-Fight Betting Odds
Josef Stummer: -450 (Favorite)
vs
Gergely Csibi: +325 (Underdog)
Officials
Ref: Lukasz Bosacki
🥊 Action & Knockdowns:
Stummer dominated the grappling exchanges across three rounds before locking in a kesa-gatame scarf hold armlock to force the submission at 1:16 of the final frame.
WIN
Bartosz Rewera
Poland
Poland
Real Fight Arena 3 – RFA 3: Ostrava
Jul / 23 / 2022
Decision (Unanimous)
Rnd 3 (5:00)
Jul / 23 / 2022
ROUND3
TIME5:00
METHODDecision (Unanimous)
Bout Specifications & Fight Financials
View Dossier
🥊 Professional MMA Debut • Stummer vs. Rewera
Pro Debut
Fighter MatchupJosef Stummer vs Bartosz Rewera
Fight Location Ostrava, Czech Republic (Ostravar Aréna)
Ostrava, Czech Republic (Ostravar Aréna)Duration3 x 5 min
Weights Matchup145 lbs vs 145 lbs
Bartosz Rewera Record at Bout (Opponent)1-1-0
Josef Stummer Record at Bout0-0-0 (Debut)
💰 Pre-Fight Betting Odds
Josef Stummer: -185 (Favorite)
vs
Bartosz Rewera: +145 (Underdog)
Officials
Ref: Vladimir Badrljica
🥊 Action & Knockdowns:
In his professional debut, Stummer used his wrestling base to ground Polish opponent Bartosz Rewera repeatedly across 15 minutes, sweeping the scorecards to take a unanimous decision.
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