Artur Sowiński (born March 26, 1987) is a Polish professional mixed martial artist and kickboxer. He currently competes in the Lightweight division. He is a former KSW Featherweight champion.
Mixed martial arts career Early career Sowiński made his professional debut on September 7, 2007 against Sonny Nielsen. Sowiński lost the fight via a first round submission.
After accumulating a record of 4–1, Sowiński faced future Bellator and UFC fighter, Marcin Held. Sowiński lost the fight via Majority Decision.
First KSW stint and Celtic Gladiator After racking up a record of 8–3, Sowiński joined KSW. In his first fight, he faced Danny van Bergen in the first round of the Lightweight Tournament. Sowiński lost the fight via a first round TKO.
His next fight came four months later against Paul Reed. Sowiński won the fight via a first round TKO.
He made his debut with Celtic Gladiator two months later against Carl Morley. Sowiński won the fight via a first round TKO.
His next fight with KSW came two months later against Cengiz Dana. Sowiński won the fight via Unanimous Decision.
A month later, he returned to the cage for Celtic Gladiator. He faced off against future UFC double champion, Conor McGregor. Sowiński lost the fight via a second round TKO.
His next fight came five months later against Maciej Jewtuszko under the KSW banner. Sowiński won the fight via a first round TKO, and also earned himself a Knockout of the Night bonus.
Second KSW Stint KSW featherweight champion After 7 fights, he faced Kleber Koike Erbst for the innagural KSW Featherweight championship. Sowiński won the fight via Unanimous Decision, and thus claimed his first career championship, and claimed a Fight of the Night bonus.
His first title defense came four months later against Fabiano Silva. Sowiński successfully retained his title via Unanimous Decision.
His next title defense came nine months later against Marcin Wrzosek. This time, however, Sowiński lost the fight after a doctor stoppage in the second round, and thus losing his championship.
Return to regionals 10 fights and 6 years later, it was announced that Sowiński was no longer a part of KSW. In his first fight outside of the promotion, he faced Anton Kuivanen for the vacant EFM Lightweight Championship. Sowiński won the fight via Majority Decision, and thus claimed his second career championship.
He returned to KSW for one more fight nine months later against Donovan Desmae. Sowiński lost the fight via a second round submission. Despite the loss, Sowiński earned a Fight of the Night bonus.
After officially leaving KSW, his next fight came five months later under the promotion Prime Show MMA. He faced Adam Okniński. Sowiński won the fight via Unanimous Decision.
His next fight came two months later for the promotion CAVEMMA. He faced Kamil Łebkowski. This fight was under the Pride Rules. Sowiński won the fight via Unanimous Decision.
His next fight came six months later for the promotion USWM. He faced Kamil Łebkowski in a rematch. This bout ended as a No Contest after Łebkowski delivered an illegal knee, and Sowiński was unable to continue.
His next fight came ten months later under the promotion The Warriors MMA. He faced Michał Kornacki. Sowiński won the fight via a first round TKO.
Following a year and a half hiatus, he returned on September 26, 2025 against Kacper Cholewa under Strife MMA. Sowiński lost the fight via a second-round TKO.
He returned two months later in a rematch against Patryk Chrobak under MMA Attack. The two faced a year prior in an exhibition boxing bout. This bout was Sowiński's Middleweight debut. The fight ended fifteen seconds in, after an accidental eye poke rendered Chrobak unable to continue, with the result being a no contest.
He returned three months later against Michał Kornacki in a rematch two years after their last bout under the promotion Dragon Fight Night. Sowiński won the fight via a first-round submission.
Kickboxing career Sowiński made his kickboxing debut on January 21, 2018 against Lubo Slovik. Sowiński won the fight via Unanimous Decision.
His next fight came four years later against Piotr Ćwik. Sowiński won the fight via Unanimous Decision.
His next fight came over a year later against Andreo Kolić. This fight was ruled a Draw.
His next fight came eight months later against Adrian Bolechnowicz. Sowiński won the fight via Unanimous Decision.
Bare-knuckle boxing career Sowiński made his bare-knuckle boxing debut on December 20, 2025 against Vaso Bakočević. The two previously met 11 years prior in an MMA bout. Sowiński won the fight via a first-round knockout.
His next fight came on May 23, 2026, against Adam Ugorski. Sowiński won the fight via a Unanimous Decision.
Championships and accomplishments Mixed martial arts Konfrontacja Sztuk Walki KSW Featherweight Championship (One time; former) One successful title defense Fight of the Night (Three times) Submission of the Night (One time) Knockout of the Night (One time)
EFM Show EFM Lightweight Championship (One time; former)
Mixed martial arts record
|Win |align=center| |Michał Kornacki |Submission (rear-naked choke) |Dragon Fight Night 8 | |align=center|1 |align=center|3:00 |Tłuszcz, Poland
|NC |align=center| |Patryk Chrobak |NC (accidental eye poke) |MMA Attack 6 | |align=center|1 |align=center|0:13 |Będzin, Poland
|Loss |align=center| |Kacper Cholewa |TKO (punches) |Strife 15 | |align=center|2 |align=center|2:47 |Grodzisk Mazowiecki, Poland
|Win |align=center| |Michał Kornacki |TKO (retirement) |The Wariors MMA 3 | |align=center|1 |align=center|5:00 |Mysłowice, Poland
|NC |align=center| |Kamil Łebkowski |NC (illegal knee) |USWM MMA Cup 31 | |align=center|2 |align=center|3:06 |Grajewo, Poland
|Win |align=center| |Kamil Łebkowski |Decision (unanimous) |CaveMMA 2 | |align=center|3 |align=center|5:00 |Jastrzębie-Zdrój, Poland
|Win |align=center| |Adam Okniński |Decision (unanimous) |Prime Show MMA 4 | |align=center|3 |align=center|5:00 |Szczecin, Poland
|Loss |align=center| |Donovan Desmae |Submission (rear-naked choke) |KSW 71 | |align=center|2 |align=center|2:42 |Toruń, Poland
|Win |align=center| |Anton Kuivanen |Decision (majority) |EFM Show 2 | |align=center|5 |align=center|5:00 |Sofia, Bulgaria
|Loss |align=center| |Sebastian Rajewski |Decision (split) |KSW 62 | |align=center|3 |align=center|5:00 |Warsaw, Poland
|Loss |align=center| |Borys Mańkowski |Decision (unanimous) |KSW 57 | |align=center|3 |align=center|5:00 |Łódź, Poland
|Win |align=center| |Gracjan Szadziński |TKO (knees and punches) |KSW 53 | |align=center|1 |align=center|2:04 |Warsaw, Poland
|Win |align=center| |Vinicius Bohrer |TKO (head kick and punches) |KSW 52 | |align=center|1 |align=center|0:51 |Gliwice, Poland
|Loss |align=center| |Norman Parke |Decision (unanimous) |KSW 49 | |align=center|3 |align=center|5:00 |Gdańsk, Poland
|Win |align=center| |Kamil Szymuszowski |Decision (unanimous) |KSW 46 | |align=center|3 |align=center|5:00 |Gliwice, Poland
|Loss |align=center| |Salahdine Parnasse |Decision (unanimous) |KSW 43 | |align=center|3 |align=center|5:00 |Wrocław, Poland
|Loss |align=center| |Kleber Koike Erbst |Submission (rear-naked choke) |KSW 41 | |align=center|3 |align=center|3:56 |Katowice, Poland
|Win |align=center| |Łukasz Chlewicki |Submission (triangle choke) |KSW 38 | |align=center|1 |align=center|1:51 |Sękocin Nowy, Poland
|Loss |align=center| |Marcin Wrzosek |TKO (doctor stoppage) |KSW 37 | |align=center|2 |align=center|2:55 |Kraków, Poland
|Win |align=center| |Fabiano Silva |Decision (unanimous) |KSW 34 | |align=center|5 |align=center|5:00 |Warsaw, Poland
|Win |align=center| |Kleber Koike Erbst |Decision (unanimous) |KSW 33 | |align=center|5 |align=center|5:00 |Kraków, Poland
|Win |align=center| |Vaso Bakočević |Decision (split) |KSW 29 | |align=center|3 |align=center|5:00 |Kraków, Poland
|Win |align=center| |Anzor Azhiev |DQ (illegal knee) |KSW 26 | |align=center|1 |align=center|3:07 |Warsaw, Poland
|NC |align=center| |Anzor Azhiev |NC (accidental clash of heads) |KSW 24 | |align=center|1 |align=center|1:54 |Łódź, Poland
|Win |align=center| |Michal Kozmer |TKO (punches) |Celtic Gladiator 6 | |align=center|1 |align=center|4:35 |Dublin, Ireland
|Loss |align=center| |Maciej Jewtuszko |Submission (brabo choke) |KSW 21 | |align=center|2 |align=center|4:01 |Warsaw, Poland
|NC |align=center| |Artem Lobov |NC (overturned) |Celtic Gladiator 5 | |align=center|3 |align=center|5:00 |Dublin, Ireland
|Loss |align=center|12–6 |Curt Warburton |Submission (arm-triangle choke) |KSW 18 | |align=center|2 |align=center|3:03 |Płock, Poland
|Win |align=center|12–5 |Maciej Jewtuszko |KO (punches) |KSW 17 | |align=center|1 |align=center|0:46 |Łódź, Poland
|Loss |align=center|11–5 |Conor McGregor |TKO (punches) |Celtic Gladiator 2 | |align=center|2 |align=center|1:12 |Portlaoise, Ireland
|Win |align=center|11–4 |Cengiz Dana |Decision (unanimous) |KSW 16 | |align=center|2 |align=center|5:00 |Gdańsk, Poland
|Win |align=center|10–4 |Carl Morley |TKO (punches) |Celtic Gladiator 1 | |align=center|1 |align=center|0:16 |Portlaoise, Ireland
|Win |align=center|9–4 |Paul Reed |TKO (punches) |KSW Extra 2 | |align=center|1 |align=center|2:45 |Ełk, Poland
|Loss |align=center|8–4 |Danny van Bergen |Decision (unanimous) |KSW 14 | |align=center|3 |align=center|5:00 |Łódź, Poland
|Loss |align=center|8–3 |Niko Puhakka |Decision (unanimous) |Fight Festival: Goes Kaisaniemi | |align=center|3 |align=center|5:00 |Helsinki, Finland
|Win |align=center|8–2 |Jan David |TKO (punches) |Extreme Fight Arena 1 | |align=center|1 |align=center|0:29 |Zielona Góra, Poland
|Win |align=center|7–2 |Paweł Żydak |Submission (triangle choke) |International FC: Tsunami Tournament 1 | |align=center|1 |align=center|4:22 |Debrzno, Poland
|Win |align=center|6–2 |Piotr Kurowski |Submission (triangle choke) |Bushido 6 | |align=center|2 |align=center|2:47 |Piła, Poland
|Win |align=center|5–2 |Mateusz Piórkowski |Submission (armbar) |Polish Amateur MMA Association: Southern Poland Championships | |align=center|1 |align=center|2:54 |Katowice, Poland
|Loss |align=center|4–2 |Marcin Held |Decision (majority) |MMA Challengers 1 | |align=center|2 |align=center|5:00 |Mysłowice, Poland
|Win |align=center|4–1 |Craig Jose |Submission (rear-naked choke) |10th Legion - The War Machine | |align=center|1 |align=center|1:56 |Kingston upon Hull, England
|Win |align=center|3–1 |Keith Norton |Submission (kimura) |Ring of Truth 8 | |align=center|1 |align=center|1:11 |Trenčín, Slovakia
|Win |align=center|2–1 |Zaurbek Muchaev |KO (head kick) |Pro Fight 3 | |align=center|1 |align=center|2:01 |Olsztyn, Poland
|Win |align=center|1–1 |Daniel Tobolik |Submission (triangle choke) |Bytomska Gala MMA 1 | |align=center|1 |align=center|1:14 |Bytom, Poland
|Loss |align=center|0–1 |Sonny Nielsen |Submission (armbar) |Nord Bohemia Ring 3 | |align=center|1 |align=center|3:57 |Česká Lípa, Czech Republic |
Kickboxing record
|- bgcolor="#cfc" | 2024-07-06 || Win ||align=left| Adrian Bolechowicz || Kuyavian Cage || Inowrocław, Poland || Decision (Unanimous) ||3 ||3:00 |- |- style="background:#c5d2ea;" | 2023-11-11 || Draw||align=left| Andreo Kolić || Lewy Prosty Fight Night 4 || Opole, Poland || Decision (Draw) ||3 ||3:00 |- |- bgcolor="#cfc" | 2022-09-24 || Win ||align=left| Piotr Ćwik || MMA Attack 4 || Będzin, Poland || Decision (Unanimous) ||3 ||3:00 |- |- bgcolor="#cfc" | 2018-01-21 || Win ||align=left| Lubo Slovik || Cage Ring Championship 7: Annihilation || Dublin, Ireland || Decision (Unanimous) ||3 ||3:00
Exhibition boxing record
ResultRecordOpponentTypeRound, timeDateLocationNotes3Loss1–2Aslambek Arsamikov2 (4) 23 Nov 20242Win1–1Patryk ChrobakUD314 Sep 20241Loss0–1Łukasz Szulc31 Mar 2024
Bare-knuckle boxing record
|Win |align=center|2–0 |Adam Ugorski |Decision (unanimous) |Fight Mode 1 | |align=center|5 |align=center|2:00 |Poznań, Poland
|Win |align=center|1–0 |Vaso Bakočević