Adrian Bartosiński Record, stats and next fight

Analysis

Adrian Bartosiński has held the KSW welterweight title since 2023 and has defended it five times, with a single loss in nineteen professional fights. Trained at Oktopus Łódź and American Top Team, the Pole has not lost since moving up to middleweight in 2024.

Background

Born August 26, 1995 in Rawa Mazowiecka, Adrian Bartosiński made his professional debut in March 2018 with Thunderstrike Fight League, taking a points win over Wojciech Żuchnik at middleweight. He followed with several stoppage wins in the regional Wirtuoz Challenge and Rocky Warriors Cartel promotions, then won the 2020 KSW Tylko Jeden tournament, taking his quarterfinal against Kamil Dołgowski and his semifinal against Piotr Walawski. He was forced to withdraw from the final due to injury, which did not stop him from signing with KSW.

KSW Career

Bartosiński made his official KSW debut in March 2021, at welterweight, with a TKO win over Lionel Padilla. He followed with wins over Michał Michalski and then Andrzej Grzebyk, the latter submitted by kneebar and earning him the Submission of the Night bonus, before beating Krystian Kaszubowski by TKO in November 2022. In April 2023, he won the vacant welterweight title by beating Artur Szczepaniak by KO, a performance that earned the KO of the Night bonus. He defended his belt against Salahdine Parnasse in December 2023, then against Igor Michaliszyn in May 2024, again by kneebar. His only professional setback came in November 2024, when he moved up to middleweight to face Mamed Khalidov and lost by armbar submission. Back at welterweight, he continued his title defenses against Andrzej Grzebyk in April 2025, then against Muslim Tulshaev in December 2025, and finally against Madars Fleminas by split decision in March 2026, his most recent fight.

Fighting Style

Adrian Bartosiński combines heavy hands, responsible for twelve of his eighteen wins by KO or TKO, with a ground submission game showcased by two kneebar victories. Trained at American Top Team alongside his home gym, Oktopus Łódź, he has built a complete style capable of finishing a fight standing or on the ground. His only professional loss, suffered against Mamed Khalidov in a weight class above his own, remains the exception in a career otherwise marked by consistency. His ability to finish the large majority of his fights, fourteen finishes out of eighteen wins, sets him apart from champions who rely more heavily on judges’ decisions to keep their title.

Record

• Professional record of 18 wins and 1 loss
• 12 wins by KO or TKO
• 2 wins by submission
• 4 wins by decision
• KSW welterweight champion since April 2023, five title defenses
• KO of the Night bonus against Artur Szczepaniak at KSW 81 and against Krystian Bielski in 2019
• Submission of the Night bonus against Andrzej Grzebyk at KSW 67
• Fight of the Night bonus twice, against Andrzej Grzebyk and against Muslim Tulshaev

Fighter Profile

• Full name: Adrian Bartosiński
• Nickname: Bartos
• Born: August 26, 1995 in Rawa Mazowiecka, Poland
• Nationality: Polish
• Height: 5’11” (180 cm)
• Reach: 5’11” (180 cm)
• Division: welterweight
• Team: Oktopus Łódź, American Top Team
• Coach: Dawid Pepłowski
• Base: striking and ground submissions

Sources

• en.wikipedia.org