On June 15, 2022, the Confrontation of Martial Arts (promoting fighting in MMA ) informed fans via social media about the contracting of Arkadiusz Wrzosek. Three days later, during the KSW 71 gala, the match between
Tomasz Sarara and Arkadiusz Wrzosek was announced as the main event of the
KSW 73 gala, which took place on August 20, 2022 in Warsaw. Wrzosek made a successful debut in the MMA formula, beating Sarara via TKO in the third round. Wrzosek faced
Tomáš Možný at
KSW 79 on February 25, 2023. He won the bout via unanimous decision. Wrzosek faced former two-time world kickboxing champion and MMA debutant
Bogdan Stoica at
XTB KSW 83: Colosseum 2 on June 3, 2023. He won the bout via forearm choke in the first round. Wrzosek faced his toughest test to date, facing FNC Champion Ivan Vitasović on January 20, 2024 at
KSW 90: Wrzosek vs. Vitasović, winning the bout via TKO stoppage in the first round. Wrzosek faced former
WBC heavyweight title challenger
Artur Szpilka on May 11, 2024 at
XTB KSW 94: Bartosiński vs. Michaliszyn. He won the bout by knockout in the first round. ==Championships and accomplishments==