« le Prince de Radom »
14-3-0 (W-L-D)
Loss breakdown not available.
Patryk Kaczmarczyk, known as the Prince of Radom, won the KSW featherweight title in 2025 after two setbacks against the same opponent. The Pole holds a record of 14 wins against 3 losses, including a title defense secured in 2026.
Born June 23, 1998 in Radom, Patryk Kaczmarczyk started in Brazilian jiu-jitsu, a discipline in which he earned his purple belt, before turning to professional MMA in June 2019 under the Armia Fight Night banner. He put together six straight wins, four of them by submission or TKO, at events held in Radom, Gliwice and Mińsk Mazowiecki, and won the vacant Armia Fight Night featherweight title in 2020. His time with KSW began in April 2021 with a points win over Michał Sobiech, before a first setback: a points loss to Robert Ruchała in October 2021. He bounced back in 2022 with wins over Michał Domin and Pascal Hintzen, the latter finished by knee strikes inside the first minute.
Kaczmarczyk continued his progress with KSW, a promotion where fellow Pole Jan Błachowicz also competed over in the UFC, with decision wins over Daniel Tărchilă and Daniel Rutkowski, the latter earning the Fight of the Night bonus. In May 2024, he faced Robert Ruchała a second time for the interim featherweight title and lost by KO to a body kick inside the first minute of KSW 94. He got back on track in January 2025 against Ahmed Vila, then won the interim title in November 2025 by submitting Adam Soldaev in the fifth round of KSW 112, a fight that earned him a double Fight of the Night and Submission of the Night bonus. He became undisputed champion of the division and defended his belt in June 2026 against Leo Brichta, submitted by arm-triangle choke in the third round of KSW 119, his most recent fight.
Patryk Kaczmarczyk relies on a Brazilian jiu-jitsu base, reflected in four submission wins, including two rear-naked chokes and two arm-triangle chokes, the latter secured during his title defense against Leo Brichta. That ground game is paired with striking timing that has earned him three wins by KO or TKO, most often from knees landed early in a fight. His two KO losses, both conceded to Robert Ruchała, point to a vulnerability to body and leg strikes that he had to correct on his way to the title.
Data updated on November 3, 2026. Record and measurements cross-checked against official results and Wikipedia. Text written by the MMA Official editorial team.
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