Adam Wieczorek has three losses against three opponents on his MMA record. For a list of Wieczorek's best fights, refer to "Best fights of Adam Wieczorek".
On August 18, 2023 Adam Wieczorek faced off against Marcin Wójcik in a light-heavyweight bout at age 31. He was coming in with a record of 11-3 (10). Wieczorek lost the fight via 2nd-round KO.
On November 3, 2018 Adam Wieczorek faced off against Marcos Rogério de Lima in a heavyweight bout at age 26. He was coming in with a record of 10-2 (9), and Lima was 33 years old and with a record of 15-5-1 (14). Wieczorek lost the fight via 3-round unanimous decision.
On November 5, 2011 Adam Wieczorek faced off against Marcin Tybura at age 19. He was coming in with a record of 1-1 (1), and Tybura was 25 years old and with a record of 1-0 (1). Wieczorek lost the fight via 2-round unanimous decision.
