[1] Sulęcki made his professional debut in June 2010, defeating Adam Gawlik by knockout in the first round in Kielce, Poland.
Sulęcki then faced former European champion and WBA middleweight world title challenger Grzegorz Proksa at the Krakow Arena, Poland in November 2014.
[2] Following that victory, the Pole teamed up with promoter Lou DiBella and manager Al Haymon and made his US debut against Darryl Cunningham at the UIC Pavilion, Chicago in April 2015.
In October, he fought Jack Culcay, backing up the World Boxing Super Series quarter-final match between Krzysztof Włodarczyk and Murat Gassiev.
After that, Sulecki fought former world middleweight champion Daniel Jacobs, who was ranked #2 by the WBA and WBO and #3 by the WBC and IBF at the time.