Lewis Crocker is a decorated Irish fighter, winner of seven All-Ireland Junior titles and a European Schoolboy bronze medal. In his amateur days, he gained recognition for the fastest recorded knockout — under 12 seconds.
Turning professional in 2017 as a welterweight, Crocker holds an undefeated 22–0 record with 11 knockouts. He captured the WBO European Welterweight Title in 2020 and, in 2025, defeated Paddy Donovan by split decision to become the IBF World Welterweight Champion.