4. Mike Tyson
Few athletes in the last 50 years have captured the public’s imagination like “Iron” Mike Tyson. Tyson won his first 19 professional fights by knockout and became the youngest heavyweight champion of all time when he won the title by defeating Trevor Berbick in 1986 at just a shade past his 20th birthday.
Tyson’s legacy came undone after he lost the heavyweight title to 42-to-1 underdog Buster Douglas in 1990. Tyson was convicted of rape in 1992 and spent three years of a six-year sentence in prison before he returned to win the heavyweight title in 1996.