Mike Tyson is an American former professional boxer who competed from 1985 to 2005. He held the undisputed heavyweight championship and holds the record as the youngest boxer to win the WBA, WBC, and IBF heavyweight titles at 20 years, 4 months, and 22 days old. Tyson won his first 19 professional fights by knockout, 12 of them in the first round. He won the WBC title in 1986 after stopping Trevor Berbick in two rounds. In 1987, Tyson added the WBA and IBF titles after defeating James Smith and Tony Tucker. This made him the first heavyweight boxer to simultaneously hold the WBA, WBC, and IBF titles, and the only heavyweight to successively unify them.
Tyson was well known for his ferocious and intimidating boxing style as well as his controversial behavior inside and outside the ring. Nicknamed "Iron", and "Kid Dynamite" in his early career and later known as "The Baddest Man on the Planet", Tyson is considered one of the best heavyweights of all time. He was ranked No. 16 on The Ring's list of 100 greatest punchers of all time, and No. 1 in the ESPN.com list of "The hardest hitters in heavyweight history". Sky Sports rated him as "the scariest boxer ever" and described him as "perhaps the most ferocious fighter to step into a professional ring." He has been inducted into the International Boxing Hall of Fame and the World Boxing Hall of Fame.