Mike Tyson

 American ex-professional boxer Michael Gerard Tyson was born June 30 in 1966. Tyson was a fighter in the ring from 1985 to 2005. Tyson, who was nicknamed "Iron Mike" or "Kid Dynamite" during his first professional career as well as later "The Baddest Man on the Planet" is widely considered one of the greatest heavyweight fighters of all time. He was the undisputed champion of the world from 1987 to 1990. Tyson had his first professional fights by knockout. Twelve of those were in the first round. Tyson aged 20 years old, 4 months and 22 days old at the time winning his first heavyweight title holds the record for the youngest boxer to hold the title. Tyson was the first heavyweight boxer to simultaneously hold the WBA, WBC and IBF titles, as well as the only heavyweight to unify these titles consecutively. In the year following, Tyson became the lineal champion when he knocked out Michael Spinks in 91 seconds of the first round. In one of the greatest upsets in history, Tyson was defeated by Buster Douglas in 1990.