Michael Gerard Tyson - He reigned as the undisputed world heavyweight champion and holds the record as the youngest boxer to win a heavyweight title 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, and added the WBA and IBF titles after defeating James Smith and Tony Tucker in 1987. This made Tyson the first heavyweight boxer to simultaneously hold the WBA, WBC and IBF titles, and the only heavyweight to successively unify them. In 2002, Tyson fought for the world heavyweight title again at the age of 35, losing by knockout to Lennox Lewis. Tyson retired from professional boxing in 2006, after being knocked out in consecutive matches against Danny Williams and Kevin McBride. Thank you for watching! Subscribe now! Click here: https://goo.gl/v7huqp, comment, share if you like this video. We are in social networks: ►Instagram: https://www.instagram.com/this_is_interesting05/ ►Twitter: https://twitter.com/sportnews05 ►Google+: https://plus.google.com/u/0/b/116137208475021983570/116137208475021983570 Video Link: https://youtu.be/2fYhn7yKuIo