Mike Tyson collection of all boxing knockouts, best fights and moments since 1985 year Tyson is a former undisputed heavyweight champion of the world and holds the record as the youngest boxer to win the WBC, WBA and IBF heavyweight titles at 20 years, 4 months, and 22 days old. Tyson won his first 19 professional bouts by knockout, 12 of them in the first round. He won the WBC title in 1986 after defeating Trevor Berbick by a TKO in the second round. In 1987, Tyson added the WBA and IBF titles after defeating James Smith and Tony Tucker. He was the first heavyweight boxer to simultaneously hold the WBA, WBC and IBF titles, and the only heavyweight to successively unify them. Timecodes: 00:23 - vs Hector Mercedes 00:58 - vs Trent Singelton 01:37 - vs Don Halpin 02:10 - vs Ricardo Spain 02:39 - vs John Alderson 03:13 - vs Lorenzo Canady 04:02 - vs Donnie Long 04:43 - vs Robert Colay 05:04 - vs Sterling Benjamin 05:30 - vs Eddie Richardson 05:58 - vs Conroy Nelson 06:14 - vs Sammy Scaff 06:37 - vs Mark Young 07:00 - vs David Jaco 07:41 - vs Mike Jameson 08:08 - vs Steve Zouski 08:36 - vs Reggie Gross 09:08 - vs William Hosea 09:38 - vs Lorenzo Boyd 10:08 - vs Marvis Fraizer 10:34 - vs Alfonso Ratliff 11:10 - vs Trevor Berbick 11:55 - vs Pinklon Thomas 12:30 - vs Tyrell Biggs 13:06 - vs Larry Holmes 13:30 - vs Tony Tubbs 13:52 - vs Michael Spinks 14:23 - vs Carl Williams 14:47 - vs Henry Tillman 15:14 - vs Alex Stewart 15:58 - vs Donovan Ruddok 16:20 - vs Peter McNeeley 16:56 - vs Buster Mathis Jr. 17:25 - vs Frank Bruno 17:54 - vs Bruce Seldon 18:36 - vs Francois Botha 19:10 - vs Orlin Norris 19:36 - vs Julius Francis 20:40 - vs Lou Savarese 21:19 - vs Clifford Etienne