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50 wins, 6 losses.
Tyson's professional record was 50 wins, 6 losses, 0 draws, 2 no contests. 44 of the 50 wins came by knockout.
Total:58 fights Wins: 50 by KO 44 Losses: 6 No contests: 2
37 straight wins before his fight with buster that ended with a lost.
Tyson had 44 KO victories out of his 56 professional bouts. A KO percentage of 75.86%.
Chimpanze
Wins: 50(44 ko's)- Losses: 6(5 ko's and one dq.) plus two no contests.
58 fights. 50 wins, 6 losses and 2 no contests. boxrec.com will have his complete record.
50 Wins (44 knockouts, 5 decisions, 1 disqualification), 6 Losses , 0 Draws, 2 No Contests.
{| ! Total fights | 58 ! Wins | 50 ! Wins by KO | 44 ! Losses | 6 ! Draws | 0 ! No contests | 2 http://www.boxrec.com/list_bouts.php?human_id=000474&cat=boxer |}
50 Wins (44 knockouts, 5 decisions, 1 disqualification), 6 Losses , 0 Draws, 2 No Contests full record available from tysons wiki page, and from boxrec.com
The first person to beat Mike Tyson when he was the heavyweight champion was Buster Douglas. Here's the full list of Tyson's fights, with wins, loses and draws: http://en.wikipedia.org/wiki/Mike_Tyson#Professional_boxing_record