In his 50 wins 6 of them came from his undefeated opponents such as Ricardo Spain, Lorenzo Canady, Tony Tucker, Tyrell Biggs, Michael Spinks and Buster Mathis Jr. Aside from that Michael Spinks and Tyrell Biggs were both olympic gold medalists in 1976 and 1984 respectively.
Watch also his top 10 uppercuts    • Mike Tyson TOP 10 Uppercuts