most knockouts in boxing
Ranking Mike Tyson's 10 greatest (and nastiest) knockouts Ranking Mike Tyson's 10 greatest (and nastiest) knockouts. Happy birthday, Mike Tyson (0:47)A look back at when Mike Tyson knocked out Michael Spinks in 91 seconds on June 27, 1988. Mike Tyson, the former undisputed heavyweight world champion, became a legend because of his awesome punching power. Top 10 Most Expensive Knockout Upsets in Boxing Muhammad Ali KO8 George Foreman (October 30, 1974) / Fight Purse Disparity: $0. Yes, they may have both been huge names in boxing, and they may have received the same amount of money for the fight, but Muhammad Ali knocking out George Foreman in 1974 was definitely a huge upset because of its context.