10 Gold-Medal Knockout Kings
"Merciless" Ray Mercer, Heavyweight, 36-7-1
Gold Medal - 1988 Olympics, Seoul, Korea
Mercer made some poor fight decisions in his career and never really caught the public's imagination as a champion. He won a lot of fights, but he might be most famous for losing to nearly every heavyweight champion of his era, including Lennox Lewis, Evander Holyfield and Wladimir Klitschko.