Muhammad Ali

vs. Alfredo Evangelista
vs. Buster Mathis
vs. Trevor Berbick
vs. Jimmy Young
vs. Chuck Wepner
vs. Mac Foster
vs. Joe Bugner 'I and II'
vs. Leon Spinks 'II'
vs. George Chuvalo 'I and II"
vs. Ernie Terrell

The guy would have probably 'died' of boredom.