some more examples of guys who were KO'd early in their careers or had bad starts.
Bernard hopkins lost his first pro fight, then about 20 fights later lost to Roy Jones. No one really thought that much of him. Of course he went on to become one of the greatest middleweights of all time.
Jimmy Young went 7-4 at the start of his career. Then ended up beating guys like George Foreman, Ron Lyle and went the distance against Ali.
Archie Moore suffered a first round KO against a little-known fighter midway through his career.
Joe Bugner was knocked out in his first pro fight by a journeyman.
Carlos Monzon lost 3 and drew 3 of his first 20 bouts, then went on an insane winning streak, never losing a notable fight in his career and of course becoming one of, if not the greatest middleweight of all time.
pipino cuevas had a record of 17-6 when he got a shot at the WBA welterwieght belt (everyone thought he would lose, he was handpicked by the champion) he won in an upset, and defended the title 11 times.
Israel Vazquez was TKO'd in his 10th professional fight by an unsung journeyman named Ulises Flores(9-6-0 at the time) who ended his career with a record of 14-12-1.
Wladimir Klitschko bounced back pretty well from his 3 TKO losses to Puritty, Sanders, and Brewster. Even his brother Vitali told him to retire. Hasn't lost since.