Lennox Lewis-- Should have stayed for a Vitali rematch.

George Foreman-- Should have came back to try to win it 1 more time.

Roy Jones Jr. -- Should have stopped fighting flat-footed, retrained, regained his old style, and came back to decimate Tarver. Â If Johnson can give Tarver problems, he should be able to.

Naseem Hamed-- Should have tried to return Barrera the favor.

Marvin Hagler-- Should have came back to win against SRL, I hated the outcome of that fight.

I could go on and on.