Ike Ibeabuchi, he was a title holder when he got in trouble....he at the very least had fights vs Lewis and Holyfield ahead of him, maybe Tyson as well, who knows.

Johnny Tapia I mean how could he NOT be listed here?

'Kid Dynamite' Danny Romero is another than never reached his potential

Kelly Pavlik, alcohol abuse did a number on him

Meldrick Taylor, super slick boxer but just CHOSE to go to war, really hurt his career.

Any number of drugged out wash-ups especially heavyweights of the late 80's early 90's