Wasn't Boston on roids? Pretty sure I remember that ESPN cover of him "gaining" like 60lbs of muscle and keeping his speed. He later got busted for juicing.
I dont think there is any doubt. He had a foot operation early in his career was busted for DUI multiple times. This was the ESPN cover you speak of. picture hosting
Dude I was also going to mention Carr. Dude looked like he'd been doing some work in the weight room(When not holding the clipboard on the sidelines)
He was roided up and then got busted again for some kind of roid use later, I think. He also kept getting injured - both of which combined to basically end his career. I remember seeing that pic of him posted above and thinking to myself "that ain't human". I think his daily eating regimen was also bizarre. The last I heard of him, he was busted for beating up on some woman he was living with last year. Sad.