Michael Vick
Mike Tyson
Are two that immediately come to mind.
both players in a blood sport though, so doing some thugged out shit like bite a brothers ear off, rape a chick and throw some dogs into a blender not as likely to offend the folks who liked them originally?
biking seems a bit too libturd-euro-faggy to fancy having back a raging dickhead liar. but then again maybe folks'll want him back just to take pleasure in seeing him beat?
I didnt see where you said Lance would get back into cycling. My examples were more towards returning to stardom of sorts or some semblance of success.
Another example: Tiger Woods. While none of these guys have reached the stardom they had before, they've certainly mounted a comeback.