I'll add in Olajuwon. He should've retired after first finding out he was being traded to the raptors. He was already in the twilight of his career, and in Toronto he averaged 7 ppg, and ended it in a toronto uniform.
Ricky Henderson... didn't hit very well towards the end. He was basically there for flash and to run the bases.
You guys have to realize that it's not easy to walk away from the sport you love. Sure, these guys declined it talent and success, but it shouldn't ruin their legacy just because they wanted to continue to have fun playing their respective sport.
Deion Sanders: We all know he just couldn't help himself from returning to the Ravens for the '04 and '05 seasons. He was not able to be the same player and we all know why, I think he sort damaged his HOF potential at this point because of a few weak seasons.
I think you should add Patrick Ewing. His knees were so bad he made a joke out of himself towards the end. Also Jose Canseco was a bit of a joke when he came back and played in the minors then on like a MLB team for a couple of months or somethin'....