I have a hard time putting anyone on the list that got hurt. That just isn't fair. Also isn't fair to count guys well past their prime. Everyone gets old.
Someone not mentioned yet was Jerry Stackhouse had a pretty fast fall. I mean he went from being the 2nd leading scorer to dropping 8 ppg the next season, followed up by around the same, but hten dropped 8 ppg again. I know he got hurt during that 2nd drop, but not during the first one.