Let me begin this by clarifying my criteria for being overrated.
To begin with, overrated does not refer to a draft bust.
This is why the following players, or others like them, will not appear on this list:
Those players either never earned starting jobs or simply never lived up to expectations. To me, they qualify as total busts.
Also, overrated does not pertain to a guy that performs extremely well at his position but might not reach the unrealistic expectations of the national media or fanbase. Consider the following names:
Roy L. Williams (strong safety)
Those players either did or still perform at a very high level even if circumstances either have or did prevent them from either playing longer or appearing as deep into a given postseason as some would have liked.
To be overrated you have to create massive expectations, based on previous performance, that are eventually exposed as beyond reasonable or unrealistic—or perhaps simply a mirage.
I've heard the ridiculous argument that Hall of Fame quarterback Troy Aikman was overrated because he had Hall of Fame running back Emmitt Smith and numerous Pro Bowl offensive linemen in front of him.
But that's a completely ignorant idea based on very limited understanding of football as a team sport as opposed to a game like tennis or boxing.
So here's a look at some very overrated players whose star probably shined brightly at one time, but then dimmed greatly due to numerous different situations. Most players here are historical, but there's a couple still active as well.