Calling a free agent overrated or overvalued before he's signed is risky business. How do you know exactly how the market values a player until the market values the player? And what if you say a player is overrated at a certain number but then he signs for a lower number, or for fewer years? There's a price at which every player makes sense.
So instead of calling these free agents overrated, I thought it would make sense to point to the worrisome aspects of their skill sets. We have aging curves and projections to help us understand how players usually transition into the twilight of their careers, and that research does not affect each player equally.
Let's call these "reasons to worry." Each piece of research gives us a different reason for concern, but maybe the apprehension is the worst for a certain group of free agents.