10 NFL Stars Who Didn't Know When to Hang Up the Cleats

10 NFL Stars Who Didn't Know When to Hang Up the Cleats 1 of 12

NFL greats all have a fiercely competitive nature, a strong work ethic and an unwavering belief in their abilities. This is what makes them able to compete at such a high level. Unfortunately, all too often an aging star will attempt to play in the league just a little bit too long. These players still had the drive, but the physical tools were there no more. Here are the top 10 NFL stars who just didn't know when to fold.