Jim Plunkett
There’s no doubt that Plunkett hung on for too long as an NFL starter. The former Raiders quarterback won two Super Bowls with the franchise despite posting mediocre numbers. Meanwhile, he regularly suffered over 35 sacks per season and they took their toll on him.

Now he suffers from Bell’s Palsy and lives every day in a state of pain. It’s a tragedy because he could have avoided some of this damage if he retired earlier. He dealt with a lot of injuries for the last couple of seasons of his career. Unfortunately, some players don’t know when to quit (via Mercury News).