19. Daunte Culpepper
Culpepper is one of the most unfortunate players on this list because in another life he would have had a few more great seasons than he managed. He made the Pro Bowl three times during his time with the Minnesota Vikings before disaster struck. The talented quarterback blew out his knee and was never the same player again.
It was a massive shame because he was excellent before this. However, the injury ended his Vikings’ career and he went on a tour of the NFL. Ultimately, his career ended with a whimper as a member of the Detroit Lions’ 0-16 roster. In the NFL, a career can change in a split-second.