6. Josh Freeman
The Tampa Bay Buccaneers thought that Freeman was their franchise quarterback and the early signs were good. However, his decline was swift. For two seasons he was solid, but then it all went downhill very quickly. In 2013, he completed less than 50% of his total pass attempts in three straight losses.
Then the Buccaneers traded him to the Vikings and things didn’t get better. His single start for Minnesota saw him complete just 20 out of 53 passes. It was horrendous. Freeman only played one more game in the NFL.