18. Jake Plummer
Plummer went from being the best young quarterback in the NFL to being the worst overall. He made the NFL All-Rookie Team after a series of excellent displays that had him in Offensive Rookie of the Year award contention. The former ASU star only played 10 games in his rookie year but made a big difference.

However, he did suffer a sophomore slump as his interception rate went way up. Critics slated him for taking too many risks instead of playing safe. Originally this was one of his best assets. However, he bounced back from this awful year to post his best year statistically for the Cardinals in his third season.