24. Matt Ryan
Ryan’s slump definitely isn’t the worst on this least but it is one of the most interesting. After an excellent rookie season, his numbers noticeably declined. His pass completion rate dropped from 61% to 59% while he threw three more interceptions than in his first year.

Sometimes rookie quarterbacks struggle a little bit in the second year because opposing teams have a better understanding of them. Perhaps it’s a bit much to say Ryan struggled, but this was definitely his worst year statistically. A year later he bounced back and made the Pro Bowl after helping the Falcons win the NFC South.