3. Sam Bradford
Does it count as a slump if your rookie season was bad too? Well, in this case, we are going to say yes, because Bradford totally fell off of the wagon in his second NFL season. To be fair, the Rams were poor when he joined them with a shoulder injury from his time with the Oklahoma Sooners. But at least he showed some promise.
Then he just went into total decline. It was like leaving a book outside in the rain. So much promise but you can never get to end because it turned into a wet pile of mush. His pass completion rate dropped by seven percent to 53 as he threw the same number of interceptions as touchdowns (6/6).