J.P. Losman
The Bills spent two decades trying to replace Jim Kelly without success. They thought that they struck gold when they drafted Losman in 2004. Remember, there were some outstanding NFL quarterbacks in this class. Eli Manning, Philip Rivers, and Ben Roethlisberger all entered the league this year.

A freak accident in his rookie season summed up Losman’s Bills’ career. His teammate ran into him and broke his leg as he lost momentum. 2006 was his best year because he started every game but had poor weapons. Losman disappointed the fans because he wasn’t the player they thought they were getting (via Bleacher Report).