Chris Chandler
The Colts made Chandler a third-round pick in 1998 but he never convinced his coaches. This is a common problem for backup quarterbacks across the NFL. They’re constantly grinding for their job and trying to earn a roster spot. He also had a miserable time with Tampa Bay and the Oilers.

But everything changed when he joined Atlanta. Suddenly, he appeared to be a genuine starter and earned back-to-back Pro Bowl selections. He also led the Falcons to a franchise-first Super Bowl appearance. They didn’t win but it was a dramatic turnaround and one of the greatest NFL career revivals (via SBNation).