Troy Smith
He was up against Darren McFadden, but Troy Smith bagged the Heisman award in 2006. The year after that, the Baltimore Ravens picked him during the fifth round. He only had the chance to start two games in three seasons, however. He went on to start six games for San Francisco, but he left the NFL in 2010. In August 2013, he signed a two-year contract with the Montreal Alouettes of the CFL. Despite this, they chose to release the player just a year into the deal thanks to his poor performance and team problems.
Robert Griffin III
In 2011, the BYU alum brought home the Heisman Trophy. NFL scouts went after him, but he ultimately committed to the Redskins. Early on, he performed very well as a member of Washington. Robert Griffin III also took them to victory at the NFC East Division. Unfortunately, things went downhill for him after a knee injury that also ruined the team’s playoff chances. He kept struggling after that, so the team decided to release him after the 2015 season. Too bad.