Michael Vick
Vick was an American sports hero but became one of the nation’s biggest villains. He had an inspiring story because he emerged from a tough childhood to become the NFL’s best running quarterback. The Falcons drafted him after a great career at Virginia Tech and he reinvented the quarterback position with his rushing skill.

But then a federal investigation uncovered that he was the leader of a dog-fighting ring. Vick went to jail in 2007 and spent almost two years behind bars. Many people despised him because of his cruelty toward animals. However, he received a second shot in the NFL but never reached the same level (via MSN).