Sean Payton
The head coach of the New Orleans Saints has enjoyed a great head coaching career. He was instrumental in his teams 2009 Super Bowl victory. His surprise onside kick call to open up the second half shifted the momentum and helped the Saints defeat the favored Indianapolis Colts.
His involvement in the Bountygate scandal has become a major blemish on his legacy. In 2012, Payton was suspended for an entire season after it was proven that he was aware the bounty program implemented by defensive coaches, which incentivized players to intentionally injure opponents.