Plaxico Burress
Sometimes athletes shoot themselves in the foot with a terrible decision. Burress took this to the next level by unloading his pistol into his leg inside a nightclub. The Super Bowl winner’s weapon went off and left him in agony as well as severe legal trouble. That’s because he didn’t have a license for the gun.

New York has some of the strictest gun laws in the nation and they threw the book at him. He spent 20 months in jail for his troubles and wasn’t the same player when he returned. It was a career-defining moment because he tarnished his legacy and damaged his prospects with one bullet (via Sportscasting).