Luis Suarez
Suarez was one of the most talented players in world soccer during his heyday. However, the Uruguayan consistently lived on the edge and resorted to the dark arts. There’s no denying that he intentionally committed a handball against Ghana in the World Cup. But other heinous actions were heinous mistakes.

One of his most career-defining habits was biting opponents. He infamously chewed on Italy’s Giorgio Chiellini as well as Chelsea defender Branislav Ivanovic. It’s bizarre that this was his automatic reaction to adversity but it tarnished his reputation. He received psychological counseling after the final biting incident (via Insider).