Emmitt Smith
Smith was one of the NFL’s greatest running backs and had an outstanding career with the Cowboys. He had a ferocious winning mentality and won three Super Bowl rings. But he also demonstrated extreme toughness over and over again. In 1994, he played through a separated shoulder as Dallas won the NFC East.

He attached a thigh pad to his shoulder to protect it, but it was still torture. Nonetheless, he had the gutsiest performance of his career. Smith refused to exit the field and had a crucial role in the game-winning drive. Most people think football is only a sport but Smith treated it like the most important thing on earth (via Dallas Morning News).