When it comes to playing football, "he's tough" is probably the best attribute a player can get.

Whether that means playing through multiple injuries, gutting out a late victory, playing multiple positions, or laying out some of the hardest hits in history, these players all left their heart and soul on the field each time they played. They knew how to intimidate their opponents and how to beat them with natural athletic ability and sheer physical prowess.

Here are the toughest, fittest, and most undeniably badass players in NFL history.