It is one of the most demanding positions on the field, extremely difficult to excel at because it requires a rare blend of size, speed, strength and stamina.
"It's hard, because if they come out and play two tight ends and just run the ball and double team you, you have to be able to stand up to that and then still rush the passer on third-and-6," Dungy said. "And then you have to do that for 50 or 60 plays.
"So, it takes someone truly special to do it, but Warren could. He could dominate you in the run game and, obviously, in the pass game and there just weren't many guys like that."