When you play in the NFL, you're not really playing that much at all, are you?
Football at that level isn't so much a game or a sport as it is a battle. A hard fought battle for every yard out there. And only the tough men need apply.
As we approach the end of another season, we at Bleacher Report felt it was a good time to look back and recall some of the men that have made this league what it is. They are the giants whose shoulders today's greats stand on.
Here is a list of 25 of the legendary gladiators of the gridiron.