When ranking at the greatest running backs of all time, where do you begin. Is Emmitt Smith the greatest running back ever simply because he ran for the most yards?
How do compare apples to apples when figuring Jim Brown, Gale Sayers, and Bo Jackson into the conversation because they didn't play "full" careers?
Can you factor in current players who only have a short body of work like Adrian Peterson?
Obviously, statistics play a huge part in determining just how good a player is. Not just career yardage, but yards per attempt, yards per game, and touchdowns play a bigger part in this discussion.
Catching the ball out of the backfield is important as well as it now makes you a more dangerous player. All of these factors should be considered when trying to rank these players. So, enough of the criteria.
Let's get to the rankings.....