The days of the workhorse running back that dominates the ball seem to be dwindling. Consider that last season only five running backs legged out more than 300 carries, while a decade ago, in 1998, the NFL's RB leaderboard included 11 backs hitting the 300 mark.
In today's NFL, more and more teams are staying true to the numbers, specifically 300 (number of carries in a season that merit concern) and 30 (the hypothetical age when RBs start breaking down). The result the past several seasons has been the growing popularity of the RB-by-committee, which used to be solely out of necessity but now is deemed necessary by many teams in a league full of approximately 50-60 high-speed car wrecks per game for running backs.
Which teams are the most well-stocked at RB in 2009? For the purposes of our rankings, the goal for every team is to find two, if not three, guys who can come in and start in case of injury emergencies. In the best cases, each back can bring a unique talent and role to his team. And for RBs, youth — or more specifically lack of wear and tear — is more important than most other positions on the field. *NOTE: This list is for the 2009 season only.