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Aside from Trent Richardson and Chris Polk, all of the running backs in the 2012 draft class are lacking size.
Lamar Miller, David Wilson and LaMichael James are all speedy backs but are too small to carry the ball 20-plus times per game.
Listed at 5'9" and 215 pounds, Doug Martin out of Boise State also belongs in the "small backs" category. But after the Senior Bowl, he looks like he is the most complete back out of the bunch.
He runs low to the ground with a great deal of power. Martin is tough to bring down and is always fighting for extra yards. He utilizes a sneaky spin move which helps him find space when it seems there is none.
This week at the Senior Bowl he also looked decent in pass protection and catching the ball out of the backfield, which will help his draft stock tremendously.
It will be interesting to see if his performance this last week was enough to move him up the boards and into the second or early third round.