Xue
Footballguy
http://www.grantland.com/story/_/id/8190917/breaking-numbers-game-ground-pounders
If you look at the table Foster is only at 4.3 YPC. It's clear Tate is the superior runner. Although, Foster definitely is one of the best receiving backs in the NFL....it's also worth noting that Tate averaged 5.8 yards per carry on his 66 carries in these situations. [1st and 10, 14 points or less margin]