Each of those guys had what I call a freak game. Take out that game for each player, and then see where they stand.
That leaves the following:
Ivory - 89 carries, 328 yards, 3.7 ypc 1 TD
Thomas - 90 carries, 326 yards, 3.6 ypc 0 TD
Sproles - 34 carries, 118 yards, 3.5 ypc, 1 TD
Robinson - 26 carries, 118 yards, 3.6 ypc, 0 TD
Ingram - 27 carries for 75 yards, 2.8 ypc, O TD
So Ingram outside of the inflated stats from the Dallas game is worse than all the others with each players best game taken out.