Marcus Coker is Iowa's 1st-string RB (281/1384/15 + 21/157/0). A very respectable season, if you just look at the statistics in a vacuum. Two things inside the #'s : his 4.9 yards-per-carry average isn't special in comparison to other RB's who got the lions share of carries for their teams. Also, the combined average yards per carry given up by the opponents he faced was only 4.9 as well - meaning that Coker performed at a very average level given the quality of the defenses he faced. Yes, he put up a gaudy statistical season, but a truly special back, a difference maker, would have had a ypc average higher than the average ypr given up by his opponents. That's a very solid statistical key on which to 'true up' stats vs situations, which is a pretty valid predictor of impact and future performance.Second, Iowa, especially under Ferentz, traditionally recruits and signs very solid RB's, carries a nice stable, and works to develop a succession plan at the position to offset injury/suspensions, early outs and graduations. Although relatively untested, its very reasonable to assume, given their history, that Coker's backups are solid enough to approximate Coker's production (which, when evaluated in relation to the rushing defenses he faced, was pretty much the definition of average) when given the opportunity.So that's why I think Coker's absence, due to suspension, is over-rated in terms of it's impact on the game.