It seemed almost inevitable at the start of the season. The Sooners running back unit was one of envy nationally. Led by the monster combo of Samaje Perine and Joe Mixon and bolstered by worthy back-ups Rodney Anderson, Daniel Brooks and Abdul Adams, records were made to be broken on the ground this season. But no reminders are needed of how thin that depth had dwindled down to when on a chilly November night in Ames, Iowa, it was fullback Dimitri Flowers getting the bulk of OU’s carries late, as the Sooners were down four tailbacks that were expected to be part of the rotation entering fall camp.