Despite Tom Herman’s confidence, there are question marks for Texas at RB

Photo by Tim Warner/Getty ImagesAfter essentially slumping into a sub-existence in 2017, the Texas Longhorns running back room enjoyed a fairly substantial step forward last season. Though the stats would suggest — and correctly so — that the ground game wasn’t much to write home about, ranking 98th in rushing S&P+ despite a record-setting effort from sophomore quarterback Sam Ehlinger, the productivity the Texas backfield mustered last season was leaps and bounds beyond 2017.

Two seasons ago, the four Texas running backs — Chris Warren III, Kyle Porter, Daniel Young, and Toneil Carter — amassed a mere 1,200 total yards. That four-man rotation was essentially cut in half last season with…