I hope Ervin or Stepp take a hold of the position and roll with it, this switching backs every other play will not work. Running backs need to get in a rhythm and the average to best ones get stronger as the game goes on. My personal feelings is that running back should not be hard position to come in and compete right away, if you got it you got it, shouldn't take 3 years in the system to get on the field. Also, every one clamors on and on about speed/power. Vision may be the single most important aspect to be a decent running back. Rex was good because he knew when to cut and when to hold behind his lineman for something to open up. I barely watched the spring game so cant comment on Yant yet. Rahmir doesnt move the needle, Thompkins is always injured, Scott and Morrison we haven't seen enough of to know. Play calling also needs to be adapted to get these guys the ball more and consistently.