We know Nick Wilson is a phenomenal player, but the rest of the running backs are unproven. Which one will rise to the occasion?
Nick Wilson had a sensational freshman year racking up 1375 yards and 16 touchdowns, so the Arizona Wildcats know who their starter and workhorse will be. With the graduation of Terris Jones-Grigsby, however, we don't really know who his complement will be.
TJG had over 500 yards rushing last year, and someone (or multiple players) will have to replace that production. The running backs in position to do that are unproven, but certainly not talentless.