Although, he admits it’s too early for him to name a leader of the bunch.
“You know, that's I'm hoping that happens,” Harbaugh said on finding a lead running back. “We're at the start of camp here. And there will be plenty of license and plenty of opportunity for one, two, three of our running backs to assert themselves, come to the fore and be counted on. That we'll be watching very closely and hoping that occurs early here in camp.”
But with only one football, and so many carries available, Harbaugh insisted three runners are what he would like to rotate this season.
“We would like to see a good solid three assert themselves,” Harbaugh said of his running backs. “Use three that are clearly the best three. That’s what you’re hoping for.
Isaac, who sat out last season after transferring from USC, may be the wildcard in Michigan’s running back competition.
His size alone – 6-foot-3, 240-pounds – Is intriguing in itself. But with lingering injuries this soring, he still has much to much to prove to Harbaugh, who has seen very little of him on the field this year.
“I feel like he is healthier than he was,” Harbaugh said of Isaac. “(I’ve seen) very minimal, he only practiced for a day.”
Adding: “Yeah, his size impresses us. … He certainly can use, yes. When has has the license and the ability to use it, yes.”