What RB will lead the pack in 2013?

Okay so we've got our coach. We know he likes to run the ball. Who will get the starting job in 2013?
I just watched film on Drew Harris, Trey Edmunds, and Chris Mangus, and we all know what JC and Tony G look like on the field (yes, I'm ignoring Michael Holmes).

JC Coleman: He's fast and dedicated as hell, he can make it through holes that very few backs can. On the downside, the coaches don't think he has the size to be an every down back.

Tong Gregory: He's been here a while, but never truly gotten a chance in the spotlight. I doubt that will change in his senior season.

Drew Harris: I like him. He is surprisingly fast for his size, and runs with purpose. He can break tackles, and is explosive in space. The only thing against him is that he is new, and missing spring practice is not going to help his case.

Trey Edmunds: Another powerful runner who has decent/average speed. He runs smart and finds holes pretty well too.

Chris Mangus: Surprised me in film. He needs to bulk up pretty badly, but he was fast and very shifty. He could stop on a dime and found holes well.

I suspect JC and Edmunds will split carries early in the season and will create a solid change of pace until Harris is game ready, but then who knows what will happen. I fear we may end up with another 3-4 back rotation, if one is not a complete stand out.