Here are my predictions.
Jake Sharp has run the 100 meter in 10.4x before. He has a great 3rd gear. Jared Hawkins or Sharp have the best chance to play HB, b/c of their size /speed combination. Both are going to have to have at least a 1,200 yard year with almost 6 YPC followed by running a 4.45 or better to become...gasp...a mid round draft pick.
Gerhart likely, unless he wins the Doak award or something, will be made an athletic FB type weapon and will be a late round selection ala Peyton Hillis.
Roehl is a Division IAA player and probably won't be drafted at his size because he is too small for a FB. I smell Justin Beaver treatment, although Beaver was slightly more athletic, but in Division III.
Kevin Harris should transfer b/c he is getting no carries. Currently no shot at the NFL.
Kyle Bell, I hate to admit has lost something from his injury and has virtually no shot at getting drafted currently.
Kettani is a priority FA athletic FB prospect by NFL standards and will then have to go back to the military after a mini-camp tryout if he gets one.
Bolen might get drafted in the last 2 or 3 rounds as a FB.
I'm going to say Grothe has the highest stock at this point b/c the NFL likes to turn white running QBs into WRs.
White RBs are virtually banned no matter how good... although...(now the good news) I think McGuffie will be the first to make it through barring injury.