here is my take
1 - TJ Yeldon: Has freakish burst, second level speed. is true breakaway runner with size which is rare. Needs: Needs to get stronger physically, mainly to endure the increased work load. As he number one he will face fresher defenders. Staff needs to avoid over working him early in the season.
2 - K. Drake: Is electric with the ball in his hands. Very elusive and has some speed. Needs: needs to get bigger and stronger, fumbled more than once, needs to improve pass blocking. He gets the nod for the #2 spot by default since nobody else has carried the ball in college who isn't recovering from a blown knee.
3. ?
4. ?
5. ?
Candidates
true freshman Derrick Henry, a jumbo athlete who broke the national all time yardage record for a running back. He will begin at running back. At 6' 3" 243 pounds with true top level speed he is a bit of an oddity. He looks a bit like cam Newton with the ball in his hands and did run the wildcat for his high school a good bit. Questions remain how he will translate to the college game
Jalston Fowler: technically an H-Back Fowler blew a knee last year and will attempt a comeback. Were it not for the injury he would likely be the #2 back.
Demetrius Hart: Unfortunately two blown knees makes his future a real question. He was actually taking caries away from Yeldon when he went down. Real shame.
Those guys will all be there this spring then this fall three more hopefuls join the fray.
Altee Tenpenny: 5' 11" 200 lbs. Very strong, very elusive. He reminds me of Mark Ingram. The best classic power back in this class. With or without Henry Tenpenny will most likely be a star running back at Alabama.
Alvin Kamara: 5' 10" 192. More of a third down utility back. Could play slot receiver as well. I really think we will see him return the Roy Upchurch sort of thing to our offense.
Tyren Jones: Smaller scat back with good power for his size. He will likely replace Hart's roll in the offense, either now or later depending on Harts ability to return.