Brassell - depends on the position he plays. If it is WR, he could probably help immediately. If DB, he may be behind Whitley/Mitchell/Banks/Broomfield but still potentially get in the rotation.
CJ Johnson and Dee Arrington could both factor in at LB. They are both physically mature and that is a position of need.
Joe Morrow - based on size alone and our lack of a big WR could be a factor.
Darius Slay - JUCO CB, should factor in the CB rotation.
I don't think any of the RB commits will play right away (Robinson, Scott, Price). None of the OL (which is normal), nothing at DL (yet - I am talking to you Leon Mackey), Whitehead probably has the skills but is at a stacked position.
I really hope Johnson and Arrington come ready to play, but I am encouraged by the play of Hunt and C. Hughes, so hopefully we have some options at LB already on the roster. I wish we could find another C. White in JUCO somewhere.
It is hard to predict these things. I really thought Carr was going to make an impact as a freshman like Bumphis did, but we have yet to see that.