16 Person League - Can't decide on RB2 for Conference Finals

[VinVinOK]

It's a 16 person league, so pickings are pretty slim in some areas, especially at RB. Here's what I have on my roster, plus a couple running backs that I could pick up right now:

Roster RBs: Adrian Peterson, Montell Owens, Bilal Powell, Curtis Brinkley, Toby Gerhart.

Free Agent RBs: Dexter McCluster (listed as RB/WR), Ryan Grant.

Obviously A.P. will be my RB1, but I can't decide on my second. Worst case scenario, I could pick up either Dexter McCluster who's listed as a RB/WR and could see some looks with Dwayne Bowe being out, or I could grab Ryan Grant if anyone thinks that he would be a better start.

Any help would be greatly appreciated.