Think about this: Gore started the first game, Shady started the second game, and McDermott says we'll get an extended look at both of them tonight and then the other backs will fill in from there. This sounds a lot like a winner-take-all RB competition, kind of like the QB competition was run last year by McDermott in preseason.
Is it becoming likely that the loser of this battle will be cut, leaving only one as the veteran RB? Maybe the Bills kept them both imagining that one might get hurt and the problem would solve itself. But now with both healthy, one will have to go the hard way. Call me crazy, but I have a feeling both of these guys aren't on the roster after cut-down day.