Blount's injury was a rest and recovery injury that didn't need surgery. If he comes back, he's the team's only workhorse back, because you don't want to put Lewis in that position again when he's coming off of the ACL surgery.
1DRB - Blount
3DRB - White
1-3DRB - Forte
AthispaceRB - Lewis
FB - Devlin
ST - Bolden
That would set up as a 6 man backfield. In terms of cuts from there, I would think White would be more threatened by Forte than would Blount, but that's me trying to get into the team's collective head about Lewis.