Roster decisions should be interesting this week. The whole of the inactive list sans QB3 could be injured guys. Stanley, Linderbaum, Oweh, Humphrey, and Williams are basically sure outs at this point. Hill and OBJ might have a shot if they can make it back tomorrow.
With that, Moon is probably going to be elevated, and at least 1 if not both of Gordon and Drake will need to be added. If you need both, you're probably forced to make a roster move somewhere. Not necessarily as a true RB, but you wonder if Duvernay (with his end around usage) is de facto and emergency RB3 if they don't want to make a 53 man roster move.