Any upside to Le'Veon Bell backups?

It's late in the fantasy season but sometimes those of us in deeper leagues have to reach. RB Le'Veon Bell's head injury (in which he went momentarily unconscious) during the Pittsburgh Steelers' final touchdown drive could keep him out of at least one game in the future.

The rules concerning activating players who have sustained head injuries have been made more stringent. This doesn't mean a player who's sustained a head injury cannot play the next week but it almost invariably puts their status into serious question. Should Bell be ruled out of or limited in next Sunday's game against the Dolphins, can we expect backups Jonathan Dwyer or Felix Jones to generate meaningful production?