The Steelers will have to finish their Week 12 game against the Colts without one of their top offensive playmakers.Running back Najee Harris has been declared out for the remainder of the game after suffering an abdominal injury, .It isn't Joe Musgrove Jersey clear exactly when Harris suffered the injury, but he was seen walking gingerly on the field and eventually headed to the locker room before the end of the first half, despite the Steelers having the ball.LIVE:Harris carried 10 times for 35 yards and a touchdown before exiting the game. He also had a 4-yard reception on his lone target of the contest.With Harris out, the Steelers will have to turn to their Colin Moran Jersey running back depth. Their usual Bryan Reynolds Jersey backup, Jaylen Warren, is out because of a hamstring injury, so they're down down to their third- and fourth-string options with Harris sidelined.MORE: Below are the running backs the Steelers have available for their "Monday Night Football" game against the Colts with Harris now out.RankPlayer1Benny Snell Jr.2Anthony McFarland Jr.Snell has been Pittsburgh'sthird-string running Chris Stratton Jersey back this season while McFarland was elevated from the practice squad for Monday's game. The duo got relatively equal work in the first half.Snell is a big-bodied back at 5-10, 224 pounds, so he will probably be used as a between-the-tackles and short-yardage runner. McFarland is more explosive at 5-8, 193, so he will probably see action on third down.MORE:If Harris ends up being Blank Jersey out long term, the Steelers will probably turn to Warren (if healthy) to lead their backfield. The rest of Monday's game should show exactly what roles Snell and McFarland can play in the backfield.