The Pittsburgh Steelers will use a running back by committee Sunday when they face the Raiders in Oakland. Running back James Conner suffered an ankle sprain in the lsos to the Chargers and is out indefinitely. The running back group consists of Stevan Ridley, rookie fifth-rounder Jaylen Samuels and Trey Edmunds, who was promoted from the practice squad Tuesday. Conner’s injury could allow the Steelers to continue their pass-heavy trend in recent weeks despite back-to-back losses to the Broncos and Chargers.