McFarland will make his NFL debut in Sunday's game versus the Broncos, Dale Lolley of DKPittsburghSports.com reports.
McFarland -- a rookie fourth-round pick -- was a healthy scratch in the season opener, a game in which James Conner sustained an ankle injury. Conner is healthy and expected to start against the Broncos, but McFarland will add depth and could serve as a change-of-pace back.