As we head into fantasy football championship week, there’s a chance that Miami Dolphins running back Raheem Mostert, who is tied with San Francisco 49ers running back Christian McCaffrey for the most touchdowns scored by a player at the running back position (21), may be unavailable. If Mostert is inactive in Week 17, De’Von Achane and possibly even Jeff Wilson could see a significant increase in playing time. In recent weeks injuries have helped to make backup running backs like Las Vegas Raiders running back Zamir White and New England Patriots running back Ezekiel Elliott among the leaders in fantasy production from the position. We’ll identify a few other running backs who have had to take a lead role in their team’s...