Mason (hamstring) is listed as questionable for Saturday's contest versus the Commanders, Nick Wagoner of ESPN.com reports.

EDGE Analysis

A late-week addition to the 49ers' injury report, Mason relayed to David Lombardi of The Athletic on Thursday that his hamstring tightened up at Wednesday's practice, which resulted in him being removed from that session and ultimately going down as a limited participant to end Week 16 prep. If Mason isn't 100 percent or out Saturday, Tyrion Davis-Price and/or practice squad member Tevin Coleman would be the main candidates to get work behind the 49ers' No. 1 running back Christian McCaffrey.