Chargers running back Ryan Mathews, who is listed as questionable for Week 15 vs. Denver due to an ankle injury, is highly doubtful to play Sunday, a source told NFL.com National Insider Ian Rapoport. Mathews was not able to do much in practice during the week.
Mathews has been limited to six games this season due to injury. Donald Brown and Branden Oliver would likely pick up most of the slack in the running game, if Mathews is sidelined.