03:57 PM ET 12.13 | Carolina Panthers running back Jonathan Stewart (ankle) missed another practice on Thursday and is doubtful to play against the Chargers in Week 15. Stewart has missed the last two games with injury, after rushing for 336 yards and one touchdown in nine games this season. In his place, DeAngelo Williams has carried the ball 29 times for 123 yards in the last two games. Williams added two catches for 56 yards and a touchdown on Sunday against the Falcons in a 30-20 Carolina victory. Overall the Panthers have struggled to run the ball this season, with Stewart averaging 3.5 yards per carry and Williams averaging 3.6 yards per carry.