The Dallas running game is stuck in neutral without running back DeMarco Murray.
Then again, maybe it's a patchwork offensive line or a penchant for falling behind that explains the Cowboys having the NFL's worst rushing offense.
Murray could miss his seventh straight game Sunday against Philadelphia. The Cowboys have rushed for 100 yards just once in the six games without him. Murray sprained his right foot at Baltimore on Oct. 14, when the Cowboys rushed for 227 yards.
Because of injuries, the Dallas offensive line has had a temporary center and two backups starting. The Cowboys have also had to lean on Tony Romo because they've fallen behind by double digits in four straight home games.