Draughn's teammate Carlos Hyde (foot) has been ruled out for Sunday's game in Chicago.
Draughn thus figures to handle another heavy workload, after playing every single offensive snap in a Week 12 loss to the Cardinals. He had exactly 20 touches in each of the last three games, as the 49ers don't seem to have much faith in their other backup running backs. The Chicago defense is allowing 4.8 yards per carry and 128.5 rushing yards per game this season.