Williams (ribs) remained sidelined at practice Thursday, Nate Taylor of The Athletic reports.
Williams is dealing with sore ribs and back-to-back absences cloud his status for Sunday's game against the Raiders. He'll presumably need to practice in some capacity Friday in order to have a chance to suit up this weekend. If he's out or limited against Oakland, Darrel Williams and LeSean McCoy would be in line for added backfield touches in Week 13.