Williams (back) is listed as questionable for Thursday's game against the Raiders after being listed as a limited participant on Tuesday's and Wednesday's estimated practice reports.
Los Angeles is also listing Keenan Allen (hamstring) as questionable, with the two receivers' Week 15 statuses set to be confirmed upon the release of the Chargers' inactive list approximately 90 minutes prior to Thursday's 8:20 p.m. ET kickoff. If Williams is limited or out Week 15, added opportunities would be available for Tyron Johnson.