Williams was carted to the locker room in the fourth quarter of Sunday's 37-23 loss to the Seattle Seahawks.
Williams had seven catches for 86 yards and a touchdown before departing. Williams has 37 catches for 495 yards on the season, the latter tying him for No. 10 in the NFL. He's also hauled in three touchdowns.
Williams has helped pick up the slack for Keenan Allen, who had been out since Week 1 with a hamstring injury. Allen returned against the Seahawks.
The Chargers have a bye in Week 8.