Los Angeles Chargers wide receiver Mike Williams, the No. 7 overall pick in this year's draft, is slated to make his NFL debut next week against the Oakland Raiders, barring any setbacks at practice this week, league sources told ESPN. Williams, 23, has already been ruled out for Sunday's game at the New York Giants as he deals with a disc injury in his back. The injury has caused him to miss training camp and each of San Diego's four games this season. Ever since Williams' injury flared up in the summer, the Chargers had planned to sit him out until Week 6. Williams has been practicing in pads since Week 2.