INJURY UPDATE: RB Kenjon Barner was cleared from concussion protocol and practiced on Thursday. Left tackle Russell Okung did not practice due to a sore left ankle, and Chargers head coach Anthony Lynn indicated he's taking a cautious approach with the Oklahoma State product. And right tackle Joe Barksdale appeared to suffer a left ankle injury at the end of practice. Cornerback Casey Hayward did not practice due to a hamstring strain. Melvin Gordon and Travis Benjamin were in full pads but given rest days on Thursday. Others who did not practice on Thursday included DE Chris Landrum (shoulder), DE Jerry Attaochu (hamstring), C Trovon Reed (hip strain), CB Craig Mager (unknown), TE Sean McGrath (knee), TE Jeff Cumberland (legs) and Denzel Perryman (ankle). WR Mike Williams remains on the physically unable to perform list with a lower back disc herniation.