Mathews appeared to suffer a concusion on a 5-yard run in the second quarter, taking a knee to the head from an Oakland defensive player. San Diego coach Mike McCoy said that in order for Mathews to return to the field, he will be subject to passing the NFL's protocol for concussion testing.
Fluker did not appear to suffer an injury during the Oakland game but had his right knee wrapped as he watched practice from the sidelines. Nick Becton played right tackle with Fluker out.
The Chargers did receive good news, with left tackle King Dunlap getting the clearance from trainers to practice, after he missed two games with lingering concussion systems. Dunlap worked at left tackle with the first unit.
New offensive lineman Mike Remmers is wearing No. 60. New defensive lineman Lawrence Guy is wearing No. 71. New practice squad additions include tight end Ryan Otten (No. 82) and running back Kerwynn Williams (No. 30).