Curtis Brinkley set to play vs. Packers

SAN DIEGO -- San Diego Chargers backup running back Curtis Brinkley practiced Friday, his first session since sustaining a concussion Monday night at Kansas City.

That means San Diego has a back to spell starter Mike Tolbert when the struggling Chargers host the defending Super Bowl champion Green Bay Packers on Sunday.

Brinkley passed the NFL's official concussion test on Thursday and was cleared to practice and play. He is listed as probable and will play.

Ryan Mathews did not practice Friday and missed the entire week with a groin strain. He is listed as questionable on the team's injury report, but his odds of playing are small.

"I feel fine," Brinkley said. "I felt good shortly after the game, but they were being cautious. I am glad that I'm going to be able to contribute on Sunday."

Even with Brinkley active, Tolbert will take the majority of the snaps Sunday. While it's unlikely Mathews will play, the team refuses to rule him out.

In addition to Mathews, the Bolts listed receiver Malcom Floyd (hip) and inside linebacker Na'il Diggs (knee) as questionable. Outside linebacker Shaun Phillips (foot) is doubtful but will not play. Defensive end Luis Castillo (tibia) and guard Kris Dielman (concussion) are officially out.

Tight end Antonio Gates and WR Vincent Jackson are expected to play.