Shawne Merriman will play at Oakland

Oakland -- San Diego linebacker Shawne Merriman is active and he is expected to play Sunday against the Raiders.

Merriman suffered a calf injury two weeks ago at Seattle and hasn’t played since. He was warming up on the field in the past hour and he looked to be moving well. The Chargers are thin at linebacker and will need Merriman to stay on the field.

Running back Mike Tolbert will start in place of rookie tailback Ryan Mathews again as Mathews is still coming back from an ankle sprain. Tolbert had 100 yards rushing last week.

Right guard Louis Vasquez is inactive for the second straight game because of a knee injury. He did practice Friday, giving the team hope he could play, but he will once again be replaced by Tyronne Green.

As expected, Oakland will be without running back Darren McFadden because of a hamstring injury. He was ruled out Friday. Michael Bush will make his first start of the season.

Guard Robert Gallery is out for the fourth straight game because of a hamstring injury. Oakland has activated No. 3 quarterback Kyle Boller. Thus, he is not the emergency quarterback and there are eight other inactive players.