Chargers running back Donald Brown appears unlikely to play Sunday in Oakland after missing practice again Thursday. He has yet to complete concussion protocol, according to the San Diego Union-Tribune.
Brown has proven ineffective in extended opportunities this season. He has 126 yards on 59 carries for a meager 2.1 average. He averaged 5.3 YPC last year for Indianapolis. But he does have 12 receptions in 2014.