Who should i start for fantasy football as one of my running backs?

ok so this week i was planning on putting mike tolbert in as my starting running back but nfl is saying that hill get no points. is he hurt or something he's playing the Oakland raiders which should not be hard for the chargers. or i could put my back up knowshon marino btw is he hurt or not someone tell me help my teams in a 2 lost slump and i want my winning record back help