Which RB should I start in week 2?

If I were you, stick with Steven Jackson. He is a stud RB, I doubt his disappointing performance will carry over. I would also put in AP. I do not think Chester is going to start, or be healthy enough to steal many carries away from him. He should be able to tear the Lions apart. I wish I had him. Actually, I wish I had your RB dilemma overall. Good luck.