St. Louis running back Steven Jackson plans to play on Sunday against Arizona on despite a thigh injury. Jackson used his website, which launched this week, to declare that he intends to play. "I want to let you all know that the leg is feeling good enough for me to go on Sunday," Jackson said in a post Saturday. "This is a big game for us against Arizona, and I'm going to give everything I've got to get us a win." "So to be clear: I am playing. Be ready."