Packers RBs coach Alex Van Pelt confirmed that RB Cedric Benson won't play on 3rd-downs.  "Eventually, you'd like to see Cedric be in position to stay in there for all three downs," Van Pelt said. "But I don't think he's done a lot of third down. Obviously, we've got a couple different plans on who the third-down back could be."  Van Pelt went on to mention John Kuhn, Brandon Saine, and Alex Green as 3rd-down options.  Benson's short-comings on passing downs will limit his snap totals in Green Bay.  It's the biggest reason we're leery of relying on him as a fantasy starter.