They aren't dealing enough to get a front line starter. Not gonna happen. 90% as effective for a RP is just below average for a RP, if that is your bar, they are already on the roster. They have plenty of "good" players, if you are dealing, you need to deal for better than good. That is going to cost players. If you won't deal, what is your plan for the logjam of DH/1B types that are on the 40 man after next year?