You said Hits and OBP so I don't see how you dont have Adrian Gonzo as your #1 Keeper much less whom you're debating for 5th? Gonzo raked in 2010/2011 and last year in a cancer of a team didn't. Now he will begin anew, back in LA. Gonzo will be back to raking again and who knows maybe even touch 40hr again?
Getting Cain was great for your staff. losing him for Castro is an equal type of trade. but you should know Rutledge is going to be a 2nd tier level 2b/SS and between Kipnis and redrafting Rutledge, having Cain would be a bigger advantage over Castro now and letting go Rutledge.