I would be fine dropping Cain for Parnell. I would probably hold off dropping Ryu just yet. Still a lot of ST left and I would give him another week or two before kicking him to the curb. Not sure I agree that Marmol will be traded before the season. I see him being dealt at some point but spring training trades don't happen all that often.
Thanks man! You're right it may be too early to cut Ryu loose. He's got good stuff maybe he's having a hard time transitioning to life in the states so I'll give him a little more time.