Rosario's got a split contract, he can be sent to Rochester without being DFA'd. He's also getting up to $4 million this year, which as we know matters more to our fine ownership than his .122 or whatever it is batting average.
Call is the most likely. Would love to see Wood, and hope I'm wrong, but I think Mini Me and Rizzo are already haunted by the sounds of a service clock alarm and ticking that resembles the intro to Pink Floyd "Time".
Wood would get an extra year service time if he's not near the top of the RotY voting at this point. He'd surely be a super 2, but that generally has not been something they've tried to manage before. Even after the Alu DFA, there's still deadwood on the roster like Willingham, so it's possible they pull the plug on him rather than release Rosario. They can probably 60 day IL Brzycky.
The double move of Wood and Call makes the most sense now, then send Call back down when Garrett or Robles is ready.