DDJ goes from the Royals to the A's for Vinny Mazzaro and Justin Marks . . .thoughts?

Overall, I think it's a decent deal for the Royals. Not a huge return, but Mazzaro is a major league ready RHP with some upside if he can figure out his secondaries. Eat some innings, transition those young arms in a bit more easily . . .okay, I can buy it. Perhaps this gives the Royals a bit more flexibility to pursue a Greinke trade (not that I'd advise it)?