I wasn't referring to JD, he has nothing to do with this, just this recent trade in general. He's turning 23 on 2/27th and he has options, they might think he needs more work in the minors and it gives them better depth. He's hardly pinned as a back-up MIF.
Edit: Lawrie was the centre piece by the way along with Graveman, Nolin and Barreto.