I wouldn't do it. Greinke has upside moving to the NL and a contender, while JJ has injury concerns.
But I guess if you want to make a trade for the sake of making a trade, it's alright.
OF- Myers Jennings Heyward
U- Ellsbury, B. Upton, Bruce
SP-Price Fernandez Miller Wheeler, Kluber
RP-Grilli, Farquhar, Crow, Veras