I understand including Green in a deal for a center, but I would want that center to be a real difference maker - like, officially our starting center for the next 10 years and a player everybody is psyched to add to Rondo.
Green alone will not get that done, but we have the pieces to make that happen in the next year (before Rondo leaves during FA). Also, Green may not be the player we want to trade unless we are sure that Turner (and then Young) can solidify the SF role. KO/Sully or Bradley may make more sense since we have a little bit of redundancy at those positions.