Doubtful. Not if, as Keeper stated, the Sox are acquiring both. It just doesn't work like that. When you trade for an already established elite player, you are giving up your best, brightest, and closest to MLB ready prospects.
Look at the Teixeira to Atlanta trade for reference. Texas got Saltalamacchia, who was Atlanta's best prospect at the time, + Neftali Feliz and Elvis Andrus, two guys with tons of talent who were at lower levels in their development.
Casey Kelly, at this stage of his development, is an add-on for a young established elite.