memphis will be over the salary cap by adding Perks' alone. this is one reason why memphis will consider trading Gay. and i think danny ainge would want to get more value for Perkins, as we all know how valuable he is during playoff. but if danny really wants to have 2nd pick, Perkins is the player who memphis wants.
btw, this trade will also free-up $2.5mm from celtics' roster.
obviously danny ainge would need to do some selling in order to get Rudy as well. so if walker is not good enough, he will need to adding another player or two.