I have seen it reported both ways, that the second rounder is coming or going from Boston. My guess is Boston is actually GETTING a second rounder.
But let's not get too excited. It is almost certainly one of those heavily protected ones that will never actually change hands.
This would just be a necessity to make the deal work with Memphis using a TPE to absorb Lee. It is a quirk of the CBA, that if you are using a TPE, you still have send out something in return for the player...and Bayless wouldn't count, because he is essentially in a separate trade from Memphis' end.