celtics send Bass + Lee + Crawford
Rockets send Lin + Greg Smith
This trade clears some of the Cs roster log jam. While Lin is a super over payed backup PG he comes of the books before Lee saving money in the long term. Smith is a decent very young center who would become the likely 3rd member of the Sully, Olynyk rotation.
For the rockets, they gain a starting Pf in Bass who will fit in very nicely with their current team. Lee becomes their first guard off the bench and Crawford an scoring bench spark. They are left without a true PG but still have Asik to flip to fill that hole.