Boston Receives: Butler, Miller, Stevenson, and Haywood
Washington Receives: Ray Allen, BBD, TA, Scalabrine, & Bos 1st Rd Pick
Why for Boston? Butler replaces RA in the starting lineup. Miller adds scoring, shooting, and ball handling off the bench. Haywood is a big body and good rebounder. He also would be a better fit playing alongside the perimeter oriented Sheed. We're forced to take Stevenson, but Miller and Haywood have expiring deals. Plus, Butler's contract expires after next season which does not impact our future.
Why for Washington? They save money (Butler & Stevenson), receive a first rounder, and get back an inexpensive young player (BBD) for next season. They are in full rebuilding mode and would have a huge amount of cap space with the deal and/if Arenas' contract becomes terminated.