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Los Angeles Lakers get: Dwight Howard (from Orlando), Deron Williams (from New Jersey) and Amir Johnson (from Toronto).
New Jersey Nets get: Pau Gasol (from Los Angeles) and Jose Calderon (from Toronto).
Orlando Magic get: Andrew Bynum and a first-round pick (from Los Angeles), 2 first-round picks (from New Jersey) and a first round pick (from Toronto).
Toronto Raptors get: Mehmet Okur (from New Jersey), Steve Blake (from Los Angeles) and a first-round pick (from Orlando).
Why the Lakers do it: They get Howard and Williams (and Johnson to come off the bench). Why would they not do this deal?
Why the Nets do it: The Nets are likely to lose Williams, so they need to get something back for him. They get a star, in Gasol, who they can sell to the Brooklyn fans and Calderon to run the point and spread the ball around to Gasol and Brook Lopez. They also move the noncontributing Mehmet Okur.
Why the Magic do it: The Magic move Howard, who at this more is more of a distraction than anything else. They replace him with the second-best center in the league in Bynum and get several first-round picks they can use in the loaded 2012 draft.
Why the Raptors do it: The Raptors move the major contracts of Calderon and Johnson, bringing in the expiring contract of Okur and Blake to back up Jerryd Bayless.