Why the Clippers do it: Without the picks, it is a buy low situation. Harden, Kawhi, AD when healthy are a pretty damn good trio. They have nothing to lose.

Why the mavs do it: They want to restructure their payroll. They cannot miss the playoffs and still be in the second apron. They want to avoid the repeater taxpayer penalties. Is pairing twins nice? Bringing DJJ back to Dallas will create one of the best defensive line ups in the league. (Lively, PJ, Flagg, DJJ, ...)