J.R. Smith has had the biggest Box Plus-Minus improvement of all the players traded this season as he's become a critical part of the Cleveland Cavaliers success following his arrival from the New York Knicks.
Smith had a -4.3 BPM with the Knicks and +3.4 with the Cavaliers for a difference of +7.7.
Enes Kanter ranks second with a +5.9 difference since arriving to the Oklahoma City Thunder from the Utah Jazz. The Jazz have also benefitted from his absence as it has given more minutes to Rudy Gobert.
Will Barton, Mo Williams, Anthony Tolliver, Ramon Sessions, Timofey Mozgov, Iman Shumpert, Tarik Black and Goran Dragic round out the top-10.
Overall, the Heat have the best Trade Score at 6.10, ahead of the Charlotte Hornets at 5.90 and Cavaliers at 5.10. The
Brandon Knight has had the biggest drop since being traded, going from +2.3 with the Milwaukee Bucks to -4.0 with the Phoenix Suns. The Bucks replaced Knight's +2.3 with a -2.0 from Michael Carter-Williams and they have struggled since the trade.
The Dallas Mavericks are also one of the losers of in-season trades as Rajon Rondo has struggled and they also lost the production of Brandan Wright.
The Bucks have the worst Trade Score at -4.30 with the Mavericks ranking next to last at -3.70.