Houston Rockets forward Tarik Black (28) defends as Dallas Mavericks forward Harrison Barnes (40) tries to drive past in thesecond half of an NBA basketball game Sunday, March 11, 2018 in Dallas. It's only been two years since Harrison Barnes was the third-leading scorer and wide-eyed teetotaler flourishing in the Golden State Warriors lineup. In case you've forgotten, there was a time when some argued Barenes' upside and existing chemistry was a more sure bet than gutting the bench to sign Kevin Durant.