Knicks' target Kyrie Irving hasn't spoken to Jimmy Butler since 2016Both are set to become free agents next season9/22/2018, 2:00 PMAdam ZagoriaFeb 18, 2017; New Orleans, LA, USA; Eastern Conference guard Jimmy Butler of the Chicago Bulls (21) and Eastern Conference forward Kyrie Irving of the Cleveland Cavaliers (2) talk during the NBA All-Star Practice at the Mercedes-Benz Superdome. Mandatory Credit: Bob Donnan-USA TODAY Sports / Bob Donnan