The Dallas Mavericks got a promising sign from rookie Morez Johnson Jr., and Cooper Flagg made it clear how impressed he was.Johnson put forth his best NBA performance Friday, Nov. 6, grabbing 17 rebounds and scoring 13 points in Dallas’ 112-100 win over the Utah Jazz.The 20-year-old secured 10 offensive rebounds and recorded his first […] The post Mavericks’ Cooper Flagg Sends Strong Message on Rookie After Career Night appeared first on HEAVY.