Mavericks’ Cooper Flagg climbs up all-time NBA list after surpassing Kevin Durant

Given how good Cooper Flagg already is, it’s easy to forget that he’s yet to turn 20 years of age. The 19-year-old, whose birthday is on December 21, 2006, is blossoming into a legitimate superstar for the Dallas Mavericks right before our very eyes, and something higher up there than the sky appears to be the limit for him. Flagg…