Dallas Mavericks rookie Cooper Flagg felt firsthand how helping to initiate an NBA offense can be a physically demanding task.

The #Mavs are shutting down Cooper Flagg for the remainder of Summer League, a person’s familiar with the decision confirms. Flagg averaged 20.5 points, 5 rebounds, 2.5 assists, 1.5 steals and 1 block in his two games against the #Lakers and #Spurs. @TheSteinLine was first.

The Dallas Mavericks are shutting down Cooper Flagg for the remainder of the NBA summer league, sources confirmed to ESPN's Tim MacMahon, ending the rookie star's Las Vegas stint after just two games.