VANCOUVER — Cooper Flagg, with beads of sweat dripping from his dark brown hair, gave himself a pep talk shortly after his first official NBA practice. “Day one in the books!” he said. Dereck Lively ...

Cooper Flagg (32) reacts to a made 3-pointer during the Dallas Mavericks' preseason opener Monday night against the Oklahoma City Thunder. (Stacy Revere / Getty Images) FORT WORTH, Texas — The Dallas ...

The Dallas Mavericks' Cooper Flagg warms up before a preseason game against the Charlotte Hornets. Tim Heitman / Getty Images There was little suspense about what the Dallas Mavericks would do with ...

Cooper Flagg made his first appearance in a (non-summer league) NBA jersey on Monday, when his Dallas Mavericks annihilated the shorthanded Oklahoma City Thunder, 106-89. Individually, Flagg may have ...

Cooper Flagg’s "Welcome to the NBA Moment" wasn’t his first missed shot, an alley-oop attempt that clanked off the rim and would’ve been the first points of the game. It wasn’t the time he tossed a ...