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 ...

Dallas Mavericks forward Cooper Flagg (32) is congratulated by teammates Jaden Hardy (1) and Dereck Lively ll (2) after scoring during first half action against the Charlotte Hornets. The two teams ...