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 ...

Dallas Mavericks forward Cooper Flagg (32) shares a light moment with teammates during warmups before the start of a preseason NBA game against the Charlotte Hornets at American Airlines Center in ...

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’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 ...