After school on a recent afternoon, Allonzo Trier, a sixth grader in Federal Way, outside Seattle, came home and quickly changed into his workout gear — Nike high-tops, baggy basketball shorts and a sleeveless T-shirt that hung loosely on his 5-foot-5, 110-pound frame. Inside a small gymnasium near the entrance of his apartment complex, he got right to his practice routine, one he has maintained for the last four years, seven days a week. He began by dribbling a basketball around the perimeter of the court, weaving it around his back and through his legs. After a few minutes, he took a second basketball out of a mesh bag and dribbled both balls, crisscrossing them through his legs. It looked like showboating, Harlem Globetrotters kind of stuff, but the drills, which Trier discovered on the Internet, were based on the childhood workouts of Pete Maravich and have helped nurture his exquisite control of the ball in game settings — and, by extension, his burgeoning national reputation.
One of the Web sites that tracks young basketball prospects reports that Trier plays with “style and punch” and “handles the pill” — the ball — “like a yo-yo.” He is a darling of the so-called grass-roots basketball scene and a star on the A.A.U. circuit — which stands for Amateur Athletic Union but whose practices mock traditional definitions of amateurism.