Potomac Valley's P.G. Lakers 14-and-under basketball team of the AAU/USA Junior Olympics defeated Golden Eagles of Memphis, 97-83, in a first-round game in Bellevue, Wash. Charles Harrison scored 24 points for the Lakers. On Sunday the Lakers defeated Southern Louisiana, 77-66 . . .

The Columbia City (Md.) United boys under-16 soccer team won the National Challenge (Niotis) Cup Sunday by defeating the St. Louis Busch Club, 1-0, in St. Louis. The Columbia team defeated the Dallas Titans in the semifinals, 3-2, Saturday. Whitney Keiller scored the only goal in the championship game, 15 minutes into the second half, assisted by Chris Williams . . .

In the Stoke Mandeville World Wheelchair Games in Aylesbury, England, Judith Smith, 45, of Monkton, Md., was one of three U.S. swimmers setting world records. She swam the IC 100 freestyle in 3:12.47 . . .

Andy Nicholas tied the game with a three-run homer in the eighth and Bobby Spencer scored on a sacrifice fly in the ninth to lift Washington over Detroit, 8-7, in the union printers' national baseball tournament in Kissimmee, Fla. Washington faces Boston in a second-round game at 10 a.m. today.