The Potomac Jets, the Washington area Police Boys and Girls Club basketball team that won last year's 14 and under division, will try to repeat this year in the 15 and under division in the 16th annual Amateur Athletic Union-U.S.A. Junior Olympic games Aug. 4-8 in Memphis. More than 3,000 athletes are expected to participate in 13 sports.

Central High School in Capitol Heights will provide a couple of repeat performers from last year's games at Wake Forest. Robin Benjamin, the Maryland state indoor and outdoor champion in the 100- and 200-meters, won the silver medal in the 100 last year. This year she's chasing the gold in the same events.

The 16-year-old Metro Express runner will be joined in Memphis by schoolmate Karen Woods. Woods, 17, placed fourth in the 400 hurdles last year and was part of Central's mile relay team that broke the national high school girls indoor record at Harvard last March.

Gilberto Valenzuela Jr., 14, from Gaithersburg and Seneca Valley High School, will compete in the judo events. Valenzuela, a member of the Washington Judo Club, placed first at the Maryland State Junior Olympics.

Robert Beavers III, 18, long jumper from Winston Churchill High School, and McOlzer Brown Jr., 18, discus thrower from Bowie High School, placed second in their events at the regionals earlier this year in Altoona, Pa.

Groveton's Angie Jones will compete in the games after first-place finishes in the high jump and the long jump in the regionals.

Alisa Harvey and Cheryl Hopkins, both from Jefferson High School, earned their way to Memphis with second places at the regionals in the 800-meter run and the triple jump, respectively.

The first Junior Olympics Games were held in Washington in the summer of 1967 with only two sports--track and field and swimming. This year's games will have competition in basketball, boxing, gymnastics, judo, swimming, synchronized swimming, track and field, decathlon/heptathlon, water polo, field hockey, wrestling, table tennis and weight lifting. Participants are AAU club members 18 and younger.