Lou Riecke, 37, of New Orleans, a weight lifter for the past 20 years, set a world record of 325 pounds for the light heavyweight two-hand snatch at the YMCA championships in Los Angeles, bettering by 2¼ pounds the record of Finland's Jakko Kailajarvi.

Gary Penney, 12, of Portland, Me., defeated his brother Larry 21-11, 21-9, 21-12 in the finals of the Portland Boys' Club table tennis tournament. Gary is left-handed, but that was no advantage for him: Larry is his identical twin and a southpaw, too.

Maureen Hart, 23, an Iowa State University graduate student who took up shooting four years ago at the urging of her brother Mike, outscored 17 men to win the small-bore marksman group title in the Nebraska Rifle Championships in Omaha. Mike was second.

Lew Alcindor, 16, a 7-foot-inch junior center on New York City's Power Memorial Academy basketball team who averaged 26 points a game this season, was named to the Scholastic Coach 38-player All-American high school squad for the second year in a row.

Lieut. Tom Gompf, 25, an Air Force pilot and former All-America diver at Ohio State, left the hospital where he was being treated for German measles just long enough to win the National AAU indoor platform diving title at the Air Force Academy, Colo.

George Pavlish, 35, the principal of the Mari-Linn Grade School in Lyons, Ore. and a twice-a-week bowler in nearby Stayton, Ore., rolled a 300 game at the Oregon men's tournament in Eugene. It was the first perfect score in the event's 23-year history.