SHOOTING STARS: Patrick Ewing of the New York Knicks edged Akeem Olajuwon of the Houston Rockets at center in the closest balloting for the 1990 all-NBA team, it was announced yesterday in New York.

Ewing, who averaged 28.6 points, 10.9 rebounds and 3.99 blocked shots per game and shot .551 from the field, received 344 points. Olajuwon got 326.

Joining Ewing on the first team were guards Magic Johnson of the Los Angeles Lakers and Michael Jordan of the Chicago Bulls and forwards Charles Barkley of the Philadelphia 76ers and Karl Malone of the Utah Jazz.

Johnson, named the league's most valuable player last month, was the leading vote-getter with 458 of a possible 460 points.

MOVING ON: 76ers General Manager John Nash, citing the stress of running both basketball and business operations and the changing role of NBA general managers, said yesterday that he definitely was leaving Philadelphia and was talking with the Denver Nuggets about becoming their general manager.

Nash, who announced last month his intention to leave but was urged by owner Harold Katz to stay on, said he made his decision final Tuesday night and although he had received no definite offers, he felt "it's time to move on."

The Nuggets' opening, Nash said, is "to administer their basketball operations." Denver recently hired former Charlotte Hornets GM Carl Scheer to run the business side of the franchise.