SKYWALKER CAN'T: New York Knicks forward Kenny "Skywalker" Walker will be sidelined for a week to 10 days because of an injured left knee he strained Saturday in an exhibition game in Barcelona. Walker, the NBA slam-dunk champion two seasons ago, will miss an exhibition game tonight against the Philadelphia 76ers in Albany, N.Y., and he is likely to be sidelined for a game Sunday at Madison Square Garden against the Dallas Mavericks. The Knicks were in Spain for the McDonald's Open international tournament, which they won on Saturday with a 117-101 victory over Pop 84 Split, the European champion from Yugoslavia.

MOSES A TENDER FOOT: Atlanta Hawks center Moses Malone, 35, is suffering from tendinitis in his right foot and is questionable for tonight's preseason game against the Denver Nuggets. Malone will travel with the team, which plays the Nuggets at the University of Southern Colorado in Pueblo. . . . Meanwhile, teammate Sidney Moncrief is trying a comeback. "I came to realize I missed basketball," said Moncrief, who also said he reluctantly retired from the Milwaukee Bucks after the 1988-89 season. "I retired feeling I still could contribute. There were not a lot of teams I wanted to play for and the team I wanted to play for {Milwaukee} didn't want me."

LAKERS ADD A SEMINOLE: The Los Angeles Lakers added rookie free agent forward Irving Thomas to the preseason roster. The 6-foot-8 Thomas, from Florida State, was a member of the Lakers' summer league squad. He averaged 17.1 points and 8.8 rebounds during the team's 10-game summer schedule. As a senior for the Seminoles, Thomas averaged 16.7 points and 7.6 rebounds per game. . . . Former Yugoslavian star Vlade Divac is penciled in as the Lakers' starting center.