Duncan was placed on the injured list Feb. 28, two days after injuring his left quadriceps against the Dallas Mavericks. He has missed the the last six games.
The two-time MVP participated in pregame workouts on Tuesday, but it was determined he was not ready to play.
Without their best player, the Spurs had a three-game winning
streak snapped with a 94-88 road loss to the Memphis Grizzlies.
Tony Parker scored 24 points and and Malik Rose collected 19 and
14 rebounds for San Antonio, which lost for the third time in
11 games this season without Duncan in the lineup.
Rasho Neseterovic added 13 points and 13 rebounds for the Spurs,
who fell three games behind Minnesota for first place in the
Los Angeles has dropped seven of its last nine games after
opening a three-game road trip with a 90-85 loss to the Houston
Rockets on Tuesday.