LAS VEGAS (AP) — Blake Griffin has pulled out of USA Basketball’s minicamp because of a strained right shoulder, possibly hurting the No. 1 pick’s chances of playing next year in the world championships.

Griffin told USA Basketball officials Wednesday that he was unable to play because he was injured during the third of the Los Angeles Clippers’ five summer league games. He will spend the next three to four weeks resting the shoulder.

U.S. coach Mike Krzyzewski said Tuesday he was looking forward to seeing Griffin play this week.

The minicamp is being used to identify candidates for available spots on the U.S. team in the world championships. Griffin could still be invited to compete for a spot next summer with a strong NBA season.