The Warriors are NBA champions, but will not be NBA Summer League champions.
After being dominated by the Boston Celtics, 93-69, Thursday night, the Warriors are now 1-4 in Las Vegas and drop to the consolation bracket.
Patrick McCaw led all scorers with 20 points. The sophomore guard shot 6 of 13 from the field and also grabbed three steals on defense.
Rookie Bryce Alford was the only other Warrior to finish with double-digit points, dropping 11 in the loss.
Golden State finishes its Summer League slate Friday at 3:00 p.m. against the loser of Thursday's Clippers vs Heat game.