Update 12:56 a.m.: Barnes left the game in the fourth quarter with "headaches" and will not return. He played all 12 minutes of the third quarter.
Update 12:03 p.m.: Barnes received six stitches for a laceration to the head, then returned to the game to start the third quarter.
Barnes went up to contest on a Boris Diaw drive, but Diaw continued under him, taking his legs out and spinning Barnes head and torso first onto the court. Barnes remained on the court motionless for several minutes before getting to his feet and being helped to the locker room. A member of the Warriors' staff held gauze to his head to contain what appeared to be a bleeding wound.
Thankfully, Barnes did get up and walk to the locker room on his own power. We'll update you on his condition when we have more information.