Nick Collison took a very sharp elbow to the top of his head during the Thunder – Spurs game. Either that or someone attacked him with a hatchet. Collison was very, very bloody and it looked like there was a huge gash in his hair.
Update: It appears that Jeff Ayers might have caught him while fighting for a rebound. Collison returned to the bench in the 4th quarter after receiving 4 staples.