Steve Kerr, who coached the Golden State Warriors to the NBA title last season, said Sunday a spinal fluid leak after back surgery led to his absence from the team. Kerr, speaking at the team's practice facility in northern California, said that he suffered the leak of spinal fluid during back surgery on July 28, and despite a second procedure to address the problem was still experiencing symptoms. "It's very rare, it does happen occasionally, but it happens when there's an accidental nick of the dura that surrounds the spinal cord," said Kerr, who announced on October 1 he would be away from the team indefinitely.