Nuggets guard Nate Robinson has had surgery to repair a torn anterior cruciate ligament in his left knee and will miss the rest of the season. Robinson was injured in a spill underneath the Nuggets' basket during the first quarter of Wednesday night's loss to the Charlotte Bobcats. The loss of Robinson left Denver without its top two point guards. Robinson became a key performer off the bench after signing with Denver as a free agent last summer. Team physician Dr. Steve Traina performed the surgery Friday. He averaged 10.4 points and 2.5 assists in 44 games this season.