7/5/07 employee reported he had a non-work related shoulder injury and couldn't work. Employee states he noticed pain at home the night of 7/3/07. 7/16/07 employee saw his Dr. 7/18/07 employee reported his injury was work related but does not know how or when it occured. Employee put on light duty 7/19/07. Dr referred employee to surgeon for possible torn rotator cuff.