Employee claims that while lifting and transferring 50 pound items to another person he felt a pop in his left shoulder. Reported on 1/14/11 to supervisor but no doctor visit. 3/4/11 seen by doctor, heal with rest. 7/8/11 follows up, persistent popping. 8/11/11 seen by Ortho without reporting. 8/16/11 discussed proper procedure for doctor visits, first notice of physical therapy.