DURING THE COURSE OF THE EMPLOYEE'S SHIFT, HE WAS ATTEMPTING TO MOVE A GATE TO CHANGE THE FLOW OF MATERIAL. THE FLOP GATE THAT HE WAS ATTEMPTING TO MOVE WAS STUCK AND HE USED HIS SHOULDER TO P USH ON IT. HE REPORTED THAT HE STRAINED HIS SHOULDER DOING THIS. AT THAT TIME HE FELT HE DIDN'T NEED TREATMENT. 8 WKS LATER HE AGGRIVATED HIS SHOULDER, COMPLAINED OF PAIN, WAS TAKEN TO THE DR