EMPLOYEE CLAIMS THAT WHEN HE WOKE UP ON THE MORNING OF 4-5-00, HIS LEFT SHOULDER WAS IN PAIN. HE STATED THAT THERE WAS NO INCIDENT AT WORK ON THE PREVIOUS DAY THAT COULD HAVE CAUSED HIM INJURY . HIS DOCTOR SAID IT WAS BURSITIS AND LATER DETERMINED IT WAS A SHOULDER SPRAIN.