EMPLOYEE WAS INSTALLING A ROLLER ON A CONVEYOR & FELT A PULL/TIGHTNESS IN THE RIGHT CENTER OF HIS BACK AFTER PUSHING ON A PRY BAR FOR LEVERAGE. EE REPORTED FOR WORK THE NEXT DAY AS NORMAL & AGAIN ON 11/9/05, WHEN HE CLAIMS TO HAVE RE-AGGRAVATED HIS BACK WHILE SHOVELING MATERIAL FROM A CONVEYOR BELT. EE WAS SENT TO SEE A DR. ON 11/09/05.