PERSON WAS HELPING TO PULL A SECTION OF RAIL. HE AND 3 OTHER MEN WERE USING RAILTONGS TO PULL THE RAIL. WHILE PULLING HE FELT PAININ HIS RIGHT ARM AT THE SHOULDER. HE CONTINUED TO WORK UNTIL 3/15 WHEN HE WENT TO THE DR. THE DR. HAD HIM OFF WORK UNTIL AN MRI COULD BE DONE. THE MRI RESULTS DID SHOW ARTHRITIS AND BURSITIS. A CORTIZONE SHOT WAS GIVEN ON 3/19 AND RTW ON 3/22.