Shift began 6/28/2008 @ 7:00 p.m. Employee slipped on grease on haul truck; caught himself on handrail. Employee complained of rib pain but released to work. Employee was taken off work 7/22/2008 due to wrist/shoulder pain. An investigation to determine if new pain was related to 6/29/08 injury. Our insurance carrier determined new pain is associated with original injury.