EE WAS REPLACING ON ORE SHOVEL SHANK. HE WAS SWINGING A SLEDGE HAMMER TO POUND THE RETAINER PIN WHEN HE FELT A PAIN IN HIS RIGHT GROIN AREA. A SUBSEQUENT MED EXAM FOUND SOME INFLAMTION OF THE RIGHT TESTICLE & GROIN AREA BUT NO MAJOR INJURY EE WAS RELEASED BACK TO WORK BUT TOLD NOT TO EXERT HIMSELF & LIMIT ACTIVITY