EMPLOYEE WAS HITCHING A TRAILER TO A PICKUP TRUCK. IN THE PROCESS THE EMPLOYEE CAUGHT HIS LEFT INDEX FINGER BETWEEN THE TRAILER HITCH AND THE PICKUP BALL CUTTING HIS FINGER NEAR THE END ON THE FINGER. THE CUT WAS CLEANED, 1ST AID ADMINISTERED, BUT WAS RECOMMENDED TO SEE A DOCTOR. EMPLOYEE RECECIVED DOCTOR'S TREATMENT SAME DAY AND RECEIVED STITCHES FOR CUT.