EMPLOYEE REPORTED THAT HIS LEFT HAND WAS INJURED WHEN HE WAS HOLDING A SHAFT WITH BOTH HANDS AND A CO-EMPLOYEE MISSED THE SHAFT TO BE HIT WITH A SLEDGE HAMMER AND STRUCK HIS HAND. EMPLOYEE GIV EN MINOR CARE FOR ABRASION AND PLACED NO RESTRICTED DUTY WITH RECHECK AND MMI RELEASE EXPECTED ON 9/10/02.