Michael James Hegstrand ( September 12 , 1957 â `` October 19 , 2003 ) was an American professional wrestler who was best known for wrestling with World Wrestling Federation ( WWF ) and World Championship Wrestling ( WCW ) under the ring name , Road Warrior Hawk . Michael James Hegstrand ( September 12 , 1957 â `` October 19 , 2003 ) was an American professional wrestler .