MacKay , who had the slowest qualifying of the seven competitors in the heat , was sixth after the butterfly portion .
MacKay moved up one position on the backstroke leg and gained another spot in the final 50 meters ( freestyle ) .
MacKay , who had the slowest qualifying of the seven competitors in the heat , was sixth after the butterfly portion , but he moved up one position on the backstroke leg and gained another spot in the final 50 meters ( freestyle ) .