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The son of All Black Fergie McCormick, McCormick (nicknamed "Angus") was educated at Christchurch Boys' High School and came to Japan to play for Toshiba Fuchu in 1992. He was a powerful centre who had a large impact and played 25 times for the Japan national rugby union team, which he captained during the 1999 Rugby World Cup. A hugely popular player, he began coaching at Toshiba and then became a player (2002) and technical adviser (2004) at Kamaishi Seawaves.