Werner Winsemann  Werner Winsemann was a German-born former Canadian football referee. He officiated at the 1974 FIFA World Cup as a referee and linesman. At the 1978 FIFA World Cup he officiated as a linesman (now called assistant referee) only. He is the only Canadian referee selected for a FIFA World Cup. Winsemann also worked the football tournaments of the 1972 Olympic Games and 1976.