Gregory John Norman AO (born 10 February 1955) is an Australian entrepreneur and retired professional golfer who spent 331 weeks as world number one in the 1980s and 1990s. He won 89 professional tournaments, including 20 PGA Tour tournaments and two majors: The Open Championship in 1986 and 1993. Norman also earned thirty top-10 finishes and was the runner-up eight times in majors throughout his career. In a reference to his blond hair, size, aggressive golf style and his birthplace's native coastal animal, Norman's nickname is "The Great White Shark" (often shortened to just "The Shark"), which he earned after his play at the 1981 Masters.