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Gregory John Norman AO (born 10 February 1955) is an Australian professional golfer and entrepreneur who spent 331 weeks as the world's Number 1 Official World Golf Rankings ranked golfer in the 1980s and 1990s. He has won 91 international tournaments, including 20 PGA Tour tournaments and two majors: The Open Championships in 1986 and 1993. Norman also earned thirty top-10 finishes and was the runner-up 8 times in majors throughout his career.

In 1986, Norman's 11 worldwide victories that year included four wins in Australia and two regular PGA Tour events; the Panasonic Las Vegas Invitational and the Kemper Open (for the second time) but 1986 is remembered for the Norman Slam or the Saturday Slam. Norman held the lead for all four majors through 54 holes. This meant he played in the final group for every major and had perhaps the best chance in history of winning the single season Grand Slam. However, the only major victory Norman earned that year was in the 1986 Open Championship at Turnberry.  At the 1986 Masters, Norman started with the lead until he double-bogeyed the 10th hole. After making four consecutive birdies on holes 14 to 17, Norman was tied with Jack Nicklaus going to the 18th. Norman missed a par putt on the 18th that would have sent the two into a sudden death playoff. At the 1986 U.S. Open at Shinnecock Hills, Norman again led after 54 holes. However, Norman faltered on the final day, finishing with a final round 75 placing him six strokes behind the winner, Raymond Floyd.  Norman finally broke through at the 1986 Open Championship for his first major title. Norman shot an efficient second round of 63 on Friday at Turnberry. Only 15 players broke par in the second round. Tom Watson described Norman's feat as "the greatest round ever played in a tournament in which I was a competitor." Norman survived the weekend's brutal conditions at Turnberry, with a final round of 69 to win The Open by five shots. After being presented with the Claret Jug trophy, Norman said: "Outside of Australia, Britain was the first place that accepted me as a professional golfer. To win my first Open in front of the British public is the greatest feeling ever." Norman was again in contention at the 1986 PGA Championship. He was in the lead on the final day, but shot a final round 76 to finish 2 strokes behind the eventual winner, Bob Tway.  Norman's four wins in Australia in 1986 helped him to finish top of the Australian Order of Merit for the fifth time. He also topped the U.S. PGA Tour money list for the first time that year. In September 1986, Norman won the Panasonic European Open at Sunningdale Golf Club and the following month he had another victory in England, winning his third World Match Play Championship at Wentworth. Norman ended 1986 with eleven worldwide victories and was officially ranked number 1 in the brand new Official World Golf Rankings.

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Greg Norman