No one. No player has ever won the Grand Slam. But, In 2000/2001 Tiger Woods won the Tiger Slam which was the 2000 US Open, 2000 Open, 2000 PGA Championship and 2001 Masters, the only player to hold all four major titles at once, it was known as the Tiger Slam.
USA
who won 18 majors in Golf
Five Players have won all four majors. - Jack Nicklaus, Tiger Woods, Ben Hogan, Gary Player, and Gene Sarazen.
The four majors- The Masters, The US Open, The British Open, and The USPGA Championship make up the grandslam, if all won in the same year.
Sam Snead with 82.
Jack Nicklaus has won 18 majors, the most any player has ever won.
He's won lots of Majors and even more other tournaments.
No man has won a season Grand Slam. Since the Grand Slam of today is different from the one Bobby Jones won, you could argue that he never did it either - but considering his accomplishment, that would just be silly. Tiger Woods have won all four majors within a period of twelve months, but with a new years eve stuck in the middle. Two women have won all the LPGA majors of a season: Babe Zaharias who won the three majors held in 1950 and Sandra Haynie who won the only two majors held in 1974. Bobby Jones' never won a "grand slam" in the modern sense, not just because it didn't exist in his day but for the simple fact that Jones never played professionally. In his day, golf was still a gentleman's game in the true sense--professional golfers were considered low-class. Jones would have never considered playing for money.
Steve Williams (Tiger Woods's former caddy). With Tiger, he won 13 majors tournaments.
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Yes, he has won 14 majors and many many tour events. He is considered the best modern day golfer and possibly the greatest of all time.
Well, it is one of the majors, so it is one of the four most prestigious mens' competitions that can be won. It's place in the top 4 would depend on personal and player preference.