The Masters, US Open, The Open and USPGA Championship.
The Masters, the U. S. Open, The Open and the PGA.
All golf majors are played in 18 hole rounds.
The Grand slam is all 4 men's professional golf majors in the same calendar year, this has never been done.
Gary Player, Gene Sarazen, Jack Nicklaus, Tiger Woods and Ben Hogan are the only 5 to have won all 4 majors.
A WGC event is a World Golf Championship event, these are the most prestigious golf events after the majors.
who won 18 majors in Golf
Jack Nicklaus with 18.