one who has a handicap of zero in golf is known as
Handicap (golf) A golfer whose handicap is zero is called a scratch golfer. A golfer whose handicap is approximately 18 is called a bogey golfer.[1]
PGA Championship The PGA Championship was established for the purpose of providing a high-profile tournament specifically for professional golfers at a time when they were generally not held in high esteem in a sport that was largely run by wealthy amateurs. This origin is still reflected in the entry system for the Championship. It is the only major that does not explicitly invite leading amateurs to compete (it is possible for amateurs to get into the field, although the only viable ways are by winning one of the other major championships, or winning a PGA Tour event while playing on a sponsor's exemption), and the only one that reserves a large number of places, 20 of 156, for club professionals. These slots are determined by the top finishers in the club pro championship, which is held in June.