Jack William Nicklaus, nicknamed "the Golden Bear", is a retired American professional golfer and golf course designer. He is widely considered to be either the greatest or one of the greatest golfers of all time. He won 117 professional tournaments in his career. Over a quarter-century, he won a record 18 major championships, three more than second-placed Tiger Woods. Nicklaus focused on the major championships—the Masters Tournament, U.S. Open, Open Championship and PGA Championship—and played a selective schedule of regular PGA Tour events. He competed in 164 major tournaments, more than any other player, and finished with 73 PGA Tour victories, third behind Sam Snead (82) and Woods (82).

The men's major golf championships, commonly known as the major championships, and often referred to simply as the majors, are the most prestigious tournaments in golf. Historically, the national open and amateur championships of Great Britain and the United States were regarded as the majors. With the rise of professional golf in the middle of the twentieth century, the majors came to refer to the most prestigious professional tournaments.