Jack William Nicklaus (; born January 21, 1940), nicknamed "the Golden Bear", is an American retired professional golfer and golf course designer. He is widely considered to be one of the greatest golfers of all time. He won 117 professional tournaments in his career, including a record 18 major championships. He is an inductee of the World Golf Hall of Fame. Nicklaus won the U.S. Amateur in 1959 and 1961 and finished second in the 1960 U.S. Open, two shots behind Arnold Palmer. Nicklaus turned professional in 1961 at age 21. He won his first professional victory at the 1962 U.S. Open, defeating Palmer by three shots in an 18-hole playoff beginning a long-running rivalry between the two. Nicklaus, Palmer, and Gary Player became known as “The Big Three,” a name given to the trio due to growing popularization of golf in the 1960s. In 1966, Nicklaus became the first player to win the Masters Tournament in back-to-back years; he also won the 1963 PGA Championship and the 1966 Open Championship, becoming at age 26 the youngest player at the time to complete the career grand slam. Named the AP Athlete of the Decade for the 1970s, Nicklaus had won 17 major championships by 1980. He overtook Bobby Jones's record of 13 majors, and became the first player to complete double and triple career grand slams. At age 46, Nicklaus won his final major championship at the 1986 Masters Tournament, which was a record sixth Masters title. He joined the Senior PGA Tour (now known as the PGA Tour Champions) when he became eligible in 1990, and by 1996 had won 10 tournaments, including eight senior major championships, despite playing a limited schedule. He continued to play at least some of the four regular majors until making his final appearance at the 2005 Open Championship held at the Old Course at St Andrews. As of 2026, Nicklaus heads Nicklaus Design, one of the world's largest golf course design and construction companies. He runs an event on the PGA Tour, the Memorial Tournament, which is held at the Nicklaus-designed Muirfield Village Golf Club, and is the subject of the Jack Nicklaus Museum on the campus of his alma mater, Ohio State University. Nicklaus's books vary from instructional to autobiographical, with his Golf My Way considered one of the best instructional golf books of all time; the video of the same name is the best-selling golf instructional to date. Nicklaus won the Ryder Cup with the United States five times as a player, he also captained the team in 1983 and 1987. He received the Presidential Medal of Freedom in 2005 and the Congressional Gold Medal in 2015.