What is the USGA: The United States Golf Association has served as the sport’s national governing body since 1894. More than 9,000 private and public courses comprise the USGA, which conducts 13 national championships, the majority amateur events other than the PGA Tour U.S. Open; Champions Tour U.S. Senior Open and the women’s U.S. Open.
U.S. Senior Open history
Defending champion: Kenny Perry fired a final round 7-under par 63 to match the lowest round of the week to come from one stroke back to finish with a 13-under 267, five shots better than runner-up Fred Funk at Omaha Country Club in 2013.
Multiple championships: Miller Barber (1982, 1984 and 1985) is the only three-time U.S. Senior Open winner. Four players have won twice — Gary Player (1987, 1988), Jack Nicklaus (1991, 1993), Hale Irwin (1998, 2000) and Allen Doyle (2005, 2006).
Oldest winner: Doyle turned 58 a few weeks before winning in 2006.
Youngest winner: Dale Douglas won in 1986 around four months after his 50th birthday.
2014 tournament facts
The field: A field of 156 golfers will be trimmed to the lowest 60 scores, plus ties, after the first two rounds. Roughly 55 of those 156 will have earned their spots in one-day qualifying tournaments at 34 sites around the country.
The purse: The 2013 prize pool was $2.68 million with the winner earning $500,000.
Playoff tiebreakers: If there is a tie after 72 holes, all players tied will play a three-hole aggregate playoff on Sunday.
About the course
Know for smaller greens with undulations, a course built by Pete Dye in the late 1970s. Oak Tree National, formerly known as Oak Tree Golf Club, is regarded as one of the most demanding courses in the country. It wouldn’t be shocking if just a handful of senior players shoot under par over four days on the 7,219-yard, par-71 layout.
Previous major tournaments
1984 U.S. amateur: An All-American at Oklahoma State, future Oak Tree member Scott Verplank won the U.S. amateur. Nine additional players who might play in this year’s tournament (Billy Andrade, Jeff Brehaut, Mike Goodes, Davis Love III, Jeff Maggert, Michael McCoy, Rocco Mediate, Kirk Triplett and Dusty Waldorf) played in the 1984 amateur.
1988 PGA: By firing a 6-under-par 65 on Sunday to finish 12-under, Jeff Sluman won the 1988 PGA Championship by three shots over Paul Azinger.
2006 Senior PGA: Bill Haas won in a playoff to capture the Senior PGA Championship, finishing 5-under for the tournament.