January 15-16 - At the age of 14, golf prodigy Michelle Wie becomes the youngest woman (and only the fourth overall) to play at a PGA Tour event, shooting 72-68 (even par) at the Sony Open in Hawaii at Waialae Country Club in her hometown of Honolulu. She missed the cut by one stroke.
May 9 - Se Ri Pak wins the LPGA Michelob ULTRA Open at Kingsmill, qualifying her for the World Golf Hall of Fame. She will not be eligible for induction, however, until she completes her 10th year on tour in 2007.
June 20 - Retief Goosen captures a second U.S.Open victory, after Phil Mickelson falters over the closing holes at Shinnecock Hills chasing a second successive major.
July 18 - Todd Hamilton wins The Open at Royal Troon, surprising many by beating Ernie Els in a playoff for the title, from a final-day leaderboard that also included recent major champions Mickelson, Goosen, Woods, and Mike Weir.
September 6 - Vijay Singh replaces Tiger Woods at the top of the world rankings, ending Woods' reign of five years and four weeks. Singh, at the age of 41, enjoys his most successful season, winning nine times on the U.S.Tour.
September 17–19 - Team Europe defeats Team USA 18½–9½ to retain the Ryder Cup. See 2004 Ryder Cup for more details.