WThe 1973 Belmont Stakes was the 105th running of the Belmont Stakes at Belmont Park in Elmont, New York, held on June 9, 1973. Facing a field of five horses, Secretariat won by 31 lengths, the largest margin of victory in Belmont history, in front of a crowd of 69,138 spectators. His winning time of 2 minutes and 24 seconds still stands as the American record for a mile and a half on dirt. The event was televised and broadcast over the radio.
WThe 1973 Kentucky Derby was the 99th running of the Kentucky Derby at Churchill Downs in Louisville, Kentucky. Secretariat won the Derby in a record time of 1:59 2⁄5, 2 1⁄2 lengths ahead of Sham, while Our Native finished in third position. Of the thirteen horses that entered and started the race, all horses completed the event. The event was viewed in person by a then-record crowd of 134,476, while also being broadcast both on television and over the radio.
WThe 1973 Masters Tournament was the 37th Masters Tournament, held April 5–9 at the Augusta National Golf Club. Due to weather delays, the final round was played on Monday for the first time since 1961.
WThe 1973 NCAA Division I Cross Country Championships were the 35th annual cross country meet to determine the team and individual national champions of NCAA Division I men's collegiate cross country running in the United States. Held on November 19, it was hosted by Washington State University at Hangman Valley Golf Course, near Spokane, Washington.
WThe 1973 NCAA University Division Golf Championship was the 35th annual NCAA-sanctioned golf tournament to determine the individual and team national champions of men's collegiate golf at the University Division level in the United States.
WThe 1973 NCAA Men's Volleyball Tournament was the fourth annual tournament to determine the national champion of NCAA men's college volleyball. The tournament took place at Peterson Gym on the campus of San Diego State University in San Diego, California. Like the previous year, the format of this championship consisted of a preliminary, four-team round robin to determine seeding for a subsequent single-elimination tournament. The round-robin seeding games were played on Friday, May 25th at Peterson Gym on the San Diego State campus. The semi-final and championship matches were held at the San Diego Sports Arena on Saturday, May 26th.
WThe 1973 NCAA Men's Water Polo Championship was the fifth annual NCAA Men's Water Polo Championship to determine the national champion of NCAA men's college water polo. Tournament matches were played at the Belmont Plaza Pool in Long Beach, California during December 1973.
WThe 1973 NCAA Skiing Championships were contested at the Middlebury College Snow Bowl in Hancock, Vermont at the twentieth annual NCAA-sanctioned ski tournament to determine the individual and team national champions of men's collegiate alpine, cross country skiing, and ski jumping in the United States.
WThe 1973 PGA Championship was the 55th PGA Championship, played August 9–12 at Canterbury Golf Club in Beachwood, Ohio, a suburb east of Cleveland. Ohio native Jack Nicklaus won the third of his five PGA Championships, four strokes ahead of runner-up Bruce Crampton.
WThe 1973 Preakness Stakes was the 98th running of the Preakness Stakes at Pimlico Race Course in Baltimore, Maryland held on May 19, 1973. Six horses entered, and Secretariat won by 2 1⁄2 lengths ahead of Sham in front of a record crowd of 61,657 spectators. The race was viewed on television and broadcast over the radio.
WThe 1973 USA Outdoor Track and Field Championships men's competition took place between June 15–17 at Memorial Stadium on the campus of Bakersfield College in Bakersfield, California. This was Bakersfield's third and last time to host the men's division in a sequence every three years since 1967. At this time, Memorial Stadium still had a finely crushed brick surface, the last time the championships was held on a dirt track. They would host the women's division the following year, as they had in 1971. This was also the last time the men's division would compete at imperial distances. The women's division held their championships separately a little over a hundred fifty miles south at Anteater Stadium on the campus of University of California, Irvine in Irvine, California.
WThe 1973 U.S. Open was the 73rd U.S. Open, held June 14–17 at Oakmont Country Club in Oakmont, Pennsylvania, a suburb northeast of Pittsburgh. In one of the finest performances in tournament history, Johnny Miller fired a record, 8-under-par 63 in the final round to win his first major championship, one stroke ahead of runner-up John Schlee.
WThe United States competed at the 1973 World Aquatics Championships in Belgrade, Yugoslavia from August 31 to September 9.