- April 25
- Sandra Haynie wins LPGA Burdine's Golf Invitational. [1]
- April 27
- Curt Flood resigns from Washington Senators after 13 games and departs for Denmark. [1]
- April 30
- 25th NBA Championship: Milwaukee Bucks beat Baltimore Bullets in four games. [1]
- May 1
- 97th Kentucky Derby: Gustavo Avila on Canonero II wins in 2:03.2. [1]
- May 2
- Sandra Haynie wins LPGA Dallas Civitan Golf Open. [1]
- May 8
- Joe Frazier beats Muhammad Ali at Madison Square Garden, New York. [1]
- May 9
- Elizabeth Bonner runs female world record marathon (3:01:42). [1]
- Largest walk-in crowd (31,626) in Baltimore Orioles' history. [1]
- Sandra Haynie wins LPGA San Antonio Alamo Golf Open. [1]
- May 11
- Cleveland Indians' Steve Dunning becomes last American League pitcher to hit grand slam. [1]
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- May 15
- 97th Preakness: Gustavo Avila aboard Canonero II wins in 1:54. [1]
- May 17
- Three Cleveland Indians' players collide trying to catch a short pop fly over second base, allowing Tom McCraw one of the shortest home runs in baseball history. [56]
- May 18
- 4th ABA Championship: Utah Stars beat Kentucky Colonels, 4 games to 3. [1]
- Stanley Cup: Montreal Canadiens beat Chicago Blackhawks, 4 games to 3. [1]
- May 21
- Chelsea wins 11th Europe Cup II in Athens, Greece. [1]
- May 23
- Kathy Whitworth wins LPGA Suzuki Golf Internationalionale. [1]
- May 27
- 23rd Walker Cup: Great Britain/Ireland 13-United States 11. [1]
- UCLA wins NCAA basketball championship. [1]
- May 30
- Willie Mays hits his 638th homerun, sets National League record of 1,950 runs scored. [1]
- June 3
- Chicago Cubs' Ken Holtzman second no-hitter beats Cincinnati Reds, 1-0. [1]
- June 4
- Oakland Athletics beat Washington Senators, 5-3, in 21 innings. [1]
- June 28
- Philadelphia Phillies' Rick Wise hits two home runs and no-hits Cincinnati Reds. [1]
- July 9
- In the longest shutout in American League history, the Oakland Athletics' beat the California Angels, 1-0 in a 20-inning game. [56]
- July 11
- Philadelphia Phillies' Deron Johnson's three home runs caps his four in a row. [1]
- July 13
- American League beats National League 6-4 in 42nd All Star Game (Tiger Stadium, Detroit). [1]
- July 28
- Sixteen-time gold glover Brook Robinson commits three errors in 6th inning. [1]
- August 11
- Harmon Killebrew hits home runs #500 and 501. [1]
- August 14
- Saint Louis Cardinals' Bob Gibson no-hits Pittsburgh Pirates, 11-0. [1]
- August 26
- New York Giants football team announces its leaving the Bronx for New Jersey in 1975. [1]
- Baltimore Orioles' Don Buford strikes out five times in a game. [1]
- September 2
- Cesar Cedeno hits an inside-the-park grand slammer. [1]
- September 5
- New York Mets' Don Hahn hits first inside the park homer in game against Philadelphia Phillies. [1]
- September 9
- NHL great Gordie Howe retires. [1]
- September 13
- Frank Robinson hits his 500th home run. [1]
- World Hockey Association is formed. [1]
- September 14
- Cleveland Indians and Washington Senators play 20 innings. [1]
- September 21
- American League approves Washington Senators' move to Arlington (Texas Rangers). [1]
- September 24
- Houston Astros beat San Diego Padres, 2-1, in 21 innings. [1]
- September 30
- Last Washington Senators' home game, New York Yankees win career 5th forfeit; New York Yankees trailing 4-2 in the 9th with two outs, fans rush the field. [1]
- October 3
- Billie Jean King becomes first female athlete to win $100,000. [1]
- October 10
- First game played at Philadelphia's Veteran Stadium, Philadelphia Phillies win 4-1. [1]
- October 13
- First baseball World Series night game (Pittsburgh Pirates 4 - Baltimore Orioles 3) (World Series #68). [1]
- October 17
- Pittsburgh Pirates beat Baltimore Orioles, 4 games to 3 in 68th World Series. [1]
- October 24
- Chuck Hughes, Detroit Lions' player, collapses during game and later dies. [1]
- Texas Stadium opens - Dallas Cowboys beat New England Patriots 44-21. [1]
- November 21
- New York Rangers score a NHL record eight goals in one period. [1]
- November 29
- First pro golf championship at Walt Disney World, Florida. [1]
- December 1
- Chicago Cubs release Ernie Banks and sign him as a coach. [1]
- December 25
- Longest NFL game (3 hours 21 minutes) as Miami Dolphins beat Kansas City Chiefs 27-24. [1] [1302.232]
- December 30
- Long Island NHL franchise purchased (New York Islanders). [1]
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