- April 15
- Houston Astros beat New York Mets, 1-0, in 24 innings. [1]
- April 17
- Oakland Athletics' first game in Oakland-Alameda Stadium, lose 4-1 to Baltimore Orioles. [1]
- April 18
- First ABA basketball championship begins. [1]
- April 19
- 72nd Boston Marathon won by Amby Burfoot of Connecticut in 2:22:17 (first American to win since 1957). [1]
- National League owners approve expansion for two new teams. [1]
- April 21
- Carol Mann wins LPGA Lady Carling Golf Open. [1]
- April 24
- ABC Masters Bowling Tournament won by Pete Tountas. [1]
- April 27
- Baltimore Orioles' player Tom Phoebus no-hits Boston, 6-0. [1]
- Jimmy Ellis beats Jerry Quarry for heavyweight boxing title. [1]
- April 28
- Carol Mann wins LPGA Raleigh Ladies' Golf Invitational. [1]
- April 30
- Three Baltimore Orioles pitchers walk 14 New York Yankees in a 9-inning game. [1]
- May 1
- Philadelphia Phillies' J Boozer is ejected for throwing spitballs during his warmup. [1]
- May 2
- 22nd NBA Championship: Boston Celtics beat Los Angeles Lakers, 4 games to 2. [1]
- May 4
- First ABA championship: Pittsburgh Pipers beat New Orleans Buccaneers, 4 games to 3. [1]
- 94th Kentucky Derby: Ismael Valenzuela aboard Forward Pass wins in 2:02.5. [1]
- Dancer's Image disqualified due to drugs after winning 94th Kentucky Derby. [1]
- May 5
- Carol Mann wins LPGA Shreveport Kiwanis Club Golf Invitational. [1]
- May 6
- San Francisco Giants' reliever Lindy McDaniel sets National League record of 225th consecutive errorless game (108 chances consecutively since June 16, 1964). [1]
- May 8
- Jim (Catfish) Hunter of Oakland Athletics pitches perfect game vs Minnesota Twins (4-0). [1]
- May 11
- NHL Stanley Cup: Montreal Canadiens sweep Saint Louis Blues in four games. [1]
- May 12
- Mickey Wright wins LPGA Tall City Golf Open. [1]
- May 15
- First American League game played in Milwaukee, is a 4-2 California Angels' win against Chicago Cubs. [1]
- May 17
- Frank Howard belts record eighth homerun in 5th straight game. [1]
- May 18
- 94th Preakness: Ismael Valenzuela aboard Forward Pass wins in 1:56.8. [1]
- Al Kaline hits his 307th homerun, surpassing Hank Greenberg as a Detroit Tiger. [1]
- Frank Howard ties American League record with homerun in his sixth consecutive game; his ten homeruns are the most in six games. [1]
- May 19
- Frank Howard fails to homer, after hitting ten in six consecutive games. [1]
- May 21
- Chicago Cubs' Billy Williams sets outfielder record of 695 straight games. [1]
- May 22
- Pittsburgh Pirates' player Willie Stargell hits three homeruns, a double and a single. [1]
- May 23
- AC Milan wins 8th Europe Cup II in Rotterdam. [1]
- May 25
- BPAA All-Star Bowling Tournament won by Jim Stefanich. [1]
- BPAA US Women's Bowling Open won by Dotty Fothergill. [1]
- May 26
- Kathy Whitworth wins LPGA Dallas Civitan Golf Open. [1]
- May 27
- 6th Mayor's Trophy Game, New York Mets beat New York Yankees 4-3. [1]
- National League awards Montréal a major league franchise. [1]
- May 28
- American League announces it is splitting into two divisions. [1]
- National League grants San Diego a baseball franchise (San Diego Padres). [1]
- May 29
- Manchester United becomes the first English team to win European Championship soccer tournament beating Benfica of Portugal 4-1 at Wembley after an added 30 minutes. [1]
- June 3
- New York Yankees turn 21st triple-play in their history, but lose 4-3 to Minnesota Twins. [1]
- June 4
- Don Drysdale pitches his 6th straight shutout, en route to 58 innings. [1]
- June 8
- Don Drysdale pitches a record 58th consecutive scoreless inning. [1]
- June 16
- Lee Trevino is first to play all four rounds of golf's US open under par. [1]
- June 20
- Jim Hines becomes first person to run 100 metres in under 10 seconds. [1]
- June 24
- Canadian Sandra Post becomes first non-US and first rookie LPGA winner. [1]
- Jim Northrup hits two grand-slammers to help Detroit Tigers beat Cleveland Indians 14-3. [1]
- Joe Frazier TKOs Manda Ramos for world heavyweight boxing title. [1]
- June 25
- Bobby Bonds hits a grand slam in his first major league game (San Francisco Giants). [1]
- July 3
- Cleveland Indians' Luis Tiant strikes out 19 Minnesota Twins players. [1]
- July 9
- National League beats American League 1-0 in first indoor All Star Game (Houston Astrodome). [1]
- July 14
- Atlanta Braves' Hank Aaron hits his 500th home run off San Francisco Giants' Mike McCormick. [1]
- Houston Astros' Don Wilson strikes-out 18, beats Cincinnati Reds 6-1. [1]
- July 15
- New Jersey Americans move to Comack and become New York Nets (ABA). [1]
- July 29
- Cincinnati Reds' player George Culver no-hits Philadelphia Phillies, 6-1. [1]
- July 30
- Washington Senators' Ron Hansen makes first unassisted triple-play in 41 years. [1]
- August 23
- New York Yankees and Detroit Tigers play 3-3 tie in 19 innings due to 1 AM curfew. [1]
- August 25
- New York Yankees' outfield Rocky Colavito pitches 2 2/3 innings and beats the Detroit Tigers 6-5; he played right field in the second game and hit a home run. [1]
- September 3
- Chicago White Sox set American League record of 39 losses by one run. [1]
- September 9
- First US Open tennis tournament, held as an "open" (Arthur Ashe wins). [1]
- Minnesota Vikings' Tommy Krammer passes for six touchdowns vs Green Bay Packers (42-7). [1]
- September 14
- Detroit Tigers' Denny McLain's 30th victory of the season. [1]
- September 17
- Gaylord Perry (San Francisco Giants) no-hits Saint Louis Cardinals, 1-0. [1]
- September 18
- Ray Washburn (Saint Louis Cardinals) no-hits San Francisco Giants 2-0. [1]
- September 20
- Mickey Mantle hits final career homer number 536. [1]
- September 22
- Minnesota Twins' Cesar Tovar pitches a hitless inning and plays all nine positions. [1]
- September 24
- New York Mets manager Gil Hodges suffers a heart attack. [1]
- September 26
- Saint Louis Cardinals' Bob Gibson's 13th shutout, ends with 1.12 ERA. [1]
- September 28
- Atlanta Chiefs beat San Diego Toros 3-0 for NASL championship. [1]
- Chuck Hixson (Southern Methodist) completes 37 of record 69 passes. [1]
- September 29
- Chuck Latourette, sets NFL record 47.7 yard punt return average (three punts). [1]
- October 2
- Bob Gibson sets a World Series record of 17 strikeouts (World Series #65). [1]
- October 10
- Detroit Tigers beat Saint Louis Cardinals, 4 games to 3 in 65th World Series. [1]
- October 11
- Billy Martin is named manager of the Minnesota Twins. [1]
- October 12
- (to October 27) The Games of the XIX Olympiad are held in Mexico City, Mexico. [1]
- Norma Enriqueta Basilio Satelo lights Olympic flame. [1]
- October 14
- J.R. Hines of US runs 100m in world record 9.95 seconds. [1]
- October 16
- During Olympics, Americans Tommie Smith and John Carlos give black power salute. [1]
- Jim Dorey sets Toronto Maple Leafs penalty records (48 minutess on nine penalties in a game, and 44 minutes on seven penalties in a period). [1]
- Milwaukee Bucks play their first game losing 89-84 to Chicago Bulls. [1]
- October 18
- Bob Beamon of USA sets the long jump record (29 feet 2.5 inches) in Mexico City. [1]
- Lee Evans sets world record of 43.8 seconds in 400 metre dash. [1]
- US Olympic Committee suspends Tommie Smith and John Carlos for giving "black power" salute as a protest during victory ceremony. [1]
- October 23
- Kip Keino (Kenya) wins gold medal for 1,500m (3 minutes 34.9 seconds). [1]
- October 25
- Longest Olympic field hockey game, Holland beats Spain 1-0 in 2 hours 25 minutes (6 overtime periods). [1]
- October 31
- Milwaukee Bucks win their first game beating Detroit Pistons 138-118 (6th game). [1]
- November 1
- US pro soccer 14 teams merge into one all star team. [1]
- November 3
- New York Jets' Jim Turner kicks six field goals to beat Buffalo Bills 25-21. [1]
- November 5
- First American League pitcher to win Most Valuable Player, Denny McLain. [1]
- November 11
- Ron Hill sets record 10-mile run (46:44) at Leicester, England. [1]
- November 17
- Heidi bowl-NBC misses Oakland Raiders' rally to beat New York Jets, 43-32. [1]
- November 23
- Milwaukee Bucks make their first NBA trade, giving Bob Love and Bob Weiss to Chicago Bulls for Flynn Robinson. [1]
- December 1
- Peggy Wilson wins LPGA Hollywood Lakes Golf Open. [1]
- December 3
- Major League Baseball pitcher's mound drops from 15 inches to 10 inches and strike zone reduced from knees-to-shoulders to top of knees to armpits, to help hitters. [1]
- December 6
- Baseball dismisses Commissioner William Eckert after three years. [1]
- PBA National Championship won by Wayne Zahn. [1]
- December 10
- Joe Frazier beats Oscar Bonavena in 15 rounds for heavyweight boxing title. [1]
- December 11
- US Soccer Football Association refuses to let NASL disband. [1]
- December 26
- Boston Bruins' Ted Green sets NHL penalty record of three minors, two majors and two game misconducts in a game against the New York Rangers in New York's Madison Square Garden. [1]
- December 28
- 57th Davis Cup: USA beats Australia in Adelaide (4-1). [1]
- December 29
- Baltimore Colts beat Cleveland Browns 34-0 in NFL championship game. [1]
- New York Jets beat Oakland Raiders 27-23 in AFL championship game. [1]
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