- January 22
- Ruth Jessen wins LPGA Naples Professional Golf Tournament. [1]
- January 26
- Major League Rules Committee votes to expand strike zone. [1]
- January 27
- Jevgeni Grishin skates world record 500m in 39.6 seconds. [1]
- Sam Rice, Eppa Rixey, Elmer Flick, and John Clarkson elected to Baseball Hall of Fame. [1]
- January 29
- The first inductees into the Pro Football Hall of Fame are announced. They are Jim Thorpe, Red Grange and George Halas. [1] [5]
- February 3
- Mickey Wright win LPGA Sea Island Women's Golf Invitational. [1]
- February 8
- AFL's Dallas Texans become Kansas City Chiefs. [1]
- February 10
- Mickey Wright wins LPGA Saint Petersburg Women's Golf Open. [1]
- US female Figure Skating championship won by Lorraine Hanlon. [1]
- US male Figure Skating championship won by Thomas Litz. [1]
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- February 15
- First US female world figure skating champion (Tenley Albright). [1]
- February 17
- Toru Terasawa runs world record marathon (2:15:15.8). [1]
- February 20
- End of the Test Cricket careers of Neil Harvey and Alan Davidson. [1]
- Willie Mays (San Francisco Giants) signs a record US$100,000 per year contract. [1]
- February 27
- Mickey Mantle of the New York Yankees sign a baseball contract worth US$100,000. [1] [5]
- March 10
- Pete Rose debuts with hits in his two first at bats in spring training. [1]
- Wilt Chamberlain of NBA San Francisco Warriors scores 70 points versus Syracuse. [1]
- March 14
- San Francisco's Guy Rodgers ties NBA record with 28 assists. [1]
- March 17
- Bob Cousy plays his last NBA game. [1]
- March 22
- Oregon State's Terry Baker becomes first and only Heisman Trophy winner. [1]
- March 23
- 25th NCAA Men's Basketball Championship: Loyola beats Cincinnati 60-58 (overtime). [1]
- March 28
- AFL's New York Titans become the New York Jets. [1]
- April 1
- New York Mets purchase Duke Snider from the Los Angeles Dodgers for US$40,000. [1]
- April 7
- 27th Golf Masters Championship: Jack Nicklaus wins, shooting a 286. [1]
- Public stock offering of 115,000 shares in Milwaukee Braves withdrawn after only 13,000 shares are sold to 1,600 new investors. [1]
- April 8
- Detroit Tigers claim young pitcher Denny McLain from the Chicago White Sox for US$25,000. [1]
- April 11
- Warren Spahn beats New York Mets 6-1 for his 328th win (most by a lefty). [1]
- April 13
- Pete Rose triples for his first major league base hit. [1]
- Pittsburgh Pirates' Bob Friend balks four times in a game. [1]
- April 18
- Stanley Cup: Toronto Maple Leafs beat Detroit Red Wings, 4 games to 1. [1]
- April 19
- 67th Boston Marathon won by Aurele Vandendriessche of Belgium in 2:18:58. [1]
- April 21
- Betsy Rawls wins LPGA Sunshine Women's Golf Open. [1]
- April 24
- 17th NBA Championship: Boston Celtics beat Los Angeles Lakers, 4 games to 2. [1]
- Boston Celtics' Bob Cousy retires. [1]
- April 28
- Marilynn Smith wins LPGA Titleholders Golf Championship. [1]
- May 3
- Leslie Narum is the only Baltimore Orioles' player to homer on his first at bat. [1]
- May 4
- 89th Kentucky Derby: Braulio Baeza aboard Chateaugay wins in 2:01.8. [1]
- Pitcher Bob Shaw sets record of five balks in a game. [1]
- May 5
- Marilynn Smith wins LPGA Peach Blossom Golf Open. [1]
- May 11
- Los Angeles Dodgers' Sandy Koufax second no-hitter beats San Francisco Giants, 8-0. [1]
- May 12
- Mickey Wright wins LPGA Alpine Civitan Golf Open. [1]
- May 15
- Tottenham Hotspur wins third Europe Cup II at Rotterdam, Netherlands. [1]
- May 17
- Houston Colt .45s' Don Notterbart no-hits Philadelphia Phillies, 4-1. [1]
- May 18
- 89th Preakness: Bill Shoemaker aboard Candy Spots wins in 1:56.2. [1]
- May 19
- Mickey Wright wins LPGA Muskogee Civitan Golf Open. [1]
- May 22
- A C Milan wins 8th Europe Cup 1 at London, England. [1]
- Mickey Mantle hits a ball off Yankee Stadium's facade. [1]
- May 23
- NBC purchases 1963 AFL championship game TV rights for US$926,000. [1]
- May 25
- Early Wynn wins his 300th baseball game. [1]
- Great Britain ends its amateur-professional classes in cricket. [1]
- May 26
- Mickey Wright wins LPGA Dallas Civitan Golf Open. [1]
- Wes Stock becomes the only Baltimore Orioles' player to win a double header. [1]
- May 27
- Three New Jersey businessmen purchase the NHL Colorado Rockies, and get approval to move them to the New Jersey Meadowlands (New Jersey Devils). [1]
- June 9
- First Sunday night game in baseball: San Francisco Giants lose to Houston Colts 3-0. [1]
- June 15
- San Francisco Giants' Juan Marichal no-hits Houston Colt 45s, 1-0. [1]
- June 19
- Charter members of Canadian Football Hall of Fame are chosen. [1]
- June 20
- First Mayor's Trophy Game, New York Mets beat New York Yankees 6-2. [1]
- June 23
- Julius Boros wins golf's US Open. [1]
- New York Mets' Jimmy Piersall, hits his 100th home run, he circles bases backwards. [1]
- July 13
- Early Wynn wins his 300th and last game at age 43. [1]
- July 19
- Philadelphia Phillies' Roy Siever hits home run number 300. [1]
- July 24
- Sonny Liston knocks out Floyd Patterson to retain heavyweight championship. [1]
- July 31
- Cleveland Indians tie record of four consecutive home runs (Held, Ramos, Francona, Brown). [1]
- August 13
- Warren Spahn sets left-hander strike out mark at 2,382. [1]
- August 17
- Jim Hickman becomes the first New York Mets player to hit for the cycle. [1]
- Baltimore Orioles' Dick Hall retires his 28th consecutive player in relief. [1]
- August 24
- First 200-metre freestyle swim under two minutes (Don Schollander 1:58). [1]
- John Pennel is first to pole-vault 17 feet. [1]
- September 1
- Saint Louis Cardinals' pitcher Curt Simmons steals home plate. [1]
- September 6
- Major league baseball's 100,000th game. [1]
- September 7
- Pro Football Hall of Fame dedicated in Canton, Ohio, USA. [1]
- September 10
- Philadelphia Phillies beat Houston Colt .45s, 16-0. [1]
- September 13
- New York Yankees clinch their 28th pennant. [1]
- September 18
- Final game at Polo Grounds, 1,752 see Philadelphia Phillies beat New York Mets 5-1. [1]
- September 29
- Saint Louis Cardinals' Stan Musial's final game, gets his 3,630th hit. [1]
- Houston Colt .45s' John Paciorek goes three for three in his only game. [1]
- October 6
- Los Angeles Dodgers sweep New York Yankees in 60th World Series. [1]
- October 18
- International Olympic Committee votes Mexico City to host 1968 Olympics. [1]
- October 20
- Jim Brown sets NFL single-season rushing record, 1,863 yards. [1]
- November 10
- Gordie Howe takes over NHL career goal lead at 545. [1]
- December 1
- New York Jets' first shutout, beat Kansas City Chiefs 17-0. [1]
- December 2
- Major League Rules Committee bans oversized catcher's mitts, effective in 1965. [1]
- December 8
- Mickey Wright/Dave Ragan Junior win LPGA Haig and Haig Scotch Mixed Golf. [1]
- December 18
- Clarke runs world record 10km (28:15.6). [1]
- December 22
- Oakland Raiders' Tom Flores passes for six touchdowns vs Houston Oilers (52-49). [1]
- December 29
- 52nd Davis Cup: USA beats Australia in Adelaide (3-2). [1]
- December 31
- Chicago Bears win NFL championship. [1]
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