- 1877 Cincinnati Enquirer first uses term "bullpen" to indicate baseball field foul territory where late-coming spectators were herded like cattle
- 1910 35th Preakness: R. Estep aboard Layminster wins in 1:40.6
Ruth Outduels Johnson
1917 In a testament to his pitching ability, future Baseball Hall of Fame slugger Babe Ruth leads Boston Red Sox to a 1-0 victory against Washington Senators legend Walter Johnson
- 1921 47th Kentucky Derby: Charles Thompson on Behave Yourself wins 2:04.2
- 1922 Belgian soccer team defeats Netherlands: 1-2
- 1922 MLB New York Giants Jesse Barnes throws a no-hitter against the Philadelphia Phillies, in 2-0 win
- 1925 MBA Pittsburgh Pirate shortstop Glenn Wright makes an unassisted triple play
- 1925 Phillies have their 8th game postponed in a row
- 1932 58th Kentucky Derby: Eugene James aboard Burgoo King wins in 2:05.2
1938 64th Kentucky Derby: Eddie Arcaro aboard Lawrin scores first of record 5 Derby wins
Negro Baseball League
1945 Branch Rickey announces formation of the US Negro Baseball League
- 1949 75th Kentucky Derby: Steve Brooks aboard Ponder wins in 2:04.2
- 1951 International Olympic committee allows Russia to participate in 1952 Olympics
- 1956 New York Giants Bill White homers in his 1st Major League at bat
- 1957 MLB Cleveland Indians pitcher Herb Score is hit in the face by a line drive by New York Yankees Gil McDougald at Municipal Stadium; Score misses the rest of the season
Roy Campanella Night
1959 "Roy Campanella Night" Largest baseball crowd at 93,103 at the LA Coliseum see Yankees beat Dodgers 6-2 in exhibition game
- 1960 86th Kentucky Derby: Bill Hartack on Venetian Way wins in 2:02.4
- 1960 Dodgers Larry & Norm Sherry are baseball's 10th brother battery
- 1960 LA Dodger Norm Sherry's 11th HR wins the game for brother Larry
- 1966 92nd Kentucky Derby: Donald Brumfield aboard Kauai King wins in 2:02
- 1966 NY Yankees fire manager Johnny Keane
- 1969 2nd ABA championship: Oakland Oaks beat Indiana Pacers, 4 games to 1
- 1972 26th NBA Championship: LA Lakers beat NY Knicks, 4 games to 1
- 1979 Gary Roenicke hits into Orioles 13th triple play (Oakland)
- 1982 Californian federal jury rules NFL violates antitrust laws in preventing Oakland Raiders move to Los Angeles Coliseum
- 1983 109th Kentucky Derby: Ed Delahoussaye wins aboard Sunny's Halo for consecutive Derby victories (1982 Gato Del Sol)
- 1983 NHL Prince of Wales Conference Final: New York Islanders beat Boston Bruins, 4 games to 2
- 1986 30th European Cup: Steaua Bucuresti beats Barcelona (0-0, 2-0 on penalties) at Seville
- 1986 Phillies outfielder Garry Maddox, retires
- 1988 114th Kentucky Derby: Gary Stevens on Winning Colors wins in 2:02.2
- 1991 Haryana beat Bombay in the Ranji Cricket Trophy final by 2 runs
Cordero Jr. Retires
1992 Champion Puerto Rican jockey Ángel Cordero Jr. retires after winning 7,057 thoroughbred horse races
- 1994 120th Kentucky Derby: Chris McCarron on Go For Gin wins in 2:03.6
- 1994 Denver Nuggets become NBA's 1st #8 seed to beat a #1 seed (Seattle)
- 2003 Arsenal thrash Southampton, 6-1 at Highbury to start Gunners' amazing English Premier League record 49-game unbeaten streak; ends 24 October, 2004 with 2-0 defeat at Manchester United
- 2005 131st Kentucky Derby: Mike Smith aboard 50-1 longshot Giacomo wins ahead of another outsider Closing Argument; exacta payout $9,814.80
Hat-Trick for Thierry Henry
2006 On the final day of the Premier League season, Thierry Henry scores a hat-trick against Wigan Athletic in the last match played at Highbury
- 2011 137th Kentucky Derby: John Velazquez aboard Animal Kingdom wins in 2:02.04
- 2016 142nd Kentucky Derby: 3-1 chance Nyquist ridden by Mario Gutierrez wins in front of second largest attendance of 167,227
- 2018 World Snooker Championship, Crucible Theatre, Sheffield: Welshman Mark Williams beats John Higgins of Scotland, 18-16; as promised, does his press conference in the nude
- 2021 Cincinnati Reds pitcher Wade Miley no-hits Cleveland Indians, 3-0 at Progressive Field, Cleveland
- 2022 148th Kentucky Derby: Venezuelan jockey Sonny Leon rides 80-1 outsider Rich Strike to victory to become second biggest longshot to win in the history of the event
