- 1910 - Major League owners are now forbidden to own more than one baseball franchise.
- 1916 :
- --- Catcher Chief Meyers is waived by the New York Giants to the Brooklyn Robins . After that, Brooklyn owners Ebbets and Haughton disagree on his status. A coin toss, won by Ebbets, decides Meyers will remain with the team.
- ---In a sweet deal, the Chicago Cubs send cash to the sinking Chicago Whales of the Federal League and bring back defectors Three Finger Brown , Clem Clemens , Mickey Doolan , Bill Fischer , Max Flack , Claude Hendrix , Les Mann , Dykes Potter , Joe Tinker , Rollie Zeider and George McConnell .
- 1920 :
- ---At a joint meeting in Chicago , all Bleacher prices are raised to 50 cents, Pavilion to 75 cents, and Grandstand to $1.00. Clubs may set aside bleacher space for kids under 14 at 15 and 25 cents if they wish. In other agreements, the May 15th–August 30th player limits are raised from 21 to 25, and the American League prohibits player transfers after July 1; the National League , after August 20.
- ---"Wanting to make a clean breast of things", Lee Magee admits to National League president John Heydler and Chicago Cubs president William Veeck that he tried to "toss" a game with the Boston Braves when he was with the Cincinnati Reds , but that the Reds won the game in the 13th inning. Heydler will later testify on June 8 that Magee told him he became suspicious that Hal Chase had double-crossed him and so he stopped payment on the check.
- 1925 - At an American League meeting, a plan is adopted to alternate the site of future World Series openers by league rather than deciding it by a coin toss, with Games One, Two, Six, and Seven in one park and Three, Four, Five in the other, unless a ban on Sunday baseball interferes in one city. The clubs finishing fourth in the AL share in the World Series pool. World Series Umpires get a raise to $2,500, while umps in city series will earn $700. The plan was proposed in 1924, but formally adopted at this meeting.
- 1858 - Jim Keenan , catcher (d. 1926 )
- 1884 - Billy Evans , Hall of Fame umpire (d. 1956 )
- 1894 - Herb Pennock , Hall of Fame pitcher (d. 1948 )
- 1894 - Cotton Tierney , infielder (d. 1953 )
- 1903 - Johnny Lucas , outfielder (d. 1970 )
- 1913 - Bill Adair , manager (d. 2002 )
- 1917 - Allie Reynolds , All-Star pitcher (d. 1994 )
- 1926 - Randy Jackson , All-Star infielder
- 1932 - Billy O'Dell , All-Star pitcher
- 1948 - Jim Barr , pitcher
- 1954 - Larry McWilliams , pitcher
- 1963 - Lenny Dykstra , All-Star outfielder
- 1965 - Lenny Webster , catcher
- 1968 - Eddie Zosky , infielder
- 1970 - Alberto Castillo , catcher
- 1970 - Bobby J. Jones , pitcher
- 1976 - Lance Berkman , All-Star infielder/outfielder
- 1980 - César Izturis , All-Star infielder
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