10th The New York Giants purchase pitcher/outfielder Win Mercer from the disbanded Washington franchise. Mercer will go 13-17 in his one season in New York, hitting .294. Mercer hit .299 last season with 73 runs scored. He will jump back to Washington when the American League starts in 1901.
12th John McGraw threatens that if the NL drops Baltimore, which is controlled by the owners of the Brooklyn Superbas, he will form an AL team. Two weeks later the NL Circuit Committee recommends buying out Baltimore, Washington, Cleveland, and Louisville and going to an 8-team league. McGraw then organizes a Baltimore club in the AL.
19th Marty Bergen, Boston’s regular catcher, murders his wife and two children, then takes his own life. Bergen, 28, had suffered an apparently career-ending broken hip during a game last season.
24th The NL Reduction Committee has a secret meeting in Cleveland, supposedly to discuss dropping Louisville, Baltimore, Washington, and Cleveland from the league roster.
The A.L. Reach company is granted a patent for protective headgear known as the “Reach Pneumatic Head Protector.” It won’t gain acceptance, though a few players, notably Roger Bresnahan, will occasionally wear it.