On February 15 1910 — Both major leagues adopt resolutions banning syndicate baseball, which allowed owners to have financial interests in more than one team. The National League votes for a 154-game schedule to open on April 12th, which the American League has already adopted. Other rules: umpires must announce all team changes to spectators; batting orders must be delivered to the umpire at home plate before the game; a batter is out if he crosses the plate from one batter’s box to the other while the pitcher is in position to pitch; a baserunner is out if he passes another runner before the latter has been put out.

Source:
Baseball Reference February 15
SABR Games Project
National Pastime February 15
Hall of Fame
Replay The Game
Retro Sheet

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