On October 1, 2014, Major League Baseball announces that it will test some new rules to speed up the flow of the game during this coming Arizona Fall League season. Hitters will no longer be allowed to step out of the batter’s box during an at-bat; pitchers will need to begin their pitching motion within 20 seconds of receiving the ball; a batter will take his base automatically when an intentional walk is called for, without the need for the pitcher to throw four pitches outside the strike zone; teams will be limited to three mound conferences, now called time-outs, per game; and there will be a set maximum time before the first pitch is delivered following a change of innings or a pitching change. If these changes prove successful, they may well be introduced at all levels of organized baseball.
December 12, 1930
major leagues adopt a new rule that prohibits baserunners from interfering with batted balls in the field of play
April 25, 1957
April 26, 1969