Major League Baseball and the players' union have banned rolling block slides to break up potential double plays, hoping to prevent a repeat of the takeout by the Los Angeles Dodgers' Chase Utley that broke a leg of New York Mets shortstop Ruben Tejada in last year's playoffs.
Under the rules change announced Thursday, a runner must make a "bona fide slide," defined as making contact with the ground ahead of the base, being in position to reach the base with a hand or foot and to remain on it, and sliding within reach of the base without changing his path to initiate contact with a fielder.
An umpire can call both the runner and batter out for a violation.
In addition, takeout slides and neighborhood plays will be subject to video review. In the past, the neighborhood play wasn't subject to review.
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Baseball and the union also agreed to limit mound visits by managers and pitching coaches to 30 seconds and to cut the countdown clock for between-innings breaks by 20 seconds, to 2:05 for most games and 2:25 for nationally televised matchups.