Their attitude towards robot referees 

In 2024, Korean professional baseball will begin a new experiment.

The KBO recently distributed guidance on changing rules, including ABS, to each club.

According to this, the strike zone applies from 56.35% to 27.64% of the player's height from top to bottom, and extends 2 centimeters on each side to the size of home plate on the left and right, for a total of 47.18 centimeters.

It is considered a strike only if the top and bottom height standards are met at both the middle and end surfaces of home plate.

A tracking system is used for all regular pitches to track the position of the pitch, read whether it is a strike or a ball, and deliver the results to the referee.

Korea is the first time that the Automatic Pitching System (ABS), the so-called 'robot umpire', has been implemented in the top league.

The United States started the experiment first. It debuted in the Arizona Fall League and the independent Atlantic League, and later expanded to the minor leagues. In 2023, the scope was expanded to 30 Triple A stadiums.

In the minor leagues, ABS operated in two ways. One left all pitches to be judged, as the KBO currently does, and the other gave both teams three chances and raised objections like a video referee.

The KBO league is the first to be introduced in the top league. If the KBO has followed the Major League's regulations so far, Korea is one step ahead this time.

As such, this is bound to be unfamiliar territory for everyone.

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