‘Ryu Hyun-jin’s complaint?’ KBO’s rebuttal “Ball with a 0.78cm difference” : ZUM News

The Korea Baseball Organization (KBO) unusually shared Automatic Pitching System (ABS) pitch tracking data.

On the 26th, the KBO provided pitch tracking judgment data from ABS operator Sports2I to the media. In particular, we attached data on the pitching trajectories of Hanwha Eagles’ Moon Dong-ju and Ryu Hyun-jin’s match against KT Wiz on the 23rd and 24th.

The player who expressed strong dissatisfaction with ABS was Hanwha Ryu Hyun-jin. In the KT away game on the 24th, Ryu Hyun-jin allowed a straight walk to lead hitter Cho Yong-ho in the bottom of the third inning when the team was ahead 1 to 0.

At this time, the three pitches that Ryu Hyun-jin threw appeared to be slightly in the strike zone on the graph. However, Ryu Hyun-jin was seen tilting his head when he did not receive a strike call. Afterwards, while facing Ahn Chi-young, Kim Sang-soo, and Cheon Seong-ho, 6 of the 8 pitches thrown by Ryu Hyun-jin were ruled balls. It was a rare scene for Ryu Hyun-jin, who played in the Major League (MLB) until last year and had high-level control as an advantage.

Ryu Hyun-jin only allowed 3 runs in the 3rd inning that day and ended up being the losing pitcher. After the game, he expressed his dissatisfaction, saying that the ABS strike zone changes every time he throws.

KBO looked back on the ‘controversial three pitches’ that came out during Cho Yong-ho’s at-bat. KBO explained, “This ball passed 0.15cm above the bottom of the ABS middle zone, but failed to pass the bottom of the ABS end zone by 0.78cm, so it was judged a ball.”

To be considered a strike, the pitched ball must pass through both the strike zone on the middle and end surfaces of home plate. However, Ryu Hyun-jin’s ball did not pass the bottom of the end zone by a small margin.

In addition, KBO also released data on the Hanwha-KT game that took place at the same stadium the day before this game. This is a refutation of the claim that the ruling was different even though the 4th pitch strike when KT Cheon Seong-ho was at bat in the bottom of the 4th inning of the game on the 23rd and the 3rd ball when KT Cheon Seong-ho was at bat in the bottom of the 1st inning of the game on the 24th came in the same course.

Comparison of the positions of the 4th pitch strike (red circle) when KT Cheon Seong-ho was at bat in the top of the 4th inning of the game on the 23rd and the 3rd ball (blue circle) when KT Cheon Seong-ho was at bat in the top of the 1st inning of the game on the 24th. Provided by KBO

The KBO said, “The 4 pitches at the plate of KT Cheon Seong-ho at the bottom of the 4th inning pitched by Moon Dong-ju on the 23rd (ruled as a strike), and the 3 pitches at the plate of KT Cheon Seong-ho at the bottom of the 1st inning pitched by Ryu Hyun-jin on the 24th (ruled as a ball) are in different pitch locations.” provided. The explanation is that Moon Dong-ju’s 4 pitches were in the strike zone, and Ryu Hyun-jin’s 3 pitches were out of the zone.

ABS, introduced for the first time in the world by the KBO league this year, is a system in which a computer determines a strike or ball when a camera installed in a baseball stadium captures the trajectory of a pitcher’s ball. It is then based on a tracking system that transmits the decision as a voice signal to the referee wearing earphones.

The strike zone is set according to the batter’s height. The height of the strike zone was set to be 27.64% to 56.35% of the batter’s height from the ground, and the width was increased by 2 cm on each side from home plate.

To be considered a strike, the ball must pass through the strike zone at both the middle and end surfaces of home plate. By calculating the value of the ball falling due to gravity, the end of the strike zone was set to be 1.5cm lower than the middle.

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