Check Swing Challenge System Being Tested in Arizona Fall League
What is the Check Swing Challenge System?
The Check Swing Challenge System (CSCS) is a new technology that allows batters to challenge close check swing calls on called third strikes.
How does the CSCS Work?
The CSCS is a two-step process:
- The batter challenges the call: If a batter believes they did not swing at a pitch that was called a strike, they can challenge the call by requesting a replay review.
- The replay crew reviews the video: A replay crew at MLB headquarters in New York City reviews the video of the swing and determines whether the batter swung at the pitch.
If the batter wins the challenge:
- The call is overturned and the batter is awarded first base.
- The batter’s ball-in-play streak is preserved.
If the batter loses the challenge:
- The original call stands.
- The batter is charged with a called strike three.
Why is the CSCS Being Tested?
The CSCS is being tested to improve the accuracy of check swing calls. Check swings are often difficult for umpires to call correctly, and the CSCS provides a way to review these calls and ensure that the correct call is made.
How is the CSCS Performing in the Arizona Fall League?
The CSCS has been tested in the Arizona Fall League since 2019. In that time, it has overturned 28% of challenged calls. This suggests that the CSCS is accurate and could improve the accuracy of check swing calls in the Major Leagues.
When will the CSCS be Implemented in the Major Leagues?
MLB has not yet announced when the CSCS will be implemented in the Major Leagues. However, it is expected that the system will be implemented in the near future if it continues to perform well in the Arizona Fall League.
Check Swing Challenge system being tested in Arizona Fall League
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