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What is baseballā€™s Automated Ball-Strike Challenge System (ABS)?
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An umpire stands in front of the scoreboard at Camelback Ranch, which displays an ABS Challenge System review showing a pitch called a ball during a Dodgers and White Sox game. Jesus Sanchez of the Miami Marlins signals for an ABS review during a 2025 spring training game, holding a bat and wearing a blue jersey with a blurred crowd in the background.
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What is baseballā€™s Automated Ball-Strike Challenge System (ABS)?: References & Edit History

Article Contributors

Primary Contributors

  • Fred Frommer
    Fred Frommer is a sports historian, author, and writer who has written for a host of national publications. 

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Article title updated for style. Nov 11, 2026
New article added. Mar 18, 2026
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