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The Independent UK
The Independent UK
National
Ronald Blum

Robot umpires are coming to MLB. Here’s how they work

MLB TripleA Donald Trump Air Canada

Robot umpires are coming to the big leagues this year.

The Automated Ball/Strike System will be introduced in the form of a challenge system in which the human umpire makes each call, which can be appealed to the computer. Robot umpires have been tested in the minor leagues since 2019, with recent testing done at Triple-A since 2022, MLB spring training last year and at the 2025 All-Star Game in Atlanta.

Here's what to know about MLB's robot umps.

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