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MLB ABS challenge system explained: How automated ball-strike challenges work in baseball

Saw a hitter, catcher, or pitcher tap their helmet after a pitch and wondered what just happened. Here’s a clear guide to MLB’s ABS challenge system, including who can challenge, how many challenges ...

ABS challenge rules explained: How the MLB Automated Ball-Strike Challenge System works

Major League Baseball will use the Automated Ball-Strike Challenge System (ABS) during the entire 2026 season ABS CHALLENGE ...

MLB's new ABS strike-zone challenge system explained with 158 Royals games to go

Wondering exactly how baseball's "ABS challenge" system works? You've come to the right place.

MLB challenge system, explained: What to know about ABS rules and robot umpires in 2026 season

That's because "robot umpires," in a sense, have officially arrived to MLB. The human element remains, but players will now ...