Minor League Baseball to Trial Ball-Strike Challenges

Minor League Baseball will expand trials of a new rule that allows players to challenge balls and strikes using an automated ball-strike system if they think the umpire missed the call.

Triple-A's Ball/Strike Pitch Location Challenge System Update and a Minor League Ejection in OKC

Major League Baseball Utilizing Automated Strike Zone In Triple-A Games

Major League Baseball Utilizing Automated Strike Zone In Triple-A Games

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Automated ball-strike (ABS) system, pitch timer, bigger bases tested at Triple-A

Japan's Standardized Baseballs Are Popular With Pitchers - The New York Times

Ball-and-strike challenges could be coming to MLB in 2023 - Bleed Cubbie Blue

The Automated Strike Zone Is Slightly Different At Triple-A in 2023 — College Baseball, MLB Draft, Prospects - Baseball America

Why Long Term Problems Loom for MLB During Lockout - The New York Times

Triple-A's Ball/Strike Pitch Location Challenge System Update and a Minor League Ejection in OKC

Bulls Begin ABS Challenge Games

ABS system gets rigorous test at Futures Game

Minor league baseball testing field for MLB's pace-of-play initiatives

Triple-A's Ball/Strike Pitch Location Challenge System Update and a Minor League Ejection in OKC

Robo-umps are coming to Major League Baseball, and the game will never be the same