What is the proposed ball-strike challenge system in MLB? - AS USA

MLB catchers wary of looming robo umps amid rules changes - Clearwater Times

John Shipley: MLB's experimental “Challenge” system has legs – Twin Cities

Korean baseball league introduces automated ball-strike system for 2024 as MLB mulls future with robot umps

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

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

Ball-Strike Challenges Among Experimental Rule Changes In Minors In 2022 — College Baseball, MLB Draft, Prospects - Baseball America

Instant replay in Major League Baseball - Wikipedia

Pitch-framing Yankees catchers want no part of robo umps

TIL Per official MLB rules, the strikezone is NOT the 2D box we see on broadcast. It's a 3D pentagonal prism, and if the ball touches any part of it, it's a

My eye over yours': Ball-and-strike challenges, possibly coming to an MLB game near you - The Athletic

Robot umps, challenge system, or neither? WooSox players weigh in

Electronic Strike Zones to Be Used by All 30 Triple A Teams, per Report - Sports Illustrated

Minor League Baseball to Trial Ball-Strike Challenges