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

Humans are out! Hawk-eye robo ump, a new strike-calling system, will debut this week at Harbor Park. – The Virginian-Pilot

MLB Futures Game had challenged balls, strikes with ABS; Fans loved it

MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today

Jacksonville Jumbo Shrimp use Automatic Ball-Strike System

ABS Challenge System at Sahlen Field Bisons

Future Twins Weigh in on an Electronic Strike Zone - Twins - Twins Daily

Automated ball-strike system challenge system a hit in AFL

MLB's Rob Manfred says automated strike zone is coming to league

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

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

Codify] MLB umpires missed over 21,000 balls & strikes calls during the 2023 regular season. It was their best season ever. : r/baseball

Column: Improving ball-strike calls is a challenge MLB needs to take on, Professional: All Sports