Two wrongs trying to make a right: Makeup calls are common for MLB
Called Balls and Strikes Exploring Baseball Data with R
MLB Umpires Missed 34,294 Ball-Strike Calls in 2018. Bring on Robo
Rise of the machines: Robot umpires moving up to Triple-A baseball
AP sources: MLB replay could vanish, monastery setup viable
Rob Manfred Addresses Automated Strike Zone for 2023 Season
Which strike zone is more accurate? TV broadcaster? MLB.com
A deep dive into players, umpires, and the MLBUA - MLB Daily Dish
Strike out the Strike Zone, Strike out the Strike Zone
An Exploration of MLB Umpires' Strike Zones
Major League Baseball's Plan To Introduce Robot Umpires
Numbers don't lie: Umpires are certainly biased but racist