The computerized strike zone: Is baseball ready?
Obstruction call helps Phils sweep Nats for 14th win in 16
1999 Baseball History - This Great Game
Hoornstra: Baseball's best and worst umpires, by the numbers – Daily News
Robo umps' will usher in new era in baseball, National Sports
Grading MLB umpires: Meet the humans behind the Twitter bots that track balls and strikes - The Athletic
StatCast Supercut: The 10 worst called strikes so far this season : r/ baseball
Why are MLB umpires so bad at calling inside pitches as strikes when they should be balls? - Quora
Baseball Season: Ways To Improve It
Baseball umpires aren't blind. They just have trouble breathing, study of balls and strikes shows