Why does MLB need umpires for home plate when a computer could
Will MLB have 'robo umps' — and when?
StatCast Supercut: The 10 worst called strikes so far this season
Why are MLB umpires so bad at calling inside pitches as strikes
Application, Explanation of Hit-By-Pitch Rule - Little League
Scoring in Baseball Is Down. Blame the Umpires - WSJ
MLB tests automatic Ball-Strike system
Major League Baseball is nearing the era of the robot umpire
These MLB umpires have the worst strike zones - The Washington Post
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps