MLB umpires get defensive about how they interpret controversial
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today
Plate discipline: MLB umps crack down on blocking home
The Jays aren't fans of robot umps or pitch clocks
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Baseball umpires aren't blind. They just have trouble breathing, study of balls and strikes shows
What will the ban on the shift mean in MLB next season? Who will it benefit? - Quora
It's a Really Weird Time to Be an Umpire - The New York Times
MLB umpires becoming harder to ignore, defend
These MLB umpires have the worst strike zones - The Washington Post
TCU Runner Pushed Off Base But Called Out AnywayWhy Replay Overturned Umpire's Safe Call at CWS
Close Call Sports & Umpire Ejection Fantasy League: World Series Interference - Blame the Rule, not the Umpire
10 Commonly Misinterpreted Little League® Rules - Little League
MLB umpires wear wristbands to protest 'abusive' treatment
Crew chief Tom Hallion explains why Mets' Noah Syndergaard was tossed without warning : r/baseball
Umpire (baseball) - Wikiwand
