First-Base Umpires Call Them as They Hear Them - The New York Times

First base umpire Lew Williams has 3 calls overturned in Nationals-Phillies game

Before Balls and Strikes, Umpires Make a Call to Pray - The New York Times

Rangers' Nathaniel Lowe, other MLB players find less time for small talk with pitch clock

Umpire Position With A Runner on First

Umpire Position With A Runner on First

Steal first base? Robot umpires? Gauging reaction to the Atlantic League's experimental rules – The Morning Call

Umpire Position With A Runner on First

The future is now as 'robot umpires' debut in Atlantic League

What is a strike in baseball? Robots, rule book and umpires view it differently

MLB umpire job responsibilities

Baseball one step closer to having its first female umpire - The Ashcroft-Cache Creek Journal

Both Yankees and Astros announcers were fed up with Angel Hernandez

Optimal Positioning at Home Plate

Beyond the grunt: Umpires mic up, and baseball changes a bit

Hawk-Eye Inventor: 'If You Start From Scratch, Is There A Reason For Umpire's Call? Probably Not' : r/Cricket