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

How well do umpires call balls and strikes? - Beyond the Box Score

Umpires Are Less Blind Than They Used To Be

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

Joe West (umpire) - Wikipedia

MLB: Umpire Angel Hernandez takes spring training game too far

When Two Umpires Converge on the Same Base

The ROOTS of Honoring the Game – How to Challenge a Call by an Official - PCA

The road is rough — but these wannabe Major League Baseball umpires are keeping their eyes on the ball

The road is rough — but these wannabe Major League Baseball umpires are keeping their eyes on the ball

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

Why MLB umpires hope the art of the signature punch out won't be lost - The Athletic

The road is rough — but these wannabe Major League Baseball umpires are keeping their eyes on the ball

MLB Power Rankings: The 10 Biggest Blown Calls in MLB History (Video Included), News, Scores, Highlights, Stats, and Rumors

A Baseball Umpire on the Power of Making Decisions

Robot umps take large step forward to MLB as Triple-A adopts them