In Defense of Umpires: Why Complaints About MLB's 'Ump Show

MLB umps: West done, Ortiz is 1st staffer from Puerto Rico – WKRG News 5

In Defense of Umpires: Why Complaints About MLB's 'Ump Show' Problem Miss the Mark, News, Scores, Highlights, Stats, and Rumors

MLB umpires' union clarifies use of electronics at spring training sites - ESPN

MLB rules umpires foul on the rule – The Durango Herald

As MLB moves toward using 'robot umpire,' getting strike/ball calls right is the goal

POV: Bad Umpiring Hurt Baseball in 2021, Especially in the Playoffs. It's Time for Change, BU Today

Baseball replay: Major League Baseball's new system ensures that bad calls will still get made for absolutely no reason.

It Is Time for Major League Baseball Umpires to Stop Calling Balls and Strikes

A New Study Shows Umpire Discrimination Against Non-White Players - Baseball ProspectusBaseball Prospectus