The umpires have called the strike zone evenly during the World

Why are balls and strikes called like this in-game? There's no 50% of the ball rule in real baseball, so why is that implemented into the game? : r/MLBTheShow

World Series: Nationals must accept controversial calls in Game 5

Prospectus Feature: The Universal Strike Zone - Baseball ProspectusBaseball Prospectus

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

Worst MLB Umpire Calls in Baseball History

The Size of the Strike Zone by Count

Major League Baseball umpire selection process

Phillies' Kyle Schwarber had to 'stick up for some other guys' with outburst at umpire

MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today