What Bad Umpiring Looks Like
Why Robot Umps Aren't the Best Solution to MLB's Umpiring ProblemYet, News, Scores, Highlights, Stats, and Rumors
Why baseball offenses are struggling and how MLB can fix it
Dale, we know you're gay.' How a Major League Baseball umpire came out - Outsports
Why do MLB fans, managers have issues with umpire Angel Hernandez?
MLB Umpires Missed 34,294 Ball-Strike Calls in 2018. Bring on Robo-umps?, Bostonia
The Robo-Ump Revolution Will Be Less Than Expected — College Baseball, MLB Draft, Prospects - Baseball America
They Call 'Em Like They See 'Em - Twinkie Town
Umpire Substance Checks Put Pitchers in Awkward Positions - The New York Times
MLB: Umpire Angel Hernandez takes spring training game too far
Is baseball ready for robot umpires? We fielded an informal survey at the MLB All-Star Game in Seattle – GeekWire
Joe West Breaks Record for Games Umpired - The New York Times
Instant replay in Major League Baseball - Wikipedia