An Umpire Took One Too Many Foul Balls to the Face. He Invented a Solution. - WSJ
Center Field on Fire: An Umpire's Life with Pine tar Bats, Spitballs, and Corked Personalities: 9781572435698: Phillips, Dave, Rains, Rob, Costas, Bob: Books
No more 'generic Dad Nikes' - How MLB umpires -- yes, umpires! -- are stepping up their shoe game - ESPN
Robot umpire: Baseball edges closer to implementing automatic strike zone in major leagues
How well do umpires call balls and strikes? - Beyond the Box Score
New MLB deal brings sponsor patches to player uniforms for the first time
Slate - What They Teach You at Umpire School
Umpires in Dodgers-Giants game wear Pride hats, a first for pro sports - Outsports
Umpire Substance Checks Put Pitchers in Awkward Positions - The New York Times
Major League Baseball umpire loses appeal of discrimination lawsuit
Why become a high school baseball umpire? You've got a game - Los Angeles Times
Why Robot Umps Aren't the Best Solution to MLB's Umpiring ProblemYet, News, Scores, Highlights, Stats, and Rumors
In 1973, new fashion for baseball umpires was strictly a judgment call - The Boston Globe
Shocker: Angel Hernandez Continues To Lose In Court As He Refuses To Accept His Terrible Umpiring Is The Reason He Can't Work The World Series
MLB Fans Threaten to Boycott Over 'Robot Umpires'—'Will Ruin the Game