Earning Their Stripes as Umpires and Referees - The New York Times
Umpires
Don't Ignore The Signs! How To Become An MLB Umpire.
NJ Little League has a novel response to unruly sports parents. But combative moms & dads persist.
What is a strike in baseball? Robots, rule book and umpires view it differently
How well do umpires call balls and strikes? - Beyond the Box Score
Umpire blazes trail – Orange County Register
As They See 'Em: A Fan's Travels in the Land of Umpires: Weber, Bruce: 9780743294133: : Books
Is baseball ready for robot umpires? We fielded an informal survey at the MLB All-Star Game in Seattle – GeekWire
The video of Terry Collins arguing with an umpire is perfect, but
Umpire numbers dwindling amidst officiating shortage, Local News