The History of Umpiring
Why does Angel Hernandez still have a job? Error-prone official is statistically, one of the worst umpires in MLB history
1909: Meet 'Mather,' the worst umpire in Syracuse baseball history
Joe West Breaks Record for Games Umpired - The New York Times
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ACC to Make History with All Black Umpire Crew This Weekend
MLB umpire rankings: Pat Hoberg is baseball's most accurate ump
The PUZZLING Origins of Umpire Signals
Controversial umpire Joe West closing in on historic baseball milestone
A New Study Shows Umpire Discrimination Against Non-White Players - Baseball ProspectusBaseball Prospectus
MLB names first Black and Latino born umpire crew chiefs – Pro Player Insiders
My Subculture: Umpiring. A Brief History Lesson, by Eric Milliron
