Ten MLB umpires are 'set to retire at the end of the month' - the

Now Calling Balls and Strikes: Robot Umpires - WSJ

After 27 years as an umpire, Randy Meador preparing for retirement

Some 10 umpires reportedly to opt out of shortened MLB season - The Boston Globe

MLB Notebook: Why baseball is stuck with umpire Angel Hernandez

Ten MLB Umpires Set To Retire Ahead Of The 2023 Season

What does an MLB home plate umpire wear for protection? - Quora

Sources - 10 MLB umps retiring, most since '99 - ESPN

The right time': Kentucky native retires from MLB umpiring after 24 years, Sports

Joe West to stand alone among umpires by setting record for games

Royals manager Yost to retire as club's career wins leader - The San Diego Union-Tribune

Ten MLB Umpires Set To Retire Ahead Of The 2023 Season

MLB umpire Eric Cooper dies at 52; did playoffs 2 weeks ago

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