5 Tips for the Tag Play at the Plate - Referee.com
The Dying Art of the Manager Meltdown - The New York Times
MLB: Pirates manager, ump calmly put on masks before arguing ejection
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Pirates manager, ex-Rays coach Derek Shelton gets first major-league win
Preventing Umpire Interference - Referee.com
14-year-old umpire in Lakewood youth baseball brawl gets new gear
NFL warns not to approach referees without masks on
Korean Baseball Organization sends message to umpires
Professional Woman Umpires – Society for American Baseball Research
January 26, 1919: The Flu Mask Baseball Game – Society for American Baseball Research
How to handicap MLB umpire betting stats
MLB Umpire Head Injury: Mask vs. Helmet Debate and the Value of Tradition | Bleacher Report | Latest News, Videos and Highlights
The Secret Lives of 8 Baseball Umpires | Mental Floss
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Baseball back in South Korea but no spitting or high 5s
You're Out! No Fans — Or Spitting — As Baseball Returns To South Korea : NPR
Only in 2020: MLB Umpire Pulls Out Mask for Argument With Pirates Manager | News Break
Umpire (baseball) - Wikipedia
Rules Aside, Major League Baseball Cannot Let Joe West Umpire This Season
Baseball Is Back, but How Does an Umpire Social Distance at Home Plate? | Vanity Fair
January 26, 1919: The Flu Mask Baseball Game – Society for American Baseball Research
Augmented Reality Umpiring: The Future Of Balls And Strikes? | Fish On The Farm
