Major-League Umpiring during the Pandemic of 2020 - Baseball ProspectusBaseball Prospectus
When the Fans Didn't Go Wild: The 2020 MLB Season as a Natural Experiment on Home Team Performance. - Document - Gale Academic OneFile
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Prospect Development Camp, Major League Baseball Umpire Camps
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Major League Baseball needs a settlement to keep fans' interest
2020 Major League Baseball Umpire Roster
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How MLB Umpires Learned to Explain Replays to Crowds - The New York Times