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Opening Day in MLB: New No. 21 patches, NL DHs and Guardians
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Rookie MLB ump from hard times: Yankee Stadium, full count, Aaron Judge, 9th inning 'piece of cake'
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Umpires to Wear JM, EC Patches in 2019 World Series – SportsLogos.Net News
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Judge, jury and executioner: The ballad of 'Cowboy' Joe West
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Umpires Wearing EC, CM, RR Patches in 2020 – SportsLogos.Net News
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Umpires Wearing EC, CM, RR Patches in 2020 – SportsLogos.Net News
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MLB umpire, Iowa native Eric Cooper honored before Game 1 of World Series
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Do AL and NL MLB umpires wear a patch on their hats for their league? - Quora
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Umpires Are Less Blind Than They Used To Be
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Don Denkinger, 86, Top Umpire Remembered for Botched Call, Dies - The New York Times
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Do AL and NL MLB umpires wear a patch on their hats for their league? - Quora
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10 Secrets of MLB Umpires
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Roberto Clemente Award winners to wear cap patch
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Cincinnati Reds rookie Elly De La Cruz homers after umpires had him remove knob piece from bat