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Looking Official: The Umpire Uniform - Little League
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Page 2 : Uni eye for the ump guy
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MLB sticky stuff: Pitcher checks, enforcements change in 2022 - Sports Illustrated
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Opening Day in MLB: New No. 21 patches, NL DHs and Guardians, Baseball
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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 to Wear JM, EC Patches in 2019 World Series – SportsLogos.Net News
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Page 2 : Uni eye for the ump guy
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Umpire (baseball) - Wikipedia
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Marlborough's Jim Reynolds calls it a career after 24 years as an MLB umpire - The Boston Globe
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As MLB moves toward using 'robot umpire,' getting strike/ball calls right is the goal