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Bob Davidson (umpire) - Wikipedia
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Chuck Meriwether - Wikipedia
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Umpire (baseball) - Wikipedia
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Jerry Layne - Wikipedia
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John Tumpane - Wikipedia
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Dan Bellino - Wikipedia
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Instant replay in Major League Baseball - Wikipedia
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Ump Attire - Alan Dwayne Porter Jr. (born December 18, 1977) from Philadelphia, PA. He umpired his first Major League game on April 5, 2010. He wears uniform number 64. cred Wikipedia
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Lance Barksdale - Wikipedia
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Alfonso Márquez - Wikipedia
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Paul Nauert - Wikiwand