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Why do so many MLB players grow beards and/or shave their heads? - Quora
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Don Mattingly bans Marlins players from growing sweet mustaches like he had in the '80s
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An Appreciation for Don Mattingly's Mustache in the 1980s - Men's Journal
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Don Mattingly out as Marlins manager after seven seasons
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The 50 Greatest Mustaches in MLB History, News, Scores, Highlights, Stats, and Rumors
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The 50 Greatest Mustaches in MLB History, News, Scores, Highlights, Stats, and Rumors
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The Cardinals most likely to have Tommy John surgery - A Hunt and Peck - Viva El Birdos
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Miami Marlins' Don Mattingly bans facial hair
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Beard - Wikipedia
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The 50 Greatest Mustaches in MLB History, News, Scores, Highlights, Stats, and Rumors
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The 50 Greatest Mustaches in MLB History, News, Scores, Highlights, Stats, and Rumors