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Yankees retired numbers and the baseball legends who wore them
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Yankees retire Posada's No. 20 in Monument Park
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Why Andy Pettitte deserves number retired, but Jorge Posada doesn't
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Jorge Posada is an all-time Yankee; Where is he now?
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Yankees Retired Numbers - Who Are The 22 Yankees Who Wore Them
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Yanks to retire numbers for Williams, Pettitte, Posada
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Hip! Hip!: Ten Moments That Defined Jorge Posada's Career - WSJ
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Yankees to retire RF Paul O'Neill's No. 21 on Aug. 21 - The Athletic
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Yankees retired numbers: A look at all of the jersey numbers players cannot wear in the Bronx
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Derek Jeter's No. 2 to be retired on May 14, last Yankees' single digit – The Denver Post