New York Yankees: 5 numbers that need to be un-retired
The Yankees Retire Paul O'Neill's Number 21 - The New York Times
Judge HR, Cole Ks lead Yanks over Giants 5-0 on opening day
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New York Yankees history: Paul O'Neill's number 21 must be retired
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New York Yankees: 5 numbers that need to be un-retired
Yankees Retired Numbers
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