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New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN
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Paul O'Neill's No. 21 Jersey to Be Retired by Yankees on August 21, News, Scores, Highlights, Stats, and Rumors
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As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
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Yankees to retire Paul O'Neill's No. 21: See the complete list of retired numbers
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Paul O'Neill Yankees No. 21 retired
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NY Yankees retire Paul O'Neill's No. 21
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Number 21 Continues to Remain Sacred to the New York Yankees, News, Scores, Highlights, Stats, and Rumors
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NY Yankees retire Paul O'Neill's No. 21
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Opposing fans need to shut up about Yankees retiring Paul O'Neill's number
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New York Yankees to retire Paul O'Neill's number this summer