Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed
Paul O'Neill's No. 21 Jersey to Be Retired by Yankees on August 21, News, Scores, Highlights, Stats, and Rumors
Paul O'Neill (baseball) - Wikipedia
Paul O'Neill Yankees No. 21 retired
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Yankees to retire Paul O'Neill's No. 21 on Aug. 21
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
New York Yankees to retire Paul O'Neill's No. 21
Paul O'Neill's No. 21 to be retired by Yankees