New York Yankees history: Paul O'Neill's number 21 must be retired
Paul O'Neill, Baseball Wiki
New York Yankees to retire Paul O'Neill's No. 21
New York Yankees to retire All-Star Paul O'Neill's No. 21 jersey
New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman
Should the Yankees retire #21 for Paul O'Neill?
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Paul O'Neill's No. 21 Jersey to Be Retired by Yankees on August 21
New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21