Why are the New York Yankees retiring Paul O'Neill's number 21 on
Yankees to retire Joe Torre's number, honor Tino Martinez and Paul
Paul O'Neill Yankees No. 21 retired
Paul O'Neill Number Retirement Raises Debate - Last Word On Baseball
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water
Paul O'Neill Yankees No. 21 retired
Monument Park (Yankee Stadium) - Wikipedia
Yankees to retire Paul O'Neill's No. 21 on Aug. 21
The Yankees Retire Paul O'Neill's Number 21 - The New York Times
Paul O'Neill discusses number retirement by Yankees