Yankees to retire Paul O'Neill's No. 21: See the complete list of

This Day in Yankees History: Paul O'Neill's three homers spark playoff run- August 31, 1995 - Pinstripe Alley

As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times

As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times

New York Yankees history: Paul O'Neill's number 21 must be retired

Defector] The Yankees Are Retiring Paul O'Neill's Number In Monument Park, Which Is Different From Giving Him A Plaque In Monument Park, Which They Already Did, And Also Different From Giving Him

The Yankees Retire Paul O'Neill's Number 21 - The New York Times

As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times

Yankees to retire Paul O'Neill's No. 21 jersey this summer - Newsday

Paul O'Neill, Baseball Wiki