State of the New York Yankees: An up-and-down opening
NY Yankees royalty honored as Paul O'Neill's No. 21 is retired
This Day in Yankees History: Paul O'Neill's three homers spark playoff run- August 31, 1995 - Pinstripe Alley
Opposing fans need to shut up about Yankees retiring Paul O'Neill's number
Emotional Andy Pettitte says thanks as New York Yankees retire his No 46 shirt, New York Yankees
February 25 – Happy Birthday Paul O'Neill
Paul O'Neill talks jersey number retired by New York Yankees
Pavely Photography
Yankees to retire Paul O'Neill's No. 21 jersey on Aug. 21
Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed
Yankees lose to Jays 5-2 for 15th defeat in 19 games
Predicting the Next Retired Number for Every Team - The Crawfish Boxes
1999: Stand clear of the closing doors - Amazin' Avenue
If we must retire one more Yankee number . . .
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times