Fresno State to retire numbers of Aaron Judge, Mike Batesole
Yankees Retired Numbers - Who Are The 22 Yankees Who Wore Them
New York Yankees to retire All-Star Paul O'Neill's No. 21 jersey
Readers sound off on Yankees retired numbers, the GOP and the 9/11 Tribute Museum – New York Daily News
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
Yankees Retired Numbers - Who Are The 22 Yankees Who Wore Them
Every MLB team's retired numbers – NBC Sports Chicago
Paul O'Neill Yankees No. 21 retired
List of Major League Baseball retired numbers - Wikipedia
VIDEO: Yankees Great Mariano Rivera Bids A Tearful Goodbye : The Two-Way : NPR
NY Yankees royalty honored as Paul O'Neill's No. 21 is retired
Southern California teams' retired numbers – Orange County Register
Yankees retired numbers and the baseball legends who wore them
Here are the Yankees' 21 retired numbers Who belongs and who doesn't? Andy Pettitte, Jorge Posada, Bernie Williams, more