Bernie Williams, Don Mattingly go to bat for charity
If the Boston Red Sox retired numbers like the New York Yankees do
Number 21 Continues to Remain Sacred to the New York Yankees
Bernie Williams – Society for American Baseball Research
Bernie Williams
Here are the Yankees' 21 retired numbers
Yankees Mag: The Warrior's Day Cometh
Yankees' Bernie Williams faced similar free-agency situation as
Yankees Will Retire Bernie Williams' No. 51 and Jorge Posada's No
Bernie Williams hits the right notes with classmates as former
Pinstripe Prestige: Yankee Numbers Most Likely Headed For Monument
Derek Jeter Lived a Dream, and Never Disappointed - The New York Times