Derek Jeter back as Yankees honor '98 team at Old-Timers' Day - ESPN
How many jersey numbers do the Yankees have left? - Deseret News
Jorge Posada, Baseball Wiki
Yankees to retire Paul O'Neill's No. 21: See the complete list of retired numbers
New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21
All About Sports Cards: Yankees to Retire Bernie Williams, Jorge Posada and Andy Pettitte Numbers and are the focus of Hump Day Hits
Bleeding Yankee Blue: WHY BERNIE WILLIAMS SHOULD NOT BE FORGOTTEN
Jorge Posada has his No. 20 retired by the Yankees - NBC Sports
Readers sound off on Yankees retired numbers, the GOP and the 9/11 Tribute Museum – New York Daily News