The Yankees Retire Paul O'Neill's Number 21 - The New York Times
Yankees: Who Will Be The Next Player To Get Their Number Retired? - Unhinged New York
Andy Pettitte, Jorge Posada, Bernie Williams to have numbers retired by Yankees
Alex Rodriguez's honest reaction for the New York Yankees not retiring his jersey number
Paul O'Neill's No. 21 Jersey to Be Retired by Yankees on August 21, News, Scores, Highlights, Stats, and Rumors
A number of nuggets about retired numbers around the Major League
On the Yankees, retired numbers and a solution in search of a problem
New York Yankees retired numbers: Is team too generous? - Sports Illustrated
Retired Numbers and The Yankees - NBC Sports