Yankees retired numbers
Yankees Retire Andy Pettitte's Uniform #46
Derek Jeter's No. 2 retired: See all New York Yankees retired
Monument Park (Yankee Stadium) - Wikipedia
Have The New York Yankees Retired Too Many Numbers?
During Dry Spell, Yankees Emphasize Monument Park - The New York Times
Jeter's No 2 retired by Yanks; Monument Park plaque unveiled
Paul O'Neill on No. 21 retirement Yankees
Andy Pettitte's number to be retired by Yankees