NY Yankees retire Paul O'Neill's No. 21
New York Yankees: The Numbers on the Wall
Bleeding Yankee Blue: RETIRING 21 ON 21!
Yankees to retire numbers of Pettitte, Posada and Williams
Jason Giambi retires, Yankees will honor Andy Pettitte, Jorge
Jeter's Number 2 Retired, Yankees Now Out of Single Digit Jerseys
Yankees to retire Pettitte's No. 46 in August
Jorge Posada Enshrined in Monument Park (VIDEO)
Weekend Digest: Hamels wants a trade; Giambi retires; Profar