Jorge Posada – Society for American Baseball Research
How Jorge Posada lit fires to reach Yankees immortality
Why Andy Pettitte deserves number retired, but Jorge Posada doesn
Jorge Posada, Baseball Wiki
Yankees retired numbers and the baseball legends who wore them
Source tells AP that longtime Yankee catcher Jorge Posada will retire
Reports: Yankees likely to retire Nos. 51 and 20 soon - River
The Greedy Pinstripes: Remembering Yankees of the Past: Jorge Posada
Core Four - Wikipedia
Yankees to retire numbers of Pettitte, Williams, Posada - Sports
Highlights of Jorge Posada's pregame ceremony at Yankee Stadium
Jorge Posada Number 20 Retirement Patch – The Emblem Source
Jorge Posada 20 Retirement Jersey Iron on Patch 4.25