Posada retires from Yankees after 17 seasons, 5 titles

Derek Jeter announces that he will retire after 2014 season - Sports Illustrated

Yankees retired numbers and the baseball legends who wore them

Jeter, Posada & Rivera: The End Of An Era In The Bronx

Yankees set sights on 28th World Series title

Old Guard Pushes for a Seventh World Series - The New York Times

New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21

Yankees to retire Derek Jeter's No. 2 on May 14 – New York Daily News

Here are the Yankees' 21 retired numbers Who belongs and who doesn't? Andy Pettitte, Jorge Posada, Bernie Williams, more

The Core Four – The Talon

Jorge Posada - Wikipedia