Former New York Yankees' Jorge Posada, left, and Andy Pettitte

37 New York Yankees Introduce Andy Pettitte Stock Photos, High-Res Pictures, and Images - Getty Images

Derek Jeter back as Yankees honor '98 team at Old-Timers' Day - ESPN

Derek Jeter's No. 2 officially retired by Yankees, National Sports

Jorge Posada wouldn't be surprised if Andy Pettitte changed his mind, returned to Yankees midseason – New York Daily News

Yankees core Four World Series Champions Andy

Girardi: Posada won't catch 'this week' - Newsday

Yankees' Posada plans to call it quits

Yanks to retire numbers for Williams, Pettitte, Posada

New York Yankees catcher Jorge Posada, left, visits starting pitcher Andy Pettitte in the first inning of Game 3 of the Major League Baseball World Series against the Philadelphia Phillies Saturday, Oct.

How The Yankees' 1990 Class Forged The Legendary Core Four

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

Remembering The 1996 Yankees: Core Was Truly A Fantastic 4 - CBS New York

Jorge Posada career highlights

A-Rod, Posada fuel Yankees sweep against Twins