Serious Core Four Mo Mariano Rivera Derek Jeter Andy Petitte

With Mariano Rivera and Andy Pettitte retirements, Derek Jeter is all that's left of Yankees 'Core Four' – New York Daily News

Bernie Williams Deserves More Credit For Making The Yankees A Dynasty

Andy Pettitte completes career with complete game

Yankees: Core four propel Bombers

Bleeding Yankee Blue: 09/01/2013 - 10/01/2013

Yankee immortals - Andy Pettitte, Derek Jeter, Mariano Rivera, Jorge Posada, and Bernie Williams

Catching Up with the Core

Derek Jeter (Please excuse me) is Not Mariano Rivera

The Core Four – The Talon

Mo makes history

Lot of (4) New York Yankees Core Four OML Baseballs Signed by (4) with Derek Jeter

Andy Pettitte ends Yankees career in fitting fashion

Catching Up with the Core

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