Last Saturday the Core Four, or in this case the Key Three, took another hit when Jorge Posada decided to call it quits. Read HERE. This now leaves the Yankees with two members left of the original Core Four in Derek Jeter and Mariano Rivera. In fact, the Cour Four could take another hit after the 2012 season, as Mariano Rivera's contract will be up, and at the age of 42, approaching 43, with nothing else left to prove, I can see him calling it quits. Anyway, as Yankee fans, we're going to have to think about the next Cour Four as the current Cour Four is shrinking by the year.Before I get to my proposed new Core Four, I believe we can all agree that in order to be a Core Four member you must be someone who was drafted, or signed as an international free agent at a very young age by the...

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