The members of the “Core Four” have been the faces of the New York Yankees for many years. As the 2010 season comes to a close, one must realize that the Core Four cannot go on forever.

Andy Pettitte turns 39.

Derek Jeter turns 37.

Jorge Posada turns 40.

The Great Mariano Rivera turns 41 this November.

The great question is: How many more years will the Core Four continue to play?

Here is my observation of the Core Four, future Yankee legends.

Begin Slideshow