Yankees to retire numbers of Pettitte, Posada and Williams
Yankees retire Jorge Posada's No. 20
Yankees also retiring numbers for Bernie Williams and Jorge Posada
Yankees next retired number prediction
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Yankees to retire numbers of Pettitte, Posada and Williams
Yankees to retire Derek Jeter's number on May 14 - SI Kids: Sports News for Kids, Kids Games and More
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Bernie Williams, Jorge Posada, Andy Pettitte, and Willie Randolph to be honored in Monument Park - Pinstripe Alley
Core Four - Wikipedia
A mathematical examination of when the Yankees will run out of numbers to retire
Forty-six shades of pinstripe hypocrisy? A-Rod, PEDs and the Yankee Way
Former New York Yankee Paul O'Neill, 4th from left, poses for a photograph with, from left, former trainer Gene Monahan, former teammates Jorge Posada, Bernie Williams, Mariano Rivera, Tino Martinez and Andy
