Yankees retire Andy Pettitte's number, give him plaque in Monument Park
MLB Jersey Numbers on X: As the @Yankees announce the retirement of Derek Jeter's number, they remain leaps and bounds above the rest of the league in the category. / X
The Yankees have a lot of retired numbers. Other teams should try to be more like them. - NBC Sports
Yankees Retire Paul O'Neill's No. 21 Jersey, Cashman Booed - Bloomberg
Should Alex Rodriguez's number 13 be retired by the New York Yankees?
Yankees retire Paul O'Neill's No. 21 jersey - NBC Sports
A mathematical examination of when the Yankees will run out of numbers to retire
Jeter returns as Yankees honor 1998 team at Old-Timers' Day, Boone booed by some
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Have the Yankees taken retired numbers too far?, Bronx Pinstripes
New York Yankees Retired Numbers: Who's Next?, News, Scores, Highlights, Stats, and Rumors
NY Yankee Paul O'Neill's No. 21 to be retired on Aug. 21