The Yankees have retired so many numbers that they're down to just
Uniform numbers for Yankees coaches, managers could soon be thing of the past due to numbers shortage
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
Have the NY Yankees retired too many numbers? - Quora
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Here are the Yankees' 21 retired numbers Who belongs and who doesn't? Andy Pettitte, Jorge Posada, Bernie Williams, more
The New York Yankees Could Run Out of Jersey Numbers After Retiring Them - What Happens Next? - EssentiallySports
The Astros Should Retire Lance Berkman and Roy Oswalt's Numbers - The Crawfish Boxes
Yankees notebook: Joe Torre talks numbers, healing
Why don't the Mets retire more jersey numbers? – Mets360
NY Yankee Paul O'Neill's No. 21 to be retired on Aug. 21
New York Yankees: Retiring numbers, plaque ceremonies must end
White Sox' retired numbers wall gets a little more crowded - South Side Sox
High and Tight: Our Rock & Roll Baseball Experts Talk Retired Numbers
Washington Nationals news & notes: Nats win 2 of 3 with Yankees; Stephen Strasburg set to retire; Stone Garrett update - Federal Baseball
New York Yankees star Paul O'Neill tops list of best MLB from Columbus