New York Yankees: 5 numbers that need to be un-retired

Let's go, Oswald! 👊 - New York Yankees

Derek Jeter's No. 2, Never to Be Seen Again on Pinstripes at Yankee Stadium - The New York Times

Core Four - Wikipedia

NY Yankees Retired Numbers inside Yankee Stadium, The Bron…

Uniform numbers for Yankees coaches, managers could soon be thing of the past due to numbers shortage

Mariano Rivera - Wikipedia

Yankees retired numbers

15 Athletes Whose Numbers Were Unretired

Here are the Yankees' 21 retired numbers Who belongs and who doesn't? Andy Pettitte, Jorge Posada, Bernie Williams, more