Here are the Yankees' 21 retired numbers

New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21

As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times

Why don't the Miami Marlins have any retired numbers?

Paul O'Neill Number Retirement before Yankees vs. Blue Jays on Sunday, August 21, 2022

Names and Numbers: NY Yankees

Uniform number (Major League Baseball) - Wikipedia

Paul O'Neill's No. 21 to Be Retired By Yankees – NBC New York

As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times

Tino Martinez, the Yankees' Mr. Meh, going to Monument Park

List of Major League Baseball retired numbers - Wikipedia

Rich tradition of retired numbers part of game's legacy

A-Rod: 'It bothers me' Yankees haven't retired my number : r/NYYankees

Yankees Retired Numbers - Who Are The 22 Yankees Who Wore Them

NY Yankees royalty honored as Paul O'Neill's No. 21 is retired

What should the Yankees do once they run out of numbers? - Pinstripe Alley

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