Yankees: 3 NYY Legends Who Should Have Their Numbers Retired
The Yankees Retire Paul O'Neill's Number 21 - The New York Times
New York Yankees history: Paul O'Neill's number 21 must be retired
The Cubs should retire several more jersey numbers - Bleed Cubbie Blue
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
New York Yankees - Wikipedia
Yankees Retired Numbers
Names and Numbers: NY Yankees
New York Yankees retired Paul O'Neill's No. 21 jersey
The second-best Yankee to wear each retired number - Part One - Pinstripe Alley
Should the Yankees have retired A-Rod's No. 13?, Bronx Pinstripes
Yankees to retire Derek Jeter's No. 2 on May 14 – New York Daily News
Can we name every Yankees Retired Number in numerical order?
The Cubs should retire several more jersey numbers - Bleed Cubbie Blue