Here are the Yankees' 21 retired numbers
New York Yankees: The Numbers on the Wall
New York Yankees retired numbers: Is team too generous? - Sports Illustrated
Next retired number for every MLB team
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New York Yankees history: Paul O'Neill's number 21 must be retired
The Yankees Retire Paul O'Neill's Number 21 - The New York Times
The Yankees' unlucky number: Retire '13' so we can forget the sad A-Rod era – New York Daily News
New York Yankees to retire Paul O'Neill's jersey number during 2022 season - Sports Illustrated NY Yankees News, Analysis and More
New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21
Number 21 Continues to Remain Sacred to the New York Yankees, News, Scores, Highlights, Stats, and Rumors
