The Yankees Retire Paul O'Neill's Number 21 - The New York Times
Readers sound off on Yankees retired numbers, the GOP and the 9/11 Tribute Museum – New York Daily News
How Paul O'Neill Stacks Up Against the Other Yankees With Retired Numbers
Yankees Retired Numbers: 5 Fast Facts You Need to Know
Judge hits 3 home runs, becomes first Yankees player to do it twice in one season – NewsNation
Judge hits 3 home runs, becomes first Yankees player to do it twice in one season
As cases for Roy Halladay and Dick Allen point out, baseball's retired numbers are multiplying
Six Baseball Stars Get Singular Honor As Teams Will Retire Their Jerseys
New York Yankees: 5 numbers that need to be un-retired
Number 21 Continues to Remain Sacred to the New York Yankees, News, Scores, Highlights, Stats, and Rumors
New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21
Aaron Boone, coaches could lose numbers with Yankees running out
What the Yankees' uniform number crunch could cost MLB's managers and coaches - The Athletic
Power of Derek Jeter's No. 2 - MLB's most productive jersey numbers