As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
Have the NY Yankees retired too many numbers? - Quora
Have the NY Yankees retired too many numbers? - Quora
Yankees will retire Paul O'Neill's No. 21 jersey number on Aug. 21
Paul O'Neill on No. 21 retirement Yankees
New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN
Paul O'Neill Yankees No. 21 retired
Paul O'Neill's No. 21 to be retired by Yankees
New York Yankees history: Paul O'Neill's number 21 must be retired
Paul O'Neill will finally have number retired by Yankees
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
New York Yankees history: Paul O'Neill's number 21 must be retired
Paul O'Neill Yankees No. 21 retired
Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed