The Athletic] The Yankees have asked MLB if they can stop issuing
Yankees Retired Numbers - Who Are The 22 Yankees Who Wore Them
Yankees retired numbers: Paul O'Neill latest to be added to list
NY Yankees royalty honored as Paul O'Neill's No. 21 is retired
Paul O'Neill Yankees No. 21 retired
Ask Pinstripe Alley 1/11/17: Will the Yankees ever retire Paul O
New York Yankees Retired Players Numbers Sign 18x18”!! Your Choice
Yankees retired numbers ahead of Paul O'Neill's 2022 ceremony
Yankees Retired Numbers - Who Are The 22 Yankees Who Wore Them
Paul O'Neill's No. 21 to be retired by Yankees