New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN

Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed

The Bronx Pinstripes Show - Yankees Podcast, Bronx Pinstripes

Paul O'Neill (baseball) - Wikipedia

Should Yankees put A-Rod in booth? YES! But buyer beware that he might go soft on Bombers – New York Daily News

New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN

Paul O'Neill (baseball) - Wikipedia