This Day in Yankees History: Paul O'Neill's three homers spark playoff run- August 31, 1995 - Pinstripe Alley
Paul O'Neill Number Retirement before Yankees vs. Blue Jays on Sunday, August 21, 2022
Aaron Judge is slumping, but he's not missing by much - Pinstripe Alley
New York Yankees retired Paul O'Neill's No. 21 jersey
Paul O'Neill Yankees No. 21 retired
Paul O'Neill's No. 21 to be retired by Yankees
1998 Yankees Diary: Shane Spencer, Paul O'Neill provide the fireworks - Pinstripe Alley
Derek Jeter, Out of Pinstripes and in Monument Park, Can Finally Reflect - The New York Times
This Day in Yankees History: Hang on to the roof! - Pinstripe Alley
Paul O'Neill takes in 'biggest dream' of his life as Yankees retire No. 21
Yankees' retirement of Paul O'Neill's number might be a stretch - Pinstripe Alley