New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN
Paul O'Neill's No. 21 to be retired by Yankees
Paul O'Neill Yankees No. 21 retired
New York Yankees Announce Retirement of Paul O'Neill's Number 21 – Celeb Secrets
The Yankees Retire Paul O'Neill's Number 21 - The New York Times
Paul O'neill New York Post
Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed - The San Diego Union-Tribune
Paul O'Neill's number to be retired by Yankees
Yankees' Todd Frazier will not wear Paul O'Neill's No. 21, will stick with No. 29 – New York Daily News