Yankees to Retire Paul O'Neill's Number 21
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN
New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21 - NBC Sports
NY Yankees retire Paul O'Neill's No. 21
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
NY Yankees retire Paul O'Neill's No. 21
New York Yankees to retire All-Star Paul O'Neill's No. 21 jersey
Paul O'Neill, Baseball Wiki