Paul O'Neill's No. 21 to be retired by Yankees
Yankees: Who Will Be The Next Player To Get Their Number Retired
Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed
Yankees' retirement of Paul O'Neill's number might be a stretch
Paul O'Neill Yankees No. 21 retired
Number 21 Continues to Remain Sacred to the New York Yankees
Yankees will retire Paul O'Neill's No. 21 jersey in August at
Paul O'Neill (baseball) - Wikipedia
If we must retire one more Yankee number . . .
This Day in Yankees History: The trade that sent Paul O'Neill to