Andy Pettitte, Jorge Posada, Bernie Williams to have numbers retired by Yankees
Chuck Knoblauch blasts Yankees on Andy Pettitte jersey retirement
Here are the Yankees' 21 retired numbers Who belongs and who doesn't? Andy Pettitte, Jorge Posada, Bernie Williams, more
Yankees to retire Paul O'Neill's No. 21 jersey this summer - Newsday
NY Yankees royalty honored as Paul O'Neill's No. 21 is retired
Sunday Gravy: Yankees would rather retire No. 13
Andy Pettitte comes out of retirement to rejoin Yankees
Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed
Derek Jeter's No. 2, Last of Yankees' Single Digits, to Be Retired - The New York Times