Yankees retire Jorge Posada's No. 20 in Monument Park
Andy Pettitte Stands Alone as the Only Legend to Wear No. 46 - WSJ
Sunday Gravy: Yankees would rather retire No. 13
Yankees retired numbers and the baseball legends who wore them
Jason Giambi retires, Yankees will honor Andy Pettitte, Jorge Posada and Bernie Williams and more MLB news
Retirement of Jeter's number brings back many memories - New York Amsterdam News
Derek Jeter's No. 2 retired: See all New York Yankees retired numbers
Derek Jeter's No. 2, Last of Yankees' Single Digits, to Be Retired - The New York Times
A mathematical examination of when the Yankees will run out of numbers to retire
Yankees retire Andy Pettitte's number
New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21
Yankees to Wear Bernie Williams Patch on May 24th – SportsLogos.Net News