Here are the Yankees' 21 retired numbers Who belongs and who doesn't? Andy Pettitte, Jorge Posada, Bernie Williams, more
Andy Pettitte Stands Alone as the Only Legend to Wear No. 46 - WSJ
Yankees to retire numbers of Andy Pettitte, Jorge Posada and Bernie Williams - ABC7 New York
Jeter returns as Yankees honor 1998 team at Old-Timers' Day, Boone booed by some - ABC News
Yankees to dedicate Mariano Rivera's Monument Park plaque – The Denver Post
Yankees 'likely' to retire Bernie Williams, Jorge Posada numbers
New York Yankees retired numbers: Is team too generous? - Sports Illustrated
Yankees retire Jorge Posada's No. 20 in Monument Park
Yankees to retire Derek Jeter's number in May
Derek Jeter's No. 2, Last of Yankees' Single Digits, to Be Retired - The New York Times