Joe Torre - Wikipedia
Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed
Yankees to retire Torre's No. 6, leaving one single digit in pinstripes
Yankees Flex On MLB With Unique Request As They Run Out Of Numbers
Yankees to retire Joe Torre's No. 6 on Aug. 23
Joe Torre has No. 6 retired by New York Yankees - ESPN
New York Yankees History: Yankees Hire Joe Torre
Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed
Yankees retired numbers
Yankees Will Retire Numbers for Jorge Posada, Bernie Williams, Andy Pettitte - WSJ