Yankees to retire Paul O'Neill's No. 21: See the complete list of retired numbers
Full List of Boston Red Sox Retired Numbers
Red Sox add Carlton Fisk among retired numbers - The Boston Globe
Readers sound off on Yankees retired numbers, the GOP and the 9/11 Tribute Museum – New York Daily News
Predicting the Next Retired Number for Every Team - The Crawfish Boxes
Yankees Retired Numbers
New York Yankees Retired Numbers Vinyl Decal Stickers
Red Sox: Case against retiring numbers at Fenway Park
Boston Red Sox retired numbers: From Bobby Doerr to Pedro Martinez
Retired Numbers
Red Sox Retired Numbers
Boston Red Sox - Today in #RedSox History: Carlton Fisk's no. 27 became the 5th number retired by the #RedSox.