List of National Football League retired numbers, American Football Database
List of National Football League retired numbers - Wikipedia
NFL Relaxes Restrictions on Jersey Numbers - The New York Times
Eagles Question of the Day: How do you feel about the team's unofficial retired jersey numbers? - Bleeding Green Nation
Nfl Retired Numbers By Team Sale, SAVE 47%
All 32 NFL team's retired jersey numbers - ESPN - NFL Nation- ESPN
Three retired numbers back in use for CU Buffs football – BuffZone
The next likely jersey retirement for every NFL team
File:New Jersey Devils retired numbers 27 3 4 in Feb 2013.jpg - Wikipedia
List of National Basketball Association retired numbers - Wikipedia
Colts Will Unveil Peyton Manning Statue, Retire No. 18, Add QB to Ring of Honor, News, Scores, Highlights, Stats, and Rumors
Every MLB team's retired numbers – NBC Sports Chicago
List of National Football League retired numbers - Wikipedia
Retired Numbers for Each NFL Team