List of NCAA football retired numbers - Wikipedia
List of National Football League retired numbers - Wikipedia
Chicago Bears, American Football Wiki
Denver Broncos, American Football Wiki
England national football team - Wikipedia
List of Major League Baseball retired numbers - Wikipedia
List of Major League Baseball retired numbers - Wikipedia
List of National Football League retired numbers, American Football Database
Atlanta Braves - Wikipedia
List of NCAA football retired numbers - Wikipedia
List of National Football League retired numbers - Wikipedia
Arizona Cardinals Team History and Timeline - Sports Illustrated
List of NCAA men's basketball retired numbers - Wikipedia
Miami Marlins - Wikipedia
List of NCAA football retired numbers - Wikipedia