Indianapolis Colts - Wikipedia
Boston Red Sox - Wikipedia
St. Louis Cardinals - Wikipedia
List of National Hockey League retired numbers - Wikipedia
Retired number - Wikipedia
List of National Football League retired numbers - Wikipedia
List of retired numbers in association football - Wikipedia
Seattle Seahawks - Wikipedia
List of National Football League retired numbers - Wikipedia
Coaching History — Hoosier Huddle
List of NCAA football retired numbers - Wikipedia
Arizona Cardinals Team History and Timeline - Sports Illustrated