Has the NFL Ever Retired a Player's Jersey Number League-Wide?
List of NCAA football retired numbers - Wikipedia
List of NCAA men's basketball retired numbers - Wikipedia
List of NCAA men's basketball retired numbers - Wikipedia
List of NCAA men's basketball retired numbers - Wikipedia
List of defunct National Football League franchises - Wikipedia
List of NCAA football retired numbers - Wikipedia
National Football League, American Football Wiki
St. Louis Cardinals - Wikipedia
What are some “unofficially” retired numbers that are not reissued
List of NCAA football retired numbers - Wikipedia
I created a mock Wikipedia page, complete with subsections and
List of National Football League retired numbers - Wikipedia
Retired number - Wikipedia