Infographic: Packers' retired numbers
How many teams in the NBA have retired number 23?
History of retired numbers dates back to Lou Gehrig Day
Infographic: Packers' retired numbers
File:SF Giants Retired Numbers.jpg - Wikipedia
Mets' retired numbers
Retired numbers: Packers couldn't even get that right in the gory years
Lot Detail - Chicago Blackhawks Retired Numbers Banner Frame
List of National Basketball Association retired numbers - Wikipedia
Yankees retired numbers and 23 legends who wore them
History By The Numbers (FLCeltsFan) - CelticsBlog
Every MLB team's retired numbers