Which pro sports teams have the most retired numbers?
2010-11 Limited Retired Numbers Silver Spotlight #16 Henri Richard/49
Players who have come out of retirement
Best Red Sox players by uniform number
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Infographic: Packers' retired numbers
Are there any jersey numbers that are retired across all teams? - Quora
Retired number - Wikipedia
The most random number retirements across all sports
MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
List of Major League Baseball retired numbers - Wikipedia
The most random number retirements across all sports
The Real Madrid Way: How Values Created the Most Successful Sports Team on the Planet: 9781942952541: Mandis, Steven G.: Books
How Many Jersey Numbers have been Retired in the NFL?
History of retired numbers dates back to Lou Gehrig Day
