Retired Numbers, History
File:Adelaide 36ers retired numbers.jpg - Wikipedia
Yankees retired numbers and 23 legends who wore them
History of Celtics retired numbers - CelticsBlog
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A number of nuggets about retired numbers around the Major League
List of National Football League retired numbers - Wikipedia
Mets Retired Numbers. On April 15, 1997 in a historic…, by New York Mets
The Yankees Retired Derek Jeter's Number, and Things Got Slightly Weird
Houston Astros: Top 30 players in franchise history - Page 28
Retired Uniform Numbers in the National League
Da Greats: Retired Chicago Bears Jersey Numbers - The Chicago Audible