List of Major League Baseball retired numbers - Wikipedia
List of NCAA men's basketball retired numbers - Wikipedia
Retired number - Wikipedia
New York Mets - Wikipedia
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St. Louis Cardinals - Wikipedia
Rich tradition of retired numbers part of game's legacy
Every MLB team's retired numbers – NBC Sports Chicago
A number of nuggets about retired numbers around the Major League
Major League Baseball - Wikipedia
Montreal Expos - Wikipedia
List of Major League Baseball career doubles leaders - Wikipedia
