Retired Uniform Numbers in the National League
List of Major League Baseball retired numbers - Wikipedia
Fascinating Aspects About the Retired Uniform Numbers of the Detroit Tigers – Society for American Baseball Research
Banks, Ernie #14 - Game Played Relic – Stadium Pen Blanks
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Dave Stewart wore A's No. 34 with Rollie Fingers' blessing. Now both will have it retired
Every MLB team's retired numbers – NBC Sports Chicago
Retired Uniform Numbers in the National League
Every MLB team's retired numbers
A number of nuggets about retired numbers around the Major League
Which pro sports teams have the most retired numbers?