Every MLB team's retired numbers
List of Major League Baseball retired numbers - Wikipedia
Yankee Retired Numbers: The All-Time Numerical Lineup of Yanks
Ranking MLB Teams With the Most Retired Numbers of All-Time
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History of retired numbers dates back to Lou Gehrig Day
MLB lockout: Take a look at baseball's billionaire team owners - Los Angeles Times
When every baseball team will run out of uniform numbers - All My Sports Teams Suck
Uniform number (Major League Baseball) - Wikipedia
List of retired numbers in association football - Wikipedia
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