Retired Uniform Numbers in the American League
Bill Russell gets Miami Heat No. 6 honor before LeBron James
Retired Uniforms by Division: National League East - Beyond the Box Score
The Seattle Mariners need to retire number 51 for two Hall of Famers
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Yankees Retired Numbers
Yankees Retired Numbers
History of retired numbers dates back to Lou Gehrig Day
Bill Russell's No. 6 is being retired across the NBA : NPR
Derek Jeter's No. 2, Last of Yankees' Single Digits, to Be Retired - The New York Times
Da Greats: Retired Chicago Bears Jersey Numbers - The Chicago Audible
Yankees retired numbers: A look at all of the jersey numbers players cannot wear in the Bronx
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Eagles Question of the Day: How do you feel about the team's unofficial retired jersey numbers? - Bleeding Green Nation
Buckley: Who's next? Examining the state of Boston's retired numbers - The Athletic
