History of retired numbers dates back to Lou Gehrig Day
America's Tragic Hero: The Yankees's Lou Gehrig
Lou Gehrig, First To Have Number Retired, Launched A Major Tradition
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Lou Gehrig's disease: Why ALS is forever associated with one of America's baseball greats
Major League Baseball Celebrates Lou Gehrig Day - Columbia University Athletics
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MLB will hold annual Lou Gehrig Day on June 2, Trending
List of Major League Baseball retired numbers - Wikipedia
MLB will hold annual Lou Gehrig Day on June 2, Trending
70 years after his death, baseball observes inaugural Lou Gehrig Day
Lou Gehrig Day's reminder of why your help is still needed National News - Bally Sports
Retired Number Series: Cincinnatti Reds The Harvard Sports Analysis Collective
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The Athletic] The Yankees have asked MLB if they can stop issuing uniform numbers to their manager and coaches because they're running out of numbers that aren't retired : r/baseball
Yankees Retired Numbers