Retired Uniform Numbers in the National League
Retired Uniform Numbers in the American League
NBA Retires Bill Russell's Number 6 League-Wide, Memorial Patches for All Teams in 2022-23 – SportsLogos.Net News
MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
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UCLA honors Jackie Robinson by retiring number 42 across all sports
A number of nuggets about retired numbers around the Major League
Infographic: Packers' retired numbers
What is the retiring age of MLB? - Quora
Banks, Ernie #14 - Game Played Relic – Stadium Pen Blanks
Fresno State Athletics announces Judge, Batesole jersey retirement - Fresno State
History of retired numbers dates back to Lou Gehrig Day