Bill Russell and Jackie Robinson: Why are they the NBA's and MLB's picks to retire their numbers from every team?

Only 3 NBA Players Have Had Their Jerseys Retired By A Team They Didn't Play For - Fadeaway World

April 15, 1977: A second team retires Hank Aaron's No. 44 (plus more fun with retired numbers)

Lakers leave Celtics rivalry aside to honor Bill Russell's legendary No.6

Celtics Legend Bill Russell's No. 6 Jersey to Be Permanently Retired by NBA, News, Scores, Highlights, Stats, and Rumors

Game 7 Sports Club - Will we ever see another number retired league-wide? Only three players in North American professional sports leagues have ever had their number retired across their leagues

Only 3 Legendary Athletes Have Their Numbers Retired League Wide - The Spun: What's Trending In The Sports World Today

Charania] The NBA will retire the No. 6 league-wide honoring the late, legendary player and activist Bill Russell. : r/nba

Bill Russell tribute: NBA to retire the No. 6 league-wide in honor of Celtics legend - DraftKings Network

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In New Documentary, Ken Burns Reflects On Jackie Robinson's Legacy