Bill Russell: First player in NBA history to have his number retired from all teams
Bill Russell's No. 6 being retired across NBA, a 1st for league
NBA will retire the No. 6 jersey across the league in honor of Celtic legend Bill Russell
Why are NBA players wearing No. 6 on their jerseys? – NBC Sports Chicago
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Bill Russell dies at 88: A look at the Celtics legend's illustrious NBA career by the numbers
NBA to retire Bill Russell's No. 6 jersey throughout the league as tribute to the 11-time champion
Orlando Magic have plenty of jerseys to retire when they're ready
Celtics Legend Bill Russell's No. 6 To Be Retired Across NBA
Bill Russell's No. 6 jersey to be retired throughout NBA
NBA, NBPA retiring Bill Russell's No. 6 across the league