Boston has retired 23 jersey numbers-these are the players so honored
LeBron James will join this list of NBA players with numbers retired by multiple teams – NBC Los Angeles
Bill Russell's No. 6 is being retired across the NBA : NPR
Boston Celtics legend Bill Russell to have number retired across NBA
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LeBron on course to join legends with jerseys retired by multiple teams
Boston has retired 24 jersey numbers-these are the players so honored
Boston has retired 24 jersey numbers-these are the players so honored
The Most Deserving Player for Each NBA Franchise's Next Jersey Retirement, News, Scores, Highlights, Stats, and Rumors
LeBron James to change jersey number back to 23 in honor of Bill Russell - ESPN
Every retired number for the Celtics and who wore it
Future MLB jersey numbers likely to be retired