How many teams in the NBA have retired number 23?
List of National Football League retired numbers - Wikipedia
Why are all NBA Players Wearing the Number 6? – SportsLogos.Net News
LeBron James will join this list of NBA players with numbers retired by multiple teams – NBC Los Angeles
Complete list of retired numbers in the NBA - AS USA
Nba Retired Numbers
Bill Russell's No. 6 jersey to be retired throughout NBA
NBA players who currently wear untouchable Bill Russell's No. 6 jersey / News
LeBron James will switch back to jersey number 23 'out of respect' for the late Bill Russell
Which NBA team retired number 23? - Quora