What's in a sports number? It's a matter of rules, and whimsy - Los Angeles Times
Over 47 years, the Nuggets have retired these 6 numbers
A number of nuggets about retired numbers around the Major League
Will LeBron James change his number on Lakers? NBA retires Bill Russell's No. 6 jersey - AS USA
Alex Rodriguez's honest reaction for the New York Yankees not retiring his jersey number
Bill Russell and Jackie Robinson: Why are they the NBA's and MLB's picks to retire their numbers from every team?
Paul O'Neill on No. 21 retirement Yankees
Smith: What Angels player will be next to have his number retired? – Orange County Register
Bill Russell: First player in NBA history to have his number retired from all teams
Colorado Rockies - Wikipedia