A number of nuggets about retired numbers around the Major League

What's in a sports number? It's a matter of rules, and whimsy - Los Angeles Times

NBA -- Inside the numbers on the NBA's retired numbers - ESPN

Why does Nuggets' Nikola Jokic wear No. 15? Carmelo Anthony's retirement sparks debate about jersey number

A number of nuggets about retired numbers around the Major League

The Most Deserving Player for Each NBA Franchise's Next Jersey Retirement, News, Scores, Highlights, Stats, and Rumors

Alex Rodriguez's honest reaction for the New York Yankees not retiring his jersey number

LeBron on course to join legends with jerseys retired by multiple teams

Nuggets Ought to Retire Carmelo Anthony Uniform When Jokic Finishes

List of Major League Baseball retired numbers - Wikipedia