File:Los Angeles Kings - Retired Numbers of Superstars - Staples Center - Los Angeles, CA - USA (6914447045).jpg - Wikipedia
File:Mets Retired Numbers.jpg - Wikipedia
File:49ers retired numbers at Candlestick Park 2010-08.JPG - Wikimedia Commons
Giants Ring of Honor, Giants History
Every MLB team's retired numbers
File:Retired Numbers, Louisiana Superdome, New Orleans (37) (3938562169).jpg - Wikimedia Commons
File:Brooklyn Nets vs NY Knicks 2018-10-03 td 17 - Nets Retired Numbers.jpg - Wikipedia
History of Celtics retired numbers - CelticsBlog
Today in New York Rangers history: Vic Hadfield's #11 retired
List of NCAA men's basketball retired numbers - Wikipedia
Utah Jazz Legends, Retired numbers, CharleyMarley
Retired Jerseys - BYU Athletics - Official Athletics Website - BYU Cougars
Los Angeles Lakers retired numbers: List of all jerseys retired by NBA team
Have the Yankees taken retired numbers too far?, Bronx Pinstripes
File:Devils' Retired Numbers.JPG - Wikimedia Commons