Out of the Park Developments Online Manuals
List of National Basketball Association retired numbers - Wikipedia
File:Miller Park Retired Numbers (4953172314).jpg - Wikimedia Commons
File:49ers retired numbers at Candlestick Park 2010-08.JPG - Wikimedia Commons
History of Celtics retired numbers - CelticsBlog
Retired Numbers Washington capitals, Beaupre, History
A number of nuggets about retired numbers around the Major League
Every MLB team's retired numbers
Retired number new feature? : r/OOTP
Celtics' bland retired number banners are unworthy of the franchise's history
File:Retired Numbers in Left Field at Citi Field.jpg - Wikipedia
Retired Uniform Numbers in the American League
File:NYI Retired Number.JPG - Wikipedia