File:Banks-Santo retired numbers.jpg - Wikipedia
File:Miller Park Retired Numbers (4952579861).jpg - Wikimedia Commons
Retired number - Wikipedia
Retired number - Wikipedia
Giants Ring of Honor, Giants History
List of Green Bay Packers retired numbers - Wikipedia
List of National Basketball Association retired numbers - Wikipedia
Every MLB team's retired numbers
Every MLB team's retired numbers
Mets Retired Numbers. On April 15, 1997 in a historic…, by New York Mets
Retired Uniform Numbers in the American League
Colorado Avalanche Retire Six Numbers in Franchise History - BVM Sports
Out of the Park Developments Online Manuals
Sacco Sez: Signs of a great history
History of retired numbers dates back to Lou Gehrig Day