Yankees make major request to MLB due to unique problem
Yankees Will Retire Numbers for Jorge Posada, Bernie Williams, Andy Pettitte - WSJ
List of Yankee Retired Numbers in Monument Park - Newsday
SEE IT: Mets take a shot at Monument Park in Twitter fight with Yankees – New York Daily News
Yankee stadium monument park hi-res stock photography and images - Alamy
Yankees retired numbers ahead of Paul O'Neill's 2022 ceremony
Yankees retired numbers: A look at all of the jersey numbers players cannot wear in the Bronx
Legends honored at Yankees' Monument Park
The Yankees have retired so many numbers that they're down to just four available for new recruits: 38, 50, 57 and 69. : r/baseball