Retired Uniform Numbers in the American League

Lakers News: First Great Lakers Center Will Have Jersey Posthumously Retired - All Lakers

List of Major League Baseball retired numbers - Wikipedia

How many teams in the NBA have retired number 23?

Every MLB team's retired numbers

NFL on CBS - If the #NFL were to retire any player's

Derek Jeter's No. 2, Last of Yankees' Single Digits, to Be Retired - The New York Times

Eagles Question of the Day: How do you feel about the team's unofficial retired jersey numbers? - Bleeding Green Nation

Retired number - Wikipedia

Buckley: Who's next? Examining the state of Boston's retired numbers - The Athletic

Retired Uniform Numbers in the American League

New York Yankees retired Paul O'Neill's No. 21 jersey

How players are using uniform numbers to break MLB's unwritten rules - ESPN

Yankees Retired Numbers

Infographic: Packers' retired numbers

History of retired numbers dates back to Lou Gehrig Day