Which pro sports teams have the most retired numbers?

Every NBA Team's Retired Numbers - Fadeaway World

A number of nuggets about retired numbers around the Major League

Retired number - Wikipedia

Will LeBron James change his number on Lakers? NBA retires Bill Russell's No. 6 jersey - AS USA

Every MLB team's retired numbers

Retired number - Wikipedia

List of National Football League retired numbers - Wikipedia

Players who have come out of retirement

Bill Russell's No. 6 Joins Rare Class of Retired Jersey Numbers - The New York Times

Most iconic NBA numbers: #34 – Shaquille O'Neal, Charles Barkley, Hakeem Olajuwon, NBA News

Meet the 16 out gay and bi players in NFL history - Outsports

Bill Russell's No. 6 Joins Rare Class of Retired Jersey Numbers - The New York Times

History of Giants' retired jersey numbers

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