NBA jersey retirements: Kobe's two numbers, Jordan's jersey in
Last player to wear No. 42 for each MLB team
NBA -- Inside the numbers on the NBA's retired numbers - ESPN
How players are using uniform numbers to break MLB's unwritten
Infographic: Packers' retired numbers
Every MLB team's retired numbers
NBA to retire Bill Russell's number league-wide: Which current NBA
What the Yankees' uniform number crunch could cost MLB's managers
Yankees Retired Numbers
Every NBA Team's Retired Numbers - Fadeaway World
Future MLB jersey numbers likely to be retired
History of retired numbers dates back to Lou Gehrig Day
History of retired numbers dates back to Lou Gehrig Day
Retired Uniform Numbers in the American League