MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
The best players to wear every jersey number in Pirates history - The Athletic
The best players to wear every jersey number in Pirates history - The Athletic
Cincinnati Reds: Who was the best player in team history to wear No. 7?
Pittsburgh Pirates Unveil New City Connect Uniform: Bleeding Black and Gold – SportsLogos.Net News
The best players to wear every jersey number in Pirates history - The Athletic
Every uniform number ever, ranked by value
Uniform number (Major League Baseball) - Wikipedia
Best Pirates players by uniform number
The best players to wear every jersey number in Pirates history - The Athletic