Major jersey number changes at Pirates

Pittsburgh Pirates Top 43 Prospects

Best Pirates players by uniform number

The best players to wear every jersey number in Pirates history - The Athletic

Strikeout numbers are still stubbornly high in MLB despite rules changes

No push for postseason changes despite Pirates' predicament

Roberto Clemente Jersey, Roberto Clemente Gear and Apparel

MLB Offseason: Pittsburgh Pirates Q&A - Part two - Bucs Dugout

MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago

A Numbers Game: A look at how every Cubs player — and the manager — picked their jersey number - Marquee Sports Network

Every uniform number ever, ranked by value

Last MLB jersey number issued