Why are MLB players wearing 21? Tributes around the league for Pirates(00)

Image attachment from: The Story Behind MLB Players Wearing Number 21
Why are MLB players wearing 21? Tributes around the league for Pirates(00)

More Images from: The Story Behind MLB Players Wearing Number 21

Why are MLB players wearing 21? Tributes around the league for PiratesSome MLB Players Wearing 21, All Wearing 21 Patches Today for RobertoYankees Stars Wear No. 21 To Honor Roberto Clemente On His DaySome MLB Players Wearing 21, All Wearing 21 Patches Today for RobertoSome MLB Players Wearing 21, All Wearing 21 Patches Today for RobertoSome MLB Players Wearing 21, All Wearing 21 Patches Today for Roberto