Team Issued Roberto Clemente Day Blank Jersey - PIT vs. CIN - 9/15/2021

How baseball changed forever in 1972: A timeline of MLB's most memorable events, 50 years later

MLB Gameday: Reds 4, Pirates 5 Final Score (09/15/2021)

Rox Sweep Rochester, Twins Fall to Rangers Late

PITTSBURGH PIRATES ROBERTO CLEMENTE DAY 21 HAT SGA CAP 9/15/2023

A Mystery Surrounding the Roberto Clemente '21' Patch

21 - Team Issued White Pinstripe Jersey - Roberto Clemente Day - Mets vs. Pirates - 9/15/22 - Mets Win 7-1

Yard Goats to Retire Hall of Famer Roberto Clemente #21 at Dunkin' Donuts Park

21 - Team Issued White Pinstripe Jersey - Roberto Clemente Day - Mets vs. Pirates - 9/15/22 - Mets Win 7-1

Why are MLB players wearing 21? Tributes around the league for Pirates legend explained

Today in History, December 31, 1972: Roberto Clemente killed in plane crash bringing relief supplies to Nicaragua

Roberto Clemente - Wikipedia

Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News