While Jackie Robinson's breakthrough in 1947 opened the gates of opportunity for African Americans and other minority players, it was not until 1971 when a team first enjoyed a full and complete level of integration, with half of its twenty-five-man roster comprised of players of African American and Latino descent. That team was the Pittsburgh Pirates, managed by an old-time Irishman.
The Team that Changed Baseball: Roberto Clemente and the 1971 Pittsburgh Pirates [Book]
Pittsburgh Pirates to honor Roberto Clemente in perfect way
Early 1970's Roberto Clemente Game Worn Pittsburgh Pirates, Lot #80087
Pittsburgh Pirates, Notable Players, World Series, History, & Facts
Baseball Jersey worn by Pittsburgh Pirate Roberto Clemente
TSN Archives: Baseball Mourns Loss of Bucs Star Clemente (Jan. 13, 1973, issue)
Roberto Clemente Baseball at its Best
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1969 Roberto Clemente Game Worn Pittsburgh Pirates Pants., Lot #81381
Lot Detail - 1959 Roberto Clemente Pittsburgh Pirates Game-Used Home Flannel Jersey Vest
Roberto Clemente Pirates Debut