On September 1, 1971 the Pittsburgh Pirates played the Philadelphia Phillies at Three Rivers Stadium, the Pirates
starting lineup was:
Rene Stennett 2B
Gene Clines CF
Roberto Clemente RF
Willie Stargell LF
Manny Sanguillen C
Dave Cash 3B
Al Oliver 1B
Jackie Hernandez SS
Dock Ellis P

This was the first time in major league baseball that all
the starting players were black.