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SAN FRANCISCO, CA - CIRCA 1967: Outfielder Curt Flood #21 of the St. Louis Cardinal leads off of second base against the San Francisco Giants during an Major League Baseball game circa 1967 at Candlestick Park in San Francisco, California. Flood played for the Cardinals from 1958-69. (Photo by Focus on Sport/Getty Images)

SAN FRANCISCO, CA - CIRCA 1967: Outfielder Curt Flood #21 of the St. Louis Cardinal leads off of second base against the San Francisco Giants during an Major League Baseball game circa 1967 at Candlestick Park in San Francisco, California. Flood played for the Cardinals from 1958-69. (Photo by Focus on Sport/Getty Images)