In the first game of a doubleheader, Gene Freese blasts his third grand slam of the year as the Phils top the Cards, 11 – 0, at home.

On July 9, 1959 — In the first game of a doubleheader, Gene Freese blasts his third grand slam of the year as the Phils top the Cards, 11 – 0, at home.

Source:
Baseball Reference July 9