Rod Kanehl, appearing as a pinch-hitter, hits the first grand slam in Mets history, going deep off Bobby Shantz in the eighth inning of the team’s 10-3 victory over the Cardinals at the Polo Grounds. The bases loaded round-tripper comes in the 79th game of the franchise’s existence.

On July 6, 1962 — Rod Kanehl, appearing as a pinch-hitter, hits the first grand slam in Mets history, going deep off Bobby Shantz in the eighth inning of the team’s 10-3 victory over the Cardinals at the Polo Grounds. The bases loaded round-tripper comes in the 79th game of the franchise’s existence.

Sources:
National Pastime January 28

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