The Houston Astros set a National League record by turning seven double plays against the San Francisco Giants, with first baseman Curt Blefary taking part in all of them. The many twin killings help the Astros to win the game, 3 – 1.

On May 4, 1969 — The Houston Astros set a National League record by turning seven double plays against the San Francisco Giants, with first baseman Curt Blefary taking part in all of them. The many twin killings help the Astros to win the game, 3 – 1.

Source:
Baseball Reference May 4