The Giants connect for a team-record seven home runs in a 11 – 1 home win over the Pirates. Willie Mays, Daryl Spencer and Wes Westrum each connect for 2. Hank Thompson, Westrum, and Spencer hit consecutive homers in the 4th inning.

On July 8, 1956 — The Giants connect for a team-record seven home runs in a 11 – 1 home win over the Pirates. Willie Mays, Daryl Spencer and Wes Westrum each connect for 2. Hank Thompson, Westrum, and Spencer hit consecutive homers in the 4th inning.

Source:
Baseball Reference July 8