Fergie Jenkins (7-2) pitches and bats the Cubs to a 6 – 4 win over San Diego. Jenkins hits a two-run home run and finishes his 7th game in eight starts. Billy Williams connects for his 300th home run.

On May 15, 1971 — Fergie Jenkins (7-2) pitches and bats the Cubs to a 6 – 4 win over San Diego. Jenkins hits a two-run home run and finishes his 7th game in eight starts. Billy Williams connects for his 300th home run.

Source:
Baseball Reference May 15