At San Francisco, the Braves and Giants split a pair. After the Giants win the opener, 5 – 2, the Braves take the nitecap, 6 – 5, in 11 innings. Orlando Cepeda connects for a grand slam and solo homer for Atlanta, while Willie McCovey has a three-run home run for San Francisco. The Braves win it in the 10th when Ralph Garr scores after collecting his fourth hit.

On May 9, 1971 — At San Francisco, the Braves and Giants split a pair. After the Giants win the opener, 5 – 2, the Braves take the nitecap, 6 – 5, in 11 innings. Orlando Cepeda connects for a grand slam and solo homer for Atlanta, while Willie McCovey has a three-run home run for San Francisco. The Braves win it in the 10th when Ralph Garr scores after collecting his fourth hit.

Source:
Baseball Reference May 9