At Atlanta Stadium, Hal Breeden of the Expos becomes only the second major leaguer to pinch-hit home runs in both ends of a doubleheader. On June 17, 1943, Red Sox player-manager Joe Cronin accomplished the feat against the Philadelphia A’s. Expo pinch-hitter Jim Lyttle also adds a homer. Montreal outslugs Atlanta, 11 – 7 in the first game, and the Braves return the favor, 15 – 6, in the second.

This Day In Baseball

On July 13, 1973At Atlanta Stadium, Hal Breeden of the Expos becomes only the second major leaguer to pinch-hit home runs in both ends of a doubleheader. On June 17, 1943, Red Sox player-manager Joe Cronin accomplished the feat against the Philadelphia A’s. Expo pinch-hitter Jim Lyttle also adds a homer. Montreal outslugs Atlanta, 11 – 7 in the first game, and the Braves return the favor, 15 – 6, in the second.

Source
Baseball Reference July 13