|| Dick Ruthven (8–5) || Neil Allen (9) || 21,635 || 2–5(36–26) |- style="background:#fbb" | 63 || August 18 || @ Reds || 1–3 || Tom Seaver (8–2) || Steve Carlton (9–3) || Tom Hume (8) || 25,363 || 2–6(36–27) |- style="background:#fbb" | 64 || August 19 || @ Reds || 3–6 || Tom Hume (6–2) || Sparky Lyle (5–2) || None || 23,133 || 2–7(36–28) |- style="background:#bfb" | 65 || August 21 || Astros || 5–4 || Sparky Lyle (6–2) || Vern Ruhle (1–3) || Tug McGraw (8) || 31,693 || 3–7(37–28) |- style="background:#bfb" | 66 || August 22 || Astros || 8–4 || Dick Ruthven (9–5) || Joe Niekro (7–7) || None || 35,199 || 4–7(38–28) |- style="background:#bfb" | 67 || August 23 || Astros || 6–0 || Steve Carlton (10–3) || Bob Knepper (6–3) || None || 30,630 || 5–7(39–28) |- style="background:#bfb" | 68 || August 24 || Braves || 7–5 (13) || Tug McGraw (2–4) || Al Hrabosky (0–1) || None || 23,383 || 6–7(40–28) |- style="background:#fbb" | 69 || August 25 || Braves || 2–12 || Phil Niekro (6–4) || Mark Davis (0–1) || None || 33,383 || 6–8(40–29) |- style="background:#fbb" | 70 || August 26 || Braves || 3–5 (10) || Rick Camp (7–1) || Ron Reed (2–1) || None || 28,283 || 6–9(40–30) |- style="background:#fbb" | 71 || August 28 || @ Astros || 2–3 (10) || Dave Smith (2–3) || Sparky Lyle (6–3) || None || 29,482 || 6–10(40–31) |- style="background:#fbb" | 72 || August 29 (1) || @ Astros || 1–6 || Vern Ruhle (2–3) || Mark Davis (0–2) || None || see 2nd game || 6–11(40–32) |- style="background:#fbb" | 73 || August 29 (2) || @ Astros || 1–2 || Billy Smith (1–0) || Dickie Noles (0–1) || Frank LaCorte (4) || 33,327 || 6–12(40–33) |- style="background:#fbb" | 74 || August 30 || @ Astros || 4–5 (10) || Dave Smith (3–3) || Sparky Lyle (6–4) || None || 23,102 || 6–13(40–34) |- style="background:#bfb" | 75 || August 31 || @ Braves || 11–8 || Dick Ruthven (10–5) || Gaylord Perry (6–5) || Ron Reed (6) || 8,207 || 7–13(41–34) |- |- style="background:#bfb" | 76 || September 1 || @ Braves || 3–0 || Steve Carlton (11–3) || Rick Mahler (4–5) || None || 3,374 || 8–13(42–34) |- style="background:#fbb" | 77 || September 2 || @ Braves || 2–3 ||