Welch (4–2) || None || 25,977 || 15–15 |- style="background:#bfb" | 31 || May 13 || Giants || 8–1 || Dick Ruthven (2–3) || Alan Fowlkes (3–2) || None || 23,053 || 16–15 |- style="background:#bfb" | 32 || May 14 || Giants || 2–0 || Steve Carlton (4–5) || Rich Gale (1–3) || None || 33,541 || 17–15 |- style="background:#bfb" | 33 || May 15 || Giants || 5–3 || Larry Christenson (3–3) || Greg Minton (2–3) || Sparky Lyle (1) || 29,785 || 18–15 |- style="background:#bfb" | 34 || May 16 || Giants || 6–1 || Mike Krukow (3–2) || Atlee Hammaker (2–1) || None || 38,125 || 19–15 |- style="background:#fbb" | 35 || May 17 || Astros || 1–8 || Vern Ruhle (2–2) || Ron Reed (1–1) || None || 23,734 || 19–16 |- style="background:#fbb" | 36 || May 18 || Astros || 1–2 (12) || Dave Smith (1–2) || Ed Farmer (1–2) || None || 23,869 || 19–17 |- style="background:#fbb" | 37 || May 19 || Astros || 3–5 || Bob Knepper (2–4) || Steve Carlton (4–6) || Dave Smith (6) || 20,007 || 19–18 |- style="background:#fbb" | 38 || May 21 || @ Braves || 6–7 || Steve Bedrosian (3–0) || Sparky Lyle (1–1) || None || 28,050 || 19–19 |- style="background:#bfb" | 39 || May 22 || @ Braves || 5–2 || Mike Krukow (4–2) || Larry McWilliams (2–2) || Ed Farmer (4) || 25,925 || 20–19 |- style="background:#bfb" | 40 || May 23 || @ Braves || 2–1 || Dick Ruthven (3–3) || Phil Niekro (2–1) || Ed Farmer (5) || 27,965 || 21–19 |- style="background:#bfb" | 41 || May 24 || @ Reds || 9–1 || Steve Carlton (5–6) || Tom Seaver (1–6) || None || 17,110 || 22–19 |- style="background:#fbb" | 42 || May 25 || @ Reds || 3–4 || Greg A. Harris (1–0) || Ed Farmer (1–3) || Tom Hume (9) || 16,688 || 22–20 |- style="background:#fbb" | 43 || May 26 || @ Reds || 0–2 || Mario Soto (4–4) || Mike Krukow (4–3) || None || 14,091 || 22–21 |- style="background:#bbb" | – || May 28 || Braves || colspan=6 | Postponed (rain); Makeup: August 30 as a traditional double-header |- style="background:#bfb" | 44 || May 29 || Braves || 1–0 || Dick Ruthven (4–3) || Phil Niekro (2–2) || None || 26,790 || 23–21 |- style="background:#bfb" |