July 18 as a traditional double-header |- style="background:#bbb" | – || May 7 || Dodgers || colspan=6 | Postponed (rain); Makeup: September 15 as a traditional double-header |- style="background:#bbb" | – || May 8 || Braves || colspan=6 | Postponed (rain); Makeup: May 10 as a traditional double-header |- style="background:#bfb" | 21 || May 9 || Braves || 3–2 || Chris Short (3–2) || Clay Carroll (2–4) || Dick Hall (2) || 3,770 || 11–10 |- style="background:#bfb" | 22 || May 10 (1) || Braves || 4–3 || Turk Farrell (2–0) || Phil Niekro (0–1) || None || see 2nd game || 12–10 |- style="background:#fbb" | 23 || May 10 (2) || Braves || 2–7 || Wade Blasingame (1–0) || Larry Jackson (2–2) || Phil Niekro (6) || 9,252 || 12–11 |- style="background:#fbb" | 24 || May 12 || @ Reds || 2–4 || Sammy Ellis (3–2) || Dick Ellsworth (1–2) || None || 10,460 || 12–12 |- style="background:#bfb" | 25 || May 13 || @ Reds || 3–2 || Turk Farrell (3–0) || Billy McCool (3–2) || None || 16,076 || 13–12 |- style="background:#fbb" | 26 || May 14 (1) || @ Reds || 1–2 || Jim Maloney (2–2) || Larry Jackson (2–3) || Ted Abernathy (11) || see 2nd game || 13–13 |- style="background:#fbb" | 27 || May 14 (2) || @ Reds || 0–1 || Gary Nolan (3–1) || Jim Bunning (2–4) || None || 12,381 || 13–14 |- style="background:#fbb" | 28 || May 16 || @ Cardinals || 3–4 || Joe Hoerner (1–1) || Grant Jackson (2–1) || None || 10,514 || 13–15 |- style="background:#fbb" | 29 || May 17 || @ Cardinals || 2–3 || Dick Hughes (1–1) || Turk Farrell (3–1) || None || 15,923 || 13–16 |- style="background:#bfb" | 30 || May 18 || Reds || 7–1 || Jim Bunning (3–4) || Billy McCool (3–3) || None || 8,045 || 14–16 |- style="background:#fbb" | 31 || May 19 || Reds || 1–6 || Jim Maloney (3–2) || Larry Jackson (2–4) || None || 12,204 || 14–17 |- style="background:#fbb" | 32 || May 20 || Reds || 2–5 || Gerry Arrigo (4–0) || Grant Jackson (2–2) || None || 6,299 || 14–18 |- style="background:#bfb" | 33 || May 21 || Reds || 2–1 (18) || Dick Hall (1–2) || Darrell Osteen (0–1) || None || 8,641 || 15–18 |- style="background:#fbb" | 34 || May