|| 4–6 || Nelson Briles (3–1) || Steve Carlton (5–5) || None || 25,164 || 15–20 |- style="background:#bfb" | 36 || May 27 || @ Pirates || 2–1 (12) || Bucky Brandon (2–1) || Dave Giusti (1–4) || Chris Short (1) || 19,398 || 16–20 |- style="background:#fbb" | 37 || May 28 || @ Pirates || 5–6 || Ramón Hernández (2–0) || Joe Hoerner (0–2) || None || 15,236 || 16–21 |- style="background:#fbb" | 38 || May 29 (1) || @ Pirates || 3–7 || Ramón Hernández (3–0) || Woodie Fryman (2–4) || None || see 2nd game || 16–22 |- style="background:#fbb" | 39 || May 29 (2) || @ Pirates || 2–4 || Bob Moose (3–2) || Ken Reynolds (0–1) || Dave Giusti (3) || 36,464 || 16–23 |- style="background:#fbb" | 40 || May 30 || @ Mets || 0–7 || Jon Matlack (6–0) || Steve Carlton (5–6) || None || 17,598 || 16–24 |- style="background:#bbb" | – || May 31 || @ Mets || colspan=6 | Postponed (rain); Makeup: August 1 as a traditional double-header |- |- style="background:#fbb" | 41 || June 1 || @ Mets || 1–6 || Jim McAndrew (4–1) || Dick Selma (1–6) || None || 16,850 || 16–25 |- style="background:#fbb" | 42 || June 2 || Reds || 3–6 (17) || Don Gullett (2–2) || Wayne Twitchell (2–1) || Pedro Borbón (4) || 16,251 || 16–26 |- style="background:#fbb" | 43 || June 3 || Reds || 5–6 (10) || Tom Hall (3–1) || Ken Reynolds (0–2) || None || 16,623 || 16–27 |- style="background:#fbb" | 44 || June 4 || Reds || 0–2 || Jack Billingham (3–6) || Bill Champion (3–3) || Clay Carroll (10) || 15,861 || 16–28 |- style="background:#fbb" | 45 || June 6 || Astros || 3–4 || Dave Roberts (4–3) || Woodie Fryman (2–5) || Fred Gladding (5) || 8,237 || 16–29 |- style="background:#bfb" | 46 || June 7 || Astros || 3–1 || Steve Carlton (6–6) || Jerry Reuss (3–5) || Bucky Brandon (1) || 10,712 || 17–29 |- style="background:#bfb" | 47 || June 8 || Astros || 7–2 || Bill Champion (4–3) || Larry Dierker (5–3) || Joe Hoerner (2) || 20,155 || 18–29 |- style="background:#bfb" | 48 || June 9 || Braves || 4–3 || Chris Short (1–1) || George Stone (0–4) || Joe Hoerner (3) || 17,082 || 19–29 |- style="background:#fbb" | 49 || June 10