|| 10,002 || 14–29 |- style="background:#fbb" | 44 || June 3 || Pirates || 0–3 || Vern Law (8–1) || John Buzhardt (1–4) || None || 16,738 || 14–30 |- style="background:#bbb" | – || June 4 || Pirates || colspan=6 | Postponed (rain); Makeup: September 20 as a traditional double-header |- style="background:#bfb" | 45 || June 5 (1) || Pirates || 2–0 || Gene Conley (3–3) || Bob Friend (6–3) || None || see 2nd game || 15–30 |- style="background:#bfb" | 46 || June 5 (2) || Pirates || 4–1 || Jim Owens (3–5) || Harvey Haddix (3–2) || None || 23,410 || 16–30 |- style="background:#fbb" | 47 || June 6 || @ Cardinals || 2–5 || Larry Jackson (7–5) || Chris Short (2–1) || None || 9,908 || 16–31 |- style="background:#bfb" | 48 || June 7 || @ Cardinals || 5–3 || Robin Roberts (2–7) || Bob Miller (2–1) || Turk Farrell (6) || 9,635 || 17–31 |- style="background:#bfb" | 49 || June 8 || @ Cardinals || 5–4 || John Buzhardt (2–4) || Lindy McDaniel (3–3) || None || 8,263 || 18–31 |- style="background:#fbb" | 50 || June 10 || @ Cubs || 1–6 || Mark Freeman (1–0) || Jim Owens (3–6) || None || 5,077 || 18–32 |- style="background:#bfb" | 51 || June 11 || @ Cubs || 7–1 || Chris Short (3–1) || Dick Ellsworth (3–3) || None || 13,166 || 19–32 |- style="background:#fbb" | 52 || June 12 || @ Cubs || 7–8 (10) || Mark Freeman (2–0) || Humberto Robinson (0–4) || None || 8,481 || 19–33 |- style="background:#bfb" | 53 || June 14 || @ Dodgers || 6–5 (10) || Turk Farrell (3–1) || Clem Labine (0–1) || None || 18,031 || 20–33 |- style="background:#fbb" | 54 || June 15 || @ Dodgers || 2–14 || Sandy Koufax (2–8) || Jim Owens (3–7) || None || 13,295 || 20–34 |- style="background:#fbb" | 55 || June 16 || @ Dodgers || 6–10 || Johnny Podres (6–5) || John Buzhardt (2–5) || Ed Roebuck (2) || 19,573 || 20–35 |- style="background:#fbb" | 56 || June 17 || @ Giants || 3–7 || Mike McCormick (8–3) || Chris Short (3–2) || Billy Loes (3) || 20,952 || 20–36 |- style="background:#fbb" | 57 || June 18 || @ Giants || 4–7 || Sam Jones (9–5) || Dallas Green (0–1) || Johnny Antonelli (2) || 19,494 || 20–37