May 18 || Cubs || colspan=6 | Postponed (rain); Makeup: June 21 as a traditional double-header |- style="background:#fbb" | 31 || May 19 || Cubs || 2–4 || Bob Anderson (1–1) || Robin Roberts (1–4) || None || 12,297 || 11–20 |- style="background:#bfb" | 32 || May 20 || Dodgers || 6–3 || Gene Conley (2–1) || Johnny Podres (2–4) || None || 18,681 || 12–20 |- style="background:#bbb" | – || May 21 || Dodgers || colspan=6 | Postponed (rain); Makeup: June 29 as a traditional double-header |- style="background:#fbb" | 33 || May 22 || Dodgers || 6–9 || Ed Roebuck (2–1) || Rubén Gómez (0–3) || Don Drysdale (1) || 12,780 || 12–21 |- style="background:#fbb" | 34 || May 24 || Giants || 0–4 || Sam Jones (5–3) || Jim Owens (2–5) || None || 20,529 || 12–22 |- style="background:#fbb" | 35 || May 25 || Giants || 1–5 (8) || Mike McCormick (6–2) || Robin Roberts (1–5) || None || 17,713 || 12–23 |- style="background:#fbb" | 36 || May 26 || Giants || 0–9 || Jack Sanford (5–1) || Gene Conley (2–2) || None || 14,386 || 12–24 |- style="background:#bbb" | – || May 27 || @ Pirates || colspan=6 | Postponed (rain); Makeup: August 16 as a traditional double-header |- style="background:#fbb" | 37 || May 28 || @ Pirates || 2–4 (13) || Jim Umbricht (1–2) || Turk Farrell (2–1) || None || 9,476 || 12–25 |- style="background:#fbb" | 38 || May 29 || @ Pirates || 5–8 || Vern Law (7–1) || Robin Roberts (1–6) || Fred Green (2) || 15,704 || 12–26 |- style="background:#fbb" | 39 || May 30 (1) || Reds || 4–5 (10) || Jim Brosnan (3–0) || Gene Conley (2–3) || Bob Grim (1) || see 2nd game || 12–27 |- style="background:#bfb" | 40 || May 30 (2) || Reds || 6–1 || John Buzhardt (1–3) || Don Newcombe (3–2) || None || 20,323 || 13–27 |- style="background:#bfb" | 41 || May 31 || Braves || 12–7 || Chris Short (2–0) || Lew Burdette (3–2) || Turk Farrell (5) || 8,155 || 14–27 |- |- style="background:#fbb" | 42 || June 1 || Braves || 3–6 || Bob Buhl (4–2) || Robin Roberts (1–7) || None || 10,682 || 14–28 |- style="background:#fbb" | 43 || June 2 || Braves || 8–9 || Warren Spahn (3–2) || Taylor Phillips (0–1) || Bob Rush (1)