|| Danny McDevitt (1–2) || Warren Hacker (0–1) || None || 38,453 || 7–10 |- style="background:#bfb" | 18 || May 5 || @ Dodgers || 8–3 || Ray Semproch (3–1) || Don Drysdale (0–5) || None || 18,075 || 8–10 |- style="background:#fbb" | 19 || May 6 || @ Dodgers || 6–7 (14) || Don Drysdale (1–5) || Turk Farrell (0–1) || None || 15,799 || 8–11 |- style="background:#bfb" | 20 || May 7 || @ Dodgers || 9–3 || Curt Simmons (3–2) || Fred Kipp (1–2) || None || 8,192 || 9–11 |- style="background:#fbb" | 21 || May 9 || @ Pirates || 0–1 (12) || Ron Kline (3–2) || Robin Roberts (1–4) || None || 21,304 || 9–12 |- style="background:#fbb" | 22 || May 10 || @ Pirates || 4–14 || Vern Law (4–1) || Ray Semproch (3–2) || None || 11,807 || 9–13 |- style="background:#fbb" | 23 || May 11 (1) || @ Pirates || 4–10 || Bob Friend (5–1) || Jack Sanford (2–3) || None || see 2nd game || 9–14 |- style="background:#fbb" | 24 || May 11 (2) || @ Pirates || 0–1 (11) || Bob Porterfield (1–0) || Curt Simmons (3–3) || None || 20,544 || 9–15 |- style="background:#bfb" | 25 || May 13 || Braves || 5–2 || Robin Roberts (2–4) || Bob Buhl (4–2) || None || 13,906 || 10–15 |- style="background:#fbb" | 26 || May 14 || Braves || 1–4 || Warren Spahn (6–0) || Ray Semproch (3–3) || None || 13,803 || 10–16 |- style="background:#bbb" | – || May 15 || Braves || colspan=6 | Postponed (rain); Makeup: August 10 as a traditional double-header |- style="background:#bfb" | 27 || May 16 || Pirates || 6–2 || Curt Simmons (4–3) || Bob Porterfield (1–1) || None || 12,401 || 11–16 |- style="background:#bfb" | 28 || May 17 || Pirates || 4–3 || Robin Roberts (3–4) || Bennie Daniels (0–2) || None || 6,262 || 12–16 |- style="background:#bfb" | 29 || May 18 (1) || Pirates || 6–4 || Jack Sanford (3–3) || Ron Kline (4–3) || Turk Farrell (3) || see 2nd game || 13–16 |- style="background:#bfb" | 30 || May 18 (2) || Pirates || 6–2 || Ray Semproch (4–3) || Vern Law (5–2) || None || 19,068 || 14–16 |- style="background:#fbb" | 31 || May 20 || Cardinals || 0–5 || Lindy McDaniel (3–3) || Curt Simmons (4–4) ||