8–16 |- style="background:#bfb" | 25 || May 18 || Cardinals || 4–2 || Curt Simmons (1–2) || Willard Schmidt (2–1) || None || 16,026 || 9–16 |- style="background:#fbb" | 26 || May 19 || Cardinals || 5–11 || Lindy McDaniel (3–0) || Saul Rogovin (1–2) || None || 7,605 || 9–17 |- style="background:#fbb" | 27 || May 20 (1) || Redlegs || 1–5 || Art Fowler (3–4) || Robin Roberts (4–4) || None || see 2nd game || 9–18 |- style="background:#bfb" | 28 || May 20 (2) || Redlegs || 6–4 || Bob Miller (1–0) || Paul LaPalme (1–1) || Harvey Haddix (1) || 21,677 || 10–18 |- style="background:#bbb" | – || May 22 || Cubs || colspan=6 | Postponed (rain); Makeup: June 15 as a traditional double-header |- style="background:#fbb" | 29 || May 23 || Cubs || 4–5 || Vito Valentinetti (1–1) || Harvey Haddix (1–2) || None || 5,795 || 10–19 |- style="background:#bfb" | 30 || May 24 || Dodgers || 6–4 || Robin Roberts (5–4) || Don Drysdale (1–2) || None || 16,432 || 11–19 |- style="background:#fbb" | 31 || May 25 || Pirates || 5–8 || Nellie King (3–1) || Curt Simmons (1–3) || Red Munger (1) || 10,407 || 11–20 |- style="background:#fbb" | 32 || May 26 || Pirates || 2–6 || Vern Law (2–3) || Stu Miller (1–2) || None || 4,614 || 11–21 |- style="background:#bbb" | – || May 27 (1) || Pirates || colspan=6 | Postponed (rain); Makeup: August 14 as a traditional double-header |- style="background:#bbb" | – || May 27 (2) || Pirates || colspan=6 | Postponed (rain); Makeup: August 16 |- style="background:#bfb" | 33 || May 28 || Giants || 5–2 || Harvey Haddix (2–2) || Al Worthington (1–5) || Robin Roberts (2) || 10,430 || 12–21 |- style="background:#fbb" | 34 || May 30 (1) || Dodgers || 5–6 || Ed Roebuck (1–1) || Robin Roberts (5–5) || Clem Labine (4) || see 2nd game || 12–22 |- style="background:#bfb" | 35 || May 30 (2) || Dodgers || 12–3 || Saul Rogovin (2–2) || Don Drysdale (1–3) || None || 35,942 || 13–22 |- |- style="background:#bfb" | 36 || June 1 || @ Cardinals || 5–2 || Curt Simmons (2–3) || Tom Poholsky (3–3) || Bob Miller (1) || 8,868 || 14–22 |- style="background:#bfb" | 37 || June 2 || @ Cardinals || 6–4 || Stu Miller (2–2) || Herm