style="background:#fbb" | 36 || May 28 || @ Reds || 2–4 || Bob Purkey (5–2) || Frank Sullivan (2–5) || None || 6,632 || 11–25 |- style="background:#fbb" | 37 || May 30 (1) || Braves || 1–3 || Bob Buhl (2–4) || Don Ferrarese (0–2) || None || see 2nd game || 11–26 |- style="background:#bfb" | 38 || May 30 (2) || Braves || 11–4 || Art Mahaffey (6–3) || Carl Willey (2–1) || None || 28,783 || 12–26 |- style="background:#fbb" | 39 || May 31 || Cubs || 4–5 || Bob Anderson (2–3) || Robin Roberts (0–7) || Don Elston (5) || 4,213 || 12–27 |- |- style="background:#fbb" | 40 || June 1 || Cubs || 3–10 || Glen Hobbie (3–5) || Frank Sullivan (2–6) || None || 3,785 || 12–28 |- style="background:#bfb" | 41 || June 2 || @ Pirates || 6–0 || John Buzhardt (1–5) || Bob Friend (5–7) || None || 14,344 || 13–28 |- style="background:#fbb" | 42 || June 3 || @ Pirates || 1–5 || Bobby Shantz (2–1) || Art Mahaffey (6–4) || Roy Face (7) || 11,153 || 13–29 |- style="background:#bfb" | 43 || June 4 || @ Pirates || 5–0 || Don Ferrarese (1–2) || Vinegar Bend Mizell (4–3) || None || 27,352 || 14–29 |- style="background:#bfb" | 44 || June 5 || @ Giants || 3–2 || Robin Roberts (1–7) || Mike McCormick (5–5) || None || 4,881 || 15–29 |- style="background:#bfb" | 45 || June 6 || @ Giants || 13–9 || Dallas Green (2–3) || Billy O'Dell (1–3) || Ken Lehman (1) || 10,533 || 16–29 |- style="background:#fbb" | 46 || June 7 || @ Giants || 3–4 (11) || Stu Miller (5–0) || Chris Short (1–2) || None || 6,048 || 16–30 |- style="background:#bfb" | 47 || June 8 || @ Giants || 5–2 || John Buzhardt (2–5) || Sam Jones (5–5) || None || 5,703 || 17–30 |- style="background:#fbb" | 48 || June 9 || @ Dodgers || 1–3 || Don Drysdale (4–3) || Frank Sullivan (2–7) || None || 19,110 || 17–31 |- style="background:#fbb" | 49 || June 10 || @ Dodgers || 4–5 || Larry Sherry (2–2) || John Buzhardt (2–6) || None || 18,908 || 17–32 |- style="background:#fbb" | 50 || June 11 || @ Dodgers || 3–6 || Sandy Koufax (9–2) || Art Mahaffey (6–5) || None || 18,833 || 17–33 |- style="background:#bfb"