Cubs || 12–0 || Chris Short (2–1) || Ken Holtzman (1–1) || None || 4,495 || 8–5 |- |- style="background:#fbb" | 14 || May 1 || @ Cubs || 1–6 || Bill Faul (1–0) || Larry Jackson (0–3) || None || 7,783 || 8–6 |- style="background:#fbb" | 15 || May 3 || @ Braves || 8–9 (10) || Phil Niekro (2–1) || Ray Herbert (0–1) || None || 10,485 || 8–7 |- style="background:#bfb" | 16 || May 4 || @ Braves || 2–1 || Chris Short (3–1) || Ken Johnson (2–2) || None || 11,588 || 9–7 |- style="background:#fbb" | 17 || May 5 || @ Braves || 3–4 || Chi-Chi Olivo (1–0) || Gary Wagner (0–1) || Billy O'Dell (4) || 11,236 || 9–8 |- style="background:#bfb" | 18 || May 6 || Pirates || 8–7 (11) || Darold Knowles (3–0) || Roy Face (3–1) || None || 18,982 || 10–8 |- style="background:#bfb" | 19 || May 7 || Pirates || 7–3 || Jim Bunning (3–1) || Tommie Sisk (1–1) || None || 7,006 || 11–8 |- style="background:#fbb" | 20 || May 8 || Pirates || 2–3 || Bob Veale (3–1) || Ray Herbert (0–2) || None || 8,411 || 11–9 |- style="background:#bbb" | – || May 9 || Dodgers || colspan=6 | Postponed (cold weather); Makeup: July 17 as a traditional double-header |- style="background:#fbb" | 21 || May 10 || Dodgers || 1–6 || Sandy Koufax (4–1) || Chris Short (3–2) || None || 14,895 || 11–10 |- style="background:#fbb" | 22 || May 11 || Dodgers || 0–5 || Don Sutton (4–3) || Larry Jackson (0–4) || None || 11,756 || 11–11 |- style="background:#bfb" | 23 || May 12 || Dodgers || 5–1 || Jim Bunning (4–1) || Don Drysdale (2–4) || Darold Knowles (1) || 10,205 || 12–11 |- style="background:#fbb" | 24 || May 13 || Astros || 0–1 || Turk Farrell (1–1) || Chris Short (3–3) || Claude Raymond (3) || 10,559 || 12–12 |- style="background:#fbb" | 25 || May 14 || Astros || 5–6 (11) || Don Lee (1–0) || Terry Fox (0–2) || Claude Raymond (4) || 3,957 || 12–13 |- style="background:#bfb" | 26 || May 15 || Astros || 5–2 || Larry Jackson (1–4) || Barry Latman (2–3) || Jim Bunning (1) || 9,208 || 13–13 |- style="background:#bfb" | 27 || May 17 || Cardinals || 5–3 || Chris Short (4–3) || Nelson Briles