20 |- style="background:#bfb" | 140 || September 10 || Cardinals || 5–4 (12) || Ferguson Jenkins (1–0) || Hal Woodeshick (6–6) || None || 16,333 || 72–68 |- style="background:#bfb" | 141 || September 11 || Cardinals || 3–1 || Chris Short (17–9) || Tracy Stallard (10–7) || None || 13,558 || 73–68 |- style="background:#bbb" | – || September 12 || Cardinals || colspan=6 | Cancelled (rain; Hurricane Betsy); Was not rescheduled |- style="background:#bfb" | 142 || September 13 || Braves || 4–3 || Ray Culp (11–9) || Phil Niekro (1–3) || None || 5,647 || 74–68 |- style="background:#bfb" | 143 || September 14 || Braves || 2–0 || Jim Bunning (17–8) || Hank Fischer (7–7) || None || 11,050 || 75–68 |- style="background:#fbb" | 144 || September 15 || Braves || 2–4 || Tony Cloninger (22–9) || Chris Short (17–10) || Dan Osinski (5) || 10,932 || 75–69 |- style="background:#bfb" | 145 || September 16 || Braves || 8–6 || Gary Wagner (6–7) || Denny Lemaster (6–12) || Ferguson Jenkins (1) || 11,336 || 76–69 |- style="background:#fbb" | 146 || September 17 || @ Pirates || 0–4 || Don Cardwell (12–10) || Ray Culp (11–10) || None || 8,987 || 76–70 |- style="background:#fbb" | 147 || September 18 || @ Pirates || 3–4 || Roy Face (2–1) || Morrie Steevens (0–1) || None || 5,313 || 76–71 |- style="background:#fbb" | 148 || September 19 || @ Pirates || 0–1 (10) || Bob Veale (17–11) || Jack Baldschun (5–8) || None || 10,026 || 76–72 |- style="background:#bfb" | 149 || September 20 || @ Braves || 4–1 || Ray Culp (12–10) || Wade Blasingame (16–10) || None || 812 || 77–72 |- style="background:#fbb" | 150 || September 21 || @ Cubs || 5–7 || Ted Abernathy (4–4) || Ferguson Jenkins (1–1) || None || 892 || 77–73 |- style="background:#bbb" | – || September 22 || @ Cubs || colspan=6 | Postponed (rain); Makeup: September 23 as a traditional double-header |- style="background:#bfb" | 151 || September 23 (1) || @ Cubs || 11–5 || Jim Bunning (18–8) || Larry Jackson (13–20) || None || see 2nd game || 78–73 |- style="background:#bfb" | 152 || September 23 (2) || @ Cubs || 7–4 || Chris Short (18–10) || Bill Faul (5–6) || None || 1,598 || 79–73 |- style="background:#bbb" | – || September 24 || Mets || colspan=6 | Postponed (rain); Makeup: September