6–7 (12) || Tom House (6–2) || Mac Scarce (3–8) || None || 45,805 || 61–59 |- style="background:#bfb" | 121 || August 18 || @ Braves || 7–4 || Dick Ruthven (6–9) || Ron Reed (8–7) || None || 11,407 || 62–59 |- style="background:#fbb" | 122 || August 19 || @ Reds || 2–15 || Don Gullett (14–8) || Wayne Twitchell (6–5) || None || 21,806 || 62–60 |- style="background:#fbb" | 123 || August 20 || @ Reds || 1–7 || Clay Kirby (8–7) || Ron Schueler (7–12) || None || 30,448 || 62–61 |- style="background:#bfb" | 124 || August 21 || @ Reds || 10–3 || Jim Lonborg (14–11) || Tom Carroll (4–1) || None || 31,887 || 63–61 |- style="background:#fbb" | 125 || August 23 || @ Astros || 0–1 || Larry Dierker (8–8) || Dick Ruthven (6–10) || None || 12,175 || 63–62 |- style="background:#fbb" | 126 || August 24 || @ Astros || 0–1 || Dave Roberts (9–10) || Steve Carlton (14–9) || None || 12,215 || 63–63 |- style="background:#fbb" | 127 || August 25 || @ Astros || 0–5 || Don Wilson (9–10) || Wayne Twitchell (6–6) || None || 11,405 || 63–64 |- style="background:#bfb" | 128 || August 26 || Reds || 7–6 || Ron Schueler (8–12) || Clay Carroll (10–4) || None || 27,197 || 64–64 |- style="background:#fbb" | 129 || August 27 || Reds || 0–3 || Jack Billingham (16–8) || Dick Ruthven (6–11) || None || 32,106 || 64–65 |- style="background:#fbb" | 130 || August 28 || Reds || 3–4 || Will McEnaney (2–1) || Ron Schueler (8–13) || Dick Baney (1) || 31,535 || 64–66 |- style="background:#fbb" | 131 || August 30 || Astros || 2–3 || Don Wilson (10–10) || Wayne Twitchell (6–7) || Ken Forsch (6) || 17,106 || 64–67 |- style="background:#bfb" | 132 || August 31 || Astros || 10–6 || Larry Christenson (1–0) || J. R. Richard (1–1) || None || 35,257 || 65–67 |- |- style="background:#bfb" | 133 || September 1 || Astros || 8–1 || Dick Ruthven (7–11) || Tom Griffin (12–8) || None || 18,232 || 66–67 |- style="background:#fbb" | 134 || September 2 (1) || @ Pirates || 4–7 || Jerry Reuss (15–9) || Steve Carlton (14–10) || None || see 2nd game || 66–68 |- style="background:#fbb" | 135 || September 2 (2) || @ Pirates || 1–11 || Bruce Kison (7–7)