|| 1–8 || Doug Rau (11–9) || Tom Underwood (12–9) || None || 20,273 || 70–60 |- style="background:#fbb" | 131 || August 27 || @ Dodgers || 0–10 || Burt Hooton (13–9) || Steve Carlton (11–11) || None || 20,753 || 70–61 |- style="background:#bfb" | 132 || August 28 || @ Giants || 8–5 || Tom Hilgendorf (6–3) || Jim Barr (11–12) || None || 4,190 || 71–61 |- style="background:#bfb" | 133 || August 29 || @ Giants || 3–1 || Larry Christenson (9–4) || Ed Halicki (8–11) || Tug McGraw (12) || 5,007 || 72–61 |- style="background:#fbb" | 134 || August 30 || @ Giants || 1–4 || Pete Falcone (10–9) || Tom Underwood (12–10) || None || 5,663 || 72–62 |- style="background:#fbb" | 135 || August 31 || @ Giants || 4–5 || John Montefusco (12–7) || Steve Carlton (11–12) || Charlie Williams (3) || 8,884 || 72–63 |- |- style="background:#fbb" | 136 || September 1 || Expos || 5–6 || Dale Murray (10–7) || Gene Garber (9–9) || None || 12,925 || 72–64 |- style="background:#fbb" | 137 || September 2 || Expos || 3–4 || Dennis Blair (8–14) || Larry Christenson (9–5) || Dale Murray (9) || 15,232 || 72–65 |- style="background:#bfb" | 138 || September 3 || Expos || 6–3 || Tom Underwood (13–10) || Don Carrithers (2–2) || Gene Garber (12) || 15,597 || 73–65 |- style="background:#fbb" | 139 || September 5 (1) || Cubs || 3–4 || Bill Bonham (12–13) || Steve Carlton (11–13) || Paul Reuschel (4) || see 2nd game || 73–66 |- style="background:#bfb" | 140 || September 5 (2) || Cubs || 6–3 || Tug McGraw (8–5) || Paul Reuschel (1–2) || None || 32,041 || 74–66 |- style="background:#fbb" | 141 || September 6 || Cubs || 6–7 || Steve Stone (12–7) || Gene Garber (9–10) || Darold Knowles (12) || 26,554 || 74–67 |- style="background:#fbb" | 142 || September 7 || Cubs || 4–6 || Ray Burris (13–10) || Wayne Twitchell (5–10) || Rick Reuschel (1) || 30,071 || 74–68 |- style="background:#bfb" | 143 || September 8 || Cardinals || 6–3 || Tom Underwood (14–10) || Ron Reed (12–10) || Tug McGraw (13) || 22,768 || 75–68 |- style="background:#bfb" | 144 || September 9 || Cardinals || 6–2 || Steve Carlton (12–13) || John Denny (9–5) || None || 13,764 || 76–68 |- style="background:#bfb" | 145 || September 10 ||