|| Sid Monge (7–1) || Don Robinson (15–11) || Ron Reed (12) || 31,468 || 81–66 |- style="background:#fbb" | 148 || September 19 || Pirates || 1–8 || Manny Sarmiento (8–3) || Mike Krukow (12–11) || None || 37,352 || 81–67 |- style="background:#fbb" | 149 || September 20 || @ Cardinals || 1–4 || Joaquín Andújar (14–10) || John Denny (6–13) || Bruce Sutter (34) || 35,899 || 81–68 |- style="background:#bfb" | 150 || September 21 || @ Cardinals || 5–2 || Steve Carlton (21–10) || Eric Rasmussen (0–1) || None || 38,942 || 82–68 |- style="background:#fbb" | 151 || September 22 || @ Expos || 4–11 || Bill Gullickson (12–12) || Dick Ruthven (11–11) || None || 18,123 || 82–69 |- style="background:#bfb" | 152 || September 23 || @ Expos || 2–0 (11) || Ron Reed (5–5) || Steve Rogers (17–8) || Porfi Altamirano (2) || 14,762 || 83–69 |- style="background:#bfb" | 153 || September 24 || @ Mets || 2–1 || Mike Krukow (13–11) || Walt Terrell (0–2) || Ron Reed (13) || 7,661 || 84–69 |- style="background:#fbb" | 154 || September 25 || @ Mets || 1–2 || Craig Swan (11–7) || Steve Carlton (21–11) || None || 8,870 || 84–70 |- style="background:#fbb" | 155 || September 26 || @ Mets || 4–6 || Charlie Puleo (9–9) || Ed Farmer (2–6) || None || 16,384 || 84–71 |- style="background:#fbb" | 156 || September 27 || Cubs || 1–8 || Randy Martz (11–10) || Marty Bystrom (5–6) || None || 15,744 || 84–72 |- style="background:#bfb" | 157 || September 28 || Cubs || 3–2 || Larry Christenson (9–10) || Doug Bird (9–14) || Ron Reed (14) || 14,431 || 85–72 |- style="background:#bfb" | 158 || September 29 || Expos || 4–0 || Steve Carlton (22–11) || Bryn Smith (2–4) || None || 16,024 || 86–72 |- style="background:#bfb" | 159 || September 30 || Expos || 5–4 || Porfi Altamirano (4–0) || Jeff Reardon (7–4) || None || 15,439 || 87–72 |- |- style="background:#fbb" | 160 || October 1 || Mets || 0–1 (10) || Terry Leach (2–1) || Porfi Altamirano (4–1) || None || 16,072 || 87–73 |- style="background:#bfb" | 161 || October 2 || Mets || 4–3 || Porfi Altamirano (5–1) || Pat Zachry (6–9) || None || 32,729 || 88–73 |- style="background:#bfb" | 162 || October 3 || Mets || 4–1 || Steve Carlton (23–11) ||