|| 8,672 || 73–77 |- style="background:#bfb" | 151 || September 20 || @ Expos || 10–2 || Steve Carlton (15–12) || Steve Renko (11–15) || None || 8,166 || 74–77 |- style="background:#bbb" | – || September 21 || @ Expos || colspan=6 | Postponed (rain); Makeup: September 22 as a traditional double-header |- style="background:#bfb" | 152 || September 22 (1) || @ Expos || 3–2 || Jim Lonborg (16–12) || Steve Rogers (14–21) || Gene Garber (3) || see 2nd game || 75–77 |- style="background:#fbb" | 153 || September 22 (2) || @ Expos || 5–8 || Mike Torrez (14–8) || Dick Ruthven (9–13) || Dale Murray (7) || 11,183 || 75–78 |- style="background:#bfb" | 154 || September 24 || Mets || 6–3 || Steve Carlton (16–12) || Hank Webb (0–2) || Gene Garber (4) || 11,165 || 76–78 |- style="background:#bfb" | 155 || September 25 (1) || Mets || 6–2 || Ron Schueler (11–15) || Tom Seaver (11–10) || Larry Christenson (2) || see 2nd game || 77–78 |- style="background:#bfb" | 156 || September 25 (2) || Mets || 6–3 || Tom Underwood (1–0) || Randy Sterling (1–1) || Gene Garber (5) || 16,221 || 78–78 |- style="background:#fbb" | 157 || September 27 || @ Expos || 0–2 || Mike Torrez (15–8) || Jim Lonborg (16–13) || None || 8,179 || 78–79 |- style="background:#fbb" | 158 || September 28 || @ Expos || 1–3 || Steve Renko (12–16) || Steve Carlton (16–13) || None || 6,499 || 78–80 |- style="background:#fbb" | 159 || September 29 || @ Expos || 3–6 || Dennis Blair (11–7) || Ron Schueler (11–16) || Dale Murray (10) || 23,326 || 78–81 |- style="background:#fbb" | 160 || September 30 || @ Mets || 2–5 || Jerry Koosman (15–11) || Larry Christenson (1–1) || None || 5,931 || 78–82 |- |- style="background:#bfb" | 161 || October 1 || @ Mets || 2–1 || Jim Lonborg (17–13) || Tom Seaver (11–11) || None || 5,341 || 79–82 |- style="background:#bfb" | 162 || October 2 || @ Mets || 3–2 (10) || Gene Garber' (5–2) || Jon Matlack (13–15) || None || 5,383 || 80–82 |- Roster Player stats Batting Starters by position Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in Other batters Note: G = Games played;