|| 44–76 |- style="background:#fbb" | 121 || August 29 || @ Astros || 1–2 || Fred Gladding (5–5) || Mac Scarce (1–2) || None || 8,704 || 44–77 |- style="background:#fbb" | 122 || August 30 || @ Astros || 3–5 || Jerry Reuss (9–10) || Steve Carlton (21–8) || Jim Ray (8) || 10,264 || 44–78 |- style="background:#fbb" | 123 || August 31 || @ Astros || 1–5 || Larry Dierker (14–7) || Wayne Twitchell (3–7) || None || 7,197 || 44–79 |- |- style="background:#bfb" | 124 || September 1 (1) || @ Braves || 11–1 || Ken Reynolds (1–12) || Ron Reed (11–13) || None || see 2nd game || 45–79 |- style="background:#fbb" | 125 || September 1 (2) || @ Braves || 5–11 || Jimmy Freeman (1–0) || Barry Lersch (2–5) || None || 3,333 || 45–80 |- style="background:#fbb" | 126 || September 2 (1) || @ Braves || 7–10 || Pat Jarvis (10–7) || Dick Selma (2–9) || Cecil Upshaw (10) || see 2nd game || 45–81 |- style="background:#bfb" | 127 || September 2 (2) || @ Braves || 3–0 || Dave Downs (1–0) || Mike McQueen (0–2) || None || 5,239 || 46–81 |- style="background:#bfb" | 128 || September 3 || @ Braves || 8–0 || Steve Carlton (22–8) || Jim Hardin (3–2) || None || 5,119 || 47–81 |- style="background:#fbb" | 129 || September 4 (1) || @ Pirates || 0–10 || Steve Blass (16–6) || Wayne Twitchell (3–8) || None || see 2nd game || 47–82 |- style="background:#fbb" | 130 || September 4 (2) || @ Pirates || 1–5 || Bruce Kison (8–5) || Jim Nash (1–6) || None || 26,627 || 47–83 |- style="background:#bfb" | 131 || September 6 || Cardinals || 3–2 || Ken Reynolds (2–12) || Lowell Palmer (0–2) || None || 6,137 || 48–83 |- style="background:#bfb" | 132 || September 7 || Cardinals || 2–1 || Steve Carlton (23–8) || Al Santorini (6–10) || None || 12,151 || 49–83 |- style="background:#fbb" | 133 || September 8 || Cubs || 3–4 || Ferguson Jenkins (20–10) || Bucky Brandon (5–6) || None || 7,648 || 49–84 |- style="background:#fbb" | 134 || September 9 || Cubs || 4–7 || Rick Reuschel (8–7) || Barry Lersch (2–6) || Bill Bonham (2) || 10,101 || 49–85 |- style="background:#fbb" | 135 || September 10 || Cubs || 3–5 || Milt Pappas (13–7) || Jim Nash (1–7)