Bob Friend (14–11) || None || 7,881 || 66–58 |- style="background:#bfb" | 125 || August 18 || @ Pirates || 3–1 || Johnny Klippstein (5–5) || Don Schwall (6–8) || None || 10,696 || 67–58 |- style="background:#bfb" | 126 || August 19 || Mets || 1–0 || Dennis Bennett (6–2) || Galen Cisco (7–13) || None || 7,980 || 68–58 |- style="background:#fbb" | 127 || August 20 (1) || Mets || 0–4 || Grover Powell (1–0) || Cal McLish (12–9) || None || see 2nd game || 68–59 |- style="background:#bfb" | 128 || August 20 (2) || Mets || 2–1 (12) || Ryne Duren (6–2) || Larry Bearnarth (2–5) || None || 24,923 || 69–59 |- style="background:#bbb" | – || August 21 || Mets || colspan=6 | Postponed (rain); Makeup: September 9 |- style="background:#bfb" | 129 || August 23 || Pirates || 4–2 || Dennis Bennett (7–2) || Don Schwall (6–9) || Jack Baldschun (15) || 18,126 || 70–59 |- style="background:#fbb" | 130 || August 24 || Pirates || 0–7 || Don Cardwell (12–12) || Chris Short (5–10) || None || 18,276 || 70–60 |- style="background:#bfb" | 131 || August 25 || Pirates || 4–2 (11) || Jack Baldschun (10–5) || Roy Face (3–7) || None || 10,183 || 71–60 |- style="background:#fbb" | 132 || August 27 || @ Cubs || 3–4 || Lindy McDaniel (9–6) || Jack Baldschun (10–6) || None || 11,785 || 71–61 |- style="background:#bfb" | 133 || August 28 || @ Cubs || 8–7 || Dallas Green (5–3) || Paul Toth (5–9) || Ryne Duren (1) || 6,113 || 72–61 |- style="background:#fbb" | 134 || August 29 || @ Cubs || 1–2 || Dick Ellsworth (19–7) || John Boozer (2–3) || None || 10,954 || 72–62 |- style="background:#fbb" | 135 || August 30 || Cardinals || 6–11 || Ray Sadecki (8–8) || Ray Culp (11–11) || Ron Taylor (8) || 26,988 || 72–63 |- style="background:#fbb" | 136 || August 31 || Cardinals || 5–7 (11) || Bobby Shantz (5–3) || Johnny Klippstein (5–6) || None || 11,382 || 72–64 |- |- style="background:#fbb" | 137 || September 1 || Cardinals || 3–7 || Curt Simmons (12–7) || Chris Short (5–11) || None || 17,575 || 72–65 |- style="background:#bfb" | 138 || September 2 || @ Braves || 9–4 || Cal McLish (13–9) || Tony Cloninger (9–9) || None || 13,654 || 73–65 |- style="background:#bfb" | 139 ||