(2) || @ Pirates || 2–6 || Bob Smith (1–3) || Warren Hacker (7–6) || None || 12,021 || 70–69–2 |- style="background:#fbb" | 142 || September 10 || @ Cardinals || 3–4 (14) || Lindy McDaniel (14–8) || Robin Roberts (9–20) || None || 10,997 || 70–70–2 |- style="background:#fbb" | 143 || September 11 || @ Cardinals || 6–14 || Herm Wehmeier (9–6) || Harvey Haddix (10–12) || Hoyt Wilhelm (11) || 10,674 || 70–71–2 |- style="background:#fbb" | 144 || September 13 || @ Redlegs || 7–8 || Tom Acker (10–5) || Jack Sanford (17–7) || Johnny Klippstein (3) || 6,805 || 70–72–2 |- style="background:#bfb" | 145 || September 14 || @ Redlegs || 5–0 || Robin Roberts (10–20) || Brooks Lawrence (15–12) || None || 4,527 || 71–72–2 |- style="background:#bfb" | 146 || September 15 || @ Braves || 3–2 (10) || Turk Farrell (9–2) || Warren Spahn (19–10) || None || 34,920 || 72–72–2 |- style="background:#fbb" | 147 || September 16 || @ Braves || 1–5 || Bob Buhl (17–6) || Harvey Haddix (10–13) || None || 20,929 || 72–73–2 |- style="background:#fbb" | 148 || September 17 || @ Cubs || 1–7 || Moe Drabowsky (11–14) || Jack Sanford (17–8) || None || 1,727 || 72–74–2 |- style="background:#fbb" | 149 || September 18 || @ Cubs || 4–6 || Dick Drott (15–11) || Robin Roberts (10–21) || Don Elston (6) || 2,094 || 72–75–2 |- style="background:#bfb" | 150 || September 20 || @ Dodgers || 3–2 || Turk Farrell (10–2) || Carl Erskine (5–3) || Jim Hearn (3) || 6,749 || 73–75–2 |- style="background:#bfb" | 151 || September 21 || @ Dodgers || 3–2 || Jack Sanford (18–8) || Johnny Podres (12–9) || Turk Farrell (10) || 5,118 || 74–75–2 |- style="background:#fbb" | 152 || September 22 || @ Dodgers || 3–7 || Don Drysdale (17–9) || Robin Roberts (10–22) || None || 6,662 || 74–76–2 |- style="background:#bfb" | 153 || September 24 || Giants || 5–0 || Curt Simmons (12–11) || Curt Barclay (9–9) || None || 7,019 || 75–76–2 |- style="background:#bfb" | 154 || September 27 || Dodgers || 3–2 || Jack Sanford (19–8) || Bill Harris (0–1) || None || 11,595 || 76–76–2 |- style="background:#fbb" | 155 || September 28 || Dodgers || 4–8 || Ed Roebuck (8–2) || Don Cardwell (4–8) || Johnny Podres (3) || 5,797 || 76–77–2 |- style="background:#bfb" | 156 ||