– || September 3 || @ Braves || colspan=6 | Postponed (rain); Makeup: September 25 as a traditional double-header |- style="background:#fbb" | 131 || September 4 (1) || Giants || 0–2 || Jim Hearn (8–2) || Robin Roberts (18–7) || None || see 2nd game || 80–48–3 |- style="background:#fbb" | 132 || September 4 (2) || Giants || 0–9 || Sal Maglie (14–3) || Bob Miller (11–4) || None || 33,988 || 80–49–3 |- style="background:#fbb" | 133 || September 6 (1) || Dodgers || 0–2 || Don Newcombe (17–8) || Bubba Church (8–3) || None || see 2nd game || 80–50–3 |- style="background:#fbb" | 134 || September 6 (2) || Dodgers || 2–3 || Dan Bankhead (7–4) || Jim Konstanty (13–5) || None || 32,279 || 80–51–3 |- style="background:#fbb" | 135 || September 7 || Dodgers || 2–3 || Carl Erskine (3–4) || Robin Roberts (18–8) || Ralph Branca (6) || 24,624 || 80–52–3 |- style="background:#bfb" | 136 || September 8 || Dodgers || 4–3 || Russ Meyer (8–11) || Erv Palica (8–7) || None || 14,727 || 81–52–3 |- style="background:#bfb" | 137 || September 9 || Braves || 7–6 || Jim Konstanty (14–5) || Dave Cole (0–1) || None || 15,329 || 82–52–3 |- style="background:#fbb" | 138 || September 10 || Braves || 1–3 (5) || Johnny Sain (18–12) || Bubba Church (8–4) || None || 14,684 || 82–53–3 |- style="background:#bfb" | 139 || September 12 || Cardinals || 1–0 || Robin Roberts (19–8) || Max Lanier (11–7) || None || 20,864 || 83–53–3 |- style="background:#bbb" | – || September 13 || Cardinals || colspan=6 | Postponed (rain); Makeup: September 14 |- style="background:#bfb" | 140 || September 14 || Cardinals || 3–2 || Jim Konstanty (15–5) || Al Brazle (10–7) || None || 17,142 || 84–53–3 |- style="background:#bfb" | 141 || September 15 (1) || Reds || 2–1 || Ken Heintzelman (2–8) || Willie Ramsdell (8–13) || None || see 2nd game || 85–53–3 |- style="background:#bfb" | 142 || September 15 (2) || Reds || 8–7 (19) || Blix Donnelly (1–4) || Eddie Erautt (3–2) || None || 20,673 || 86–53–3 |- style="background:#fbb" | 143 || September 16 || Reds || 0–2 || Ewell Blackwell (15–15) || Bob Miller (11–5) || None || 12,052 || 86–54–3 |- style="background:#bfb" | 144 || September 17 || Pirates || 5–3 || Russ Meyer (9–11) || Bill Werle (8–14) || Jim Konstanty (22)