143 || September 10 || @ Cardinals || 3–4 (6) || Tom Poholsky (8–10) || Robin Roberts (22–12) || None || 4,471 || 72–71 |- style="background:#fbb" | 144 || September 11 (1) || @ Braves || 4–5 || Ernie Johnson (5–6) || Herm Wehmeier (10–11) || None || see 2nd game || 72–72 |- style="background:#fbb" | 145 || September 11 (2) || @ Braves || 1–9 || Humberto Robinson (3–0) || Saul Rogovin (4–11) || None || 26,426 || 72–73 |- style="background:#bfb" | 146 || September 13 || @ Cubs || 10–0 || Murry Dickson (12–10) || Sam Jones (13–19) || None || 1,785 || 73–73 |- style="background:#bfb" | 147 || September 16 || Pirates || 8–1 || Robin Roberts (23–12) || Max Surkont (7–13) || None || 10,023 || 74–73 |- style="background:#fbb" | 148 || September 18 (1) || Pirates || 2–5 || Bob Friend (13–9) || Herm Wehmeier (10–12) || Roy Face (5) || see 2nd game || 74–74 |- style="background:#bfb" | 149 || September 18 (2) || Pirates || 2–1 || Saul Rogovin (5–11) || Dick Hall (5–6) || None || 12,683 || 75–74 |- style="background:#fbb" | 150 || September 20 (1) || @ Dodgers || 3–6 || Clem Labine (13–5) || Murry Dickson (12–11) || Don Bessent (3) || see 2nd game || 75–75 |- style="background:#fbb" | 151 || September 20 (2) || @ Dodgers || 1–6 || Roger Craig (5–3) || Robin Roberts (23–13) || None || 8,763 || 75–76 |- style="background:#bfb" | 152 || September 23 || @ Giants || 5–1 || Saul Rogovin (6–11) || Rubén Gómez (9–10) || None || 1,154 || 76–76 |- style="background:#bbb" | – || September 24 || @ Giants || colspan=6 | Postponed (rain); Makeup: September 25 as a traditional double-header |- style="background:#fbb" | 153 || September 25 (1) || @ Giants || 2–5 || Pete Burnside (1–0) || Robin Roberts (23–14) || None || see 2nd game || 76–77 |- style="background:#bfb" | 154 || September 25 (2) || @ Giants || 3–1 || Curt Simmons (8–8) || Jim Hearn (14–16) || Jack Meyer (16) || 6,848 || 77–77 |- | style="text-align:left;" | The second game on April 24 was suspended (Sunday curfew) in the bottom of the eighth inning with the score 2–0 and was completed June 28, 1955. The second game on May 1 was suspended (Sunday curfew) in the bottom of the ninth inning with