2 || Padres || 4–7 || Jimmy Jones (9–12) || Don Carman (9–10) || Mark Davis (25) || 15,384 || 54–79–1 |- style="background:#fbb" | 135 || September 3 || Padres || 2–5 || Ed Whitson (12–8) || Kevin Gross (11–12) || None || 16,315 || 54–80–1 |- style="background:#bbb" | – || September 4 || Padres || colspan=6 | Cancelled (rain); Was not rescheduled |- style="background:#fbb" | 136 || September 5 (1) || @ Cubs || 3–14 || Rick Sutcliffe (12–11) || Bob Sebra (0–1) || None || see 2nd game || 54–81–1 |- style="background:#bfb" | 137 || September 5 (2) || @ Cubs || 4–3 || Shane Rawley (7–13) || Scott Sanderson (1–1) || Steve Bedrosian (24) || 27,084 || 55–81–1 |- style="background:#bfb" | 138 || September 6 || @ Cubs || 3–2 || Marvin Freeman (1–2) || Jamie Moyer (7–14) || Steve Bedrosian (25) || 23,189 || 56–81–1 |- style="background:#fbb" | 139 || September 7 || @ Cardinals || 0–5 || Joe Magrane (4–8) || Don Carman (9–11) || None || 23,535 || 56–82–1 |- style="background:#fbb" | 140 || September 8 || @ Cardinals || 0–1 || Larry McWilliams (5–6) || Kevin Gross (11–13) || Todd Worrell (28) || 19,211 || 56–83–1 |- style="background:#fbb" | 141 || September 9 || @ Pirates || 2–5 || Mike Dunne (7–11) || Bob Sebra (0–2) || Jim Gott (28) || 15,446 || 56–84–1 |- style="background:#fbb" | 142 || September 10 || @ Pirates || 1–5 || Dave LaPoint (14–11) || Shane Rawley (7–14) || None || 27,804 || 56–85–1 |- style="background:#bfb" | 143 || September 11 || @ Pirates || 7–4 || Marvin Freeman (2–2) || John Smiley (11–10) || None || 18,132 || 57–85–1 |- style="background:#bfb" | 144 || September 12 || Cubs || 5–1 || Don Carman (10–11) || Jamie Moyer (7–15) || Kent Tekulve (4) || 13,433 || 58–85–1 |- style="background:#fbb" | 145 || September 13 || Cubs || 2–9 || Greg Maddux (17–7) || Kevin Gross (11–14) || None || 13,301 || 58–86–1 |- style="background:#bfb" | 146 || September 14 || Cardinals || 9–2 || Bob Sebra (1–2) || Greg Mathews (4–6) || None || 13,829 || 59–86–1 |- style="background:#fbb" | 147 || September 15 || Cardinals || 1–3 || Scott Terry (9–3) || Shane Rawley (7–15) || Todd Worrell (30) || 10,434 || 59–87–1 |- style="background:#fbb" | 148 || September 16 || Pirates || 5–7 || Jeff