| 1989 Game Log (Overall Record: 67–95–1) |
April (11–12)
| # | Date | Opponent | Score | Win | Loss | Save | Attendance | Record |
| 1 | April 4 | @ Cubs | 4–5 | Rick Sutcliffe (1–0) | Floyd Youmans (0–1) | Mitch Williams (1) | 33,361 | 0–1 |
| 2 | April 5 | @ Cubs | 12–4 | Ken Howell (1–0) | Greg Maddux (0–1) | Mike Maddux (1) | 18,674 | 1–1 |
| 3 | April 6 | @ Cubs | 8–3 | Steve Ontiveros (1–0) | Paul Kilgus (0–1) | None | 6,364 | 2–1 |
| – | April 7 | Cardinals | Postponed (rain); Makeup: June 20 as a traditional double-header |
| 4 | April 8 | Cardinals | 5–4 (11) | Jeff Parrett (1–0) | John Costello (0–1) | None | 23,741 | 3–1 |
| 5 | April 9 | Cardinals | 3–15 | Joe Magrane (1–1) | Bruce Ruffin (0–1) | None | 31,631 | 3–2 |
| 6 | April 10 | Expos | 7–6 | Steve Bedrosian (1–0) | Gene Harris (1–1) | None | 13,194 | 4–2 |
| 7 | April 11 | Expos | 6–2 | Steve Ontiveros (2–0) | Pascual Pérez (0–1) | None | 14,429 | 5–2 |
| 8 | April 12 | Expos | 6–3 | Don Carman (1–0) | Kevin Gross (1–1) | Steve Bedrosian (1) | 15,461 | 6–2 |
| 9 | April 14 | Cubs | 4–6 | Scott Sanderson (1–0) | Bruce Ruffin (0–2) | Mitch Williams (5) | 20,851 | 6–3 |
| – | April 15 | Cubs | Postponed (rain); Makeup: July 31 as a traditional double-header |
| 10 | April 16 | Cubs | 3–5 | Rick Sutcliffe (3–0) | Floyd Youmans (0–2) | Mitch Williams (6) | 32,249 | 6–4 |
| 11 | April 17 | @ Mets | 2–5 | Sid Fernandez (1–0) | Don Carman (1–1) | Randy Myers (2) | 28,087 | 6–5 |
| 12 | April 18 | @ Mets | 7–1 | Larry McWilliams (1–0) | Ron Darling (0–3) | None | 26,300 | 7–5 |
| 13 | April 19 | @ Mets | 2–4 | Randy Myers (1–1) | Steve Bedrosian (1–1) | None | 25,694 | 7–6 |
| 14 | April 20 | @ Pirates | 9–4 | Ken Howell (2–0) | Mike Dunne (1–1) | None | 6,977 | 8–6 |
| 15 | April 21 | @ Pirates | 3–2 | Floyd Youmans (1–2) | Doug Drabek (1–1) | Steve Bedrosian (2) | 15,221 | 9–6 |
| 16 | April 22 | @ Pirates | 3–4 | Jeff Robinson (2–2) | Don Carman (1–2) | None | 14,669 | 9–7 |
| 17 | April 23 | @ Pirates | 4–6 | Logan Easley (1–0) | Steve Bedrosian (1–2) | None | 16,816 | 9–8 |
| 18 | April 24 | @ Astros | 8–4 | Greg A. Harris (1–0) | Bob Forsch (0–1) | None | 9,088 | 10–8 |
| 19 | April 25 | @ Astros | 1–4 | Mike Scott (3–1) | Ken Howell (2–1) | None | 12,584 | 10–9 |
| 20 | April 26 | @ Astros | 5–6 | Danny Darwin (2–1) | Jeff Parrett (1–1) | Dave Smith (3) | 11,195 | 10–10 |
| 21 | April 28 | Reds | 0–3 | José Rijo (1–0) | Don Carman (1–3) | John Franco (7) | 23,052 | 10–11 |
| 22 | April 29 | Reds | 8–0 (5) | Mike Maddux (1–0) | Danny Jackson (0–1) | None | 23,156 | 11–11 |
| 23 | April 30 | Reds | 3–5 | Rob Dibble (3–0) | Larry McWilliams (1–1) | John Franco (8) | 43,605 | 11–12 |
|
May (7–19)
| # | Date | Opponent | Score | Win | Loss | Save | Attendance | Record |
| – | May 1 | Astros | Postponed (rain); Makeup: July 13 as a traditional double-header |
| 24 | May 2 | Astros | 4–12 | Jim Deshaies (3–2) | Floyd Youmans (1–3) | None | 15,832 | 11–13 |
| 25 | May 3 | @ Braves | 3–6 | John Smoltz (4–2) | Don Carman (1–4) | None | 4,143 | 11–14 |
| 26 | May 4 | @ Braves | 0–3 | Tom Glavine (4–0) | Mike Maddux (1–1) | None | 2,047 | 11–15 |
| 27 | May 5 | @ Reds | 7–0 | Ken Howell (3–1) | Tom Browning (3–2) | None | 17,901 | 12–15 |
| 28 | May 6 | @ Reds | 4–7 | Rick Mahler (4–3) | Larry McWilliams (1–2) | John Franco (10) | 21,541 | 12–16 |
| 29 | May 7 | @ Reds | 5–0 | Alex Madrid (1–0) | Jack Armstrong (0–1) | None | 24,839 | 13–16 |
| 30 | May 9 | Braves | 2–7 | John Smoltz (5–2) | Don Carman (1–5) | None | 11,544 | 13–17 |
| – | May 10 | Braves | Postponed (rain); Makeup: June 30 as a traditional double-header |
| 31 | May 11 | Braves | 3–8 | Tom Glavine (5–0) | Randy O'Neal (0–1) | None | 14,841 | 13–18 |
| 32 | May 12 | Dodgers | 3–0 | Ken Howell (4–1) | Tim Leary (2–3) | Steve Bedrosian (3) | 23,292 | 14–18 |
| 33 | May 13 | Dodgers | 2–0 | Larry McWilliams (2–2) | Tim Belcher (2–4) | None | 30,294 | 15–18 |
| 34 | May 14 | Dodgers | 0–9 | Orel Hershiser (5–3) | Alex Madrid (1–1) | None | 29,092 | 15–19 |
| 35 | May 15 | Giants | 3–2 (12) | Steve Bedrosian (2–2) | Craig Lefferts (1–1) | None | 15,703 | 16–19 |
| 36 | May 16 | Giants | 5–13 | Atlee Hammaker (2–3) | Mike Maddux (1–2) | None | 14,074 | 16–20 |
| 37 | May 17 | Giants | 0–6 | Rick Reuschel (7–2) | Ken Howell (4–2) | None | 18,943 | 16–21 |
| 38 | May 19 | Padres | 2–8 | Ed Whitson (6–2) | Larry McWilliams (2–3) | None | 28,224 | 16–22 |
| 39 | May 20 | Padres | 2–3 | Dennis Rasmussen (2–4) | Don Carman (1–6) | Greg W. Harris (3) | 28,866 | 16–23 |
| 40 | May 21 | Padres | 3–1 | Bob Sebra (1–0) | Walt Terrell (3–5) | Steve Bedrosian (4) | 38,346 | 17–23 |
| 41 | May 23 | @ Dodgers | 4–1 | Ken Howell (5–2) | Fernando Valenzuela (0–4) | Steve Bedrosian (5) | 32,199 | 18–23 |
| 42 | May 24 | @ Dodgers | 2–4 | Tim Leary (3–3) | Larry McWilliams (2–4) | Jay Howell (7) | 37,089 | 18–24 |
| 43 | May 25 | @ Dodgers | 6–7 | Tim Belcher (4–4) | Don Carman (1–7) | Jay Howell (8) | 27,781 | 18–25 |
| 44 | May 26 | @ Giants | 1–6 | Scott Garrelts (3–1) | Bob Sebra (1–1) | None | 12,787 | 18–26 |
| 45 | May 27 | @ Giants | 2–6 | Atlee Hammaker (4–3) | Alex Madrid (1–2) | Craig Lefferts (8) | 18,325 | 18–27 |
| 46 | May 28 | @ Giants | 5–8 | Rick Reuschel (9–2) | Ken Howell (5–3) | Mike LaCoss (6) | 51,498 | 18–28 |
| 47 | May 29 | @ Padres | 0–1 | Bruce Hurst (5–3) | Larry McWilliams (2–5) | Mark Davis (16) | 21,161 | 18–29 |
| 48 | May 30 | @ Padres | 3–9 | Ed Whitson (8–2) | Don Carman (1–8) | None | 11,710 | 18–30 |
| 49 | May 31 | @ Padres | 1–2 | Greg W. Harris (1–2) | Jeff Parrett (1–2) | Mark Davis (17) | 15,768 | 18–31 |
|
June (9–17–1)
| # | Date | Opponent | Score | Win | Loss | Save | Attendance | Record |
| 50 | June 2 | Expos | 1–2 (13) | Steve Frey (1–0) | Greg A. Harris (1–1) | Joe Hesketh (2) | 20,560 | 18–32 |
| 51 | June 3 | Expos | 5–7 | Kevin Gross (6–3) | Larry McWilliams (2–6) | Tim Burke (12) | 35,269 | 18–33 |
| 52 | June 4 | Expos | 4–7 | Dennis Martínez (5–1) | Don Carman (1–9) | Andy McGaffigan (2) | 30,926 | 18–34 |
| 53 | June 5 | Pirates | 3–3 (8) | None | None | None | 17,696 | 18–34–1 |
| 54 | June 6 | Pirates | 9–4 | Bob Sebra (2–1) | Brian Fisher (0–2) | Jeff Parrett (1) | 16,783 | 19–34–1 |
| 55 | June 7 | Pirates | 7–5 | Jeff Parrett (2–2) | Bob Kipper (0–3) | Steve Bedrosian (6) | 15,480 | 20–34–1 |
| 56 | June 8 | Pirates | 15–11 | Don Carman (2–9) | Jeff Robinson (2–6) | None | 18,511 | 21–34–1 |
| 57 | June 9 | @ Expos | 0–5 | Dennis Martínez (6–1) | Floyd Youmans (1–4) | None | 15,791 | 21–35–1 |
| 58 | June 10 | @ Expos | 1–9 | Bryn Smith (6–2) | Bruce Ruffin (0–3) | None | 23,981 | 21–36–1 |
| 59 | June 11 | @ Expos | 2–7 | Pascual Pérez (3–7) | Bob Sebra (2–2) | None | 34,365 | 21–37–1 |
| 60 | June 13 | @ Pirates | 10–2 | Ken Howell (6–3) | Morris Madden (1–1) | None | 11,570 | 22–37–1 |
| 61 | June 14 | @ Pirates | 4–6 | John Smiley (6–2) | Don Carman (2–10) | Bill Landrum (2) | 7,407 | 22–38–1 |
| 62 | June 15 | @ Pirates | 3–5 | Doug Drabek (4–5) | Bob Sebra (2–3) | Bill Landrum (3) | 15,428 | 22–39–1 |
| 63 | June 16 | Mets | 11–15 | Randy Myers (6–2) | Steve Bedrosian (2–3) | None | 33,135 | 22–40–1 |
| 64 | June 17 | Mets | 0–1 | Bob Ojeda (4–6) | Larry McWilliams (2–7) | None | 46,570 | 22–41–1 |
| 65 | June 18 | Mets | 6–5 | Jeff Parrett (3–2) | Randy Myers (6–3) | None | 43,689 | 23–41–1 |
| 66 | June 20 (1) | Cardinals | 4–6 | Ken Hill (4–4) | Terry Mulholland (0–1) | Ken Dayley (5) | see 2nd game | 23–42–1 |
| 67 | June 20 (2) | Cardinals | 3–5 | Frank DiPino (4–0) | Steve Ontiveros (2–1) | Todd Worrell (8) | 27,285 | 23–43–1 |
| – | June 21 | Cardinals | Postponed (rain); Makeup: September 15 as a traditional double-header |
| 68 | June 22 | Cardinals | 11–2 | Dennis Cook (2–0) | José DeLeón (8–6) | None | 26,006 | 24–43–1 |
| 69 | June 23 | @ Mets | 3–9 | Bob Ojeda (5–6) | Ken Howell (6–4) | Randy Myers (10) | 44,828 | 24–44–1 |
| 70 | June 24 | @ Mets | 2–4 | Ron Darling (5–5) | Floyd Youmans (1–5) | Randy Myers (11) | 48,323 | 24–45–1 |
| 71 | June 25 | @ Mets | 1–5 | Sid Fernandez (5–2) | Terry Mulholland (0–2) | None | 47,692 | 24–46–1 |
| 72 | June 26 | @ Cardinals | 5–4 | Jeff Parrett (4–2) | Todd Worrell (1–2) | Roger McDowell (5) | 32,723 | 25–46–1 |
| 73 | June 27 | @ Cardinals | 4–2 | Dennis Cook (3–0) | José DeLeón (8–7) | Roger McDowell (6) | 30,482 | 26–46–1 |
| 74 | June 28 | @ Cardinals | 1–2 | Joe Magrane (7–6) | Ken Howell (6–5) | None | 37,018 | 26–47–1 |
| 75 | June 30 (1) | Braves | 4–2 | Terry Mulholland (1–2) | Zane Smith (1–12) | Jeff Parrett (2) | see 2nd game | 27–47–1 |
| 76 | June 30 (2) | Braves | 1–3 | Derek Lilliquist (5–4) | Larry McWilliams (2–8) | Joe Boever (13) | 25,586 | 27–48–1 |
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July (15–14)
| # | Date | Opponent | Score | Win | Loss | Save | Attendance | Record |
| 77 | July 1 | Braves | 4–2 | Bruce Ruffin (1–3) | Pete Smith (2–9) | Roger McDowell (7) | 33,045 | 28–48–1 |
| 78 | July 2 | Braves | 1–3 | John Smoltz (10–6) | Dennis Cook (3–1) | None | 28,524 | 28–49–1 |
| 79 | July 3 | Reds | 2–1 | Ken Howell (7–5) | José Rijo (7–6) | Roger McDowell (8) | 56,498 | 29–49–1 |
| 80 | July 4 | Reds | 1–2 | Tom Browning (7–6) | Terry Mulholland (1–3) | John Franco (22) | 14,636 | 29–50–1 |
| 81 | July 5 | Reds | 3–2 (10) | Roger McDowell (2–5) | John Franco (2–2) | None | 11,935 | 30–50–1 |
| 82 | July 6 | @ Braves | 4–0 | Bruce Ruffin (2–3) | Pete Smith (2–10) | Jeff Parrett (3) | 6,544 | 31–50–1 |
| 83 | July 7 | @ Braves | 3–5 | John Smoltz (11–6) | Dennis Cook (3–2) | Joe Boever (14) | 11,450 | 31–51–1 |
| 84 | July 8 | @ Braves | 3–4 | Paul Assenmacher (1–2) | Jeff Parrett (4–3) | Joe Boever (15) | 21,337 | 31–52–1 |
| 85 | July 9 | @ Braves | 4–3 (13) | Jeff Parrett (5–3) | Joe Boever (2–3) | None | 9,292 | 32–52–1 |
| – | July 11 | 1989 Major League Baseball All-Star Game at Anaheim Stadium in Anaheim |
| 86 | July 13 (1) | Astros | 11–4 | Bruce Ruffin (3–3) | Bob Knepper (3–10) | Greg A. Harris (1) | see 2nd game | 33–52–1 |
| 87 | July 13 (2) | Astros | 0–3 | Bob Forsch (2–2) | Dennis Cook (3–3) | Dave Smith (19) | 22,771 | 33–53–1 |
| 88 | July 14 | Astros | 4–2 | Jeff Parrett (6–3) | Larry Andersen (2–2) | None | 32,300 | 34–53–1 |
| 89 | July 15 | Astros | 6–9 | Mark Portugal (1–1) | Larry McWilliams (2–9) | None | 25,574 | 34–54–1 |
| – | July 16 | Astros | Postponed (rain); Makeup: July 22 as a traditional double-header |
| 90 | July 17 | @ Reds | 4–1 | Ken Howell (8–5) | Ron Robinson (0–1) | Roger McDowell (9) | 24,167 | 35–54–1 |
| 91 | July 18 | @ Reds | 6–5 | Todd Frohwirth (1–0) | Danny Jackson (6–10) | Roger McDowell (10) | 19,970 | 36–54–1 |
| 92 | July 19 | @ Reds | 9–4 | Dennis Cook (4–3) | Tom Browning (7–9) | None | 17,739 | 37–54–1 |
| 93 | July 21 | @ Astros | 2–4 | Mike Scott (15–15) | Terry Mulholland (1–4) | Dave Smith (20) | 25,501 | 37–55–1 |
| 94 | July 22 (1) | @ Astros | 0–1 | Jim Deshaies (10–4) | Ken Howell (8–6) | Dave Smith (21) | see 2nd game | 37–56–1 |
| 95 | July 22 (2) | @ Astros | 3–4 | Danny Darwin (10–2) | Larry McWilliams (2–10) | None | 35,803 | 37–57–1 |
| 96 | July 23 | @ Astros | 2–3 | Bob Forsch (3–3) | Bruce Ruffin (3–4) | Larry Andersen (2) | 20,222 | 37–58–1 |
| 97 | July 24 | @ Expos | 3–4 (12) | Andy McGaffigan (3–4) | Greg A. Harris (1–2) | None | 25,218 | 37–59–1 |
| 98 | July 25 | @ Expos | 0–2 | Mark Langston (12–8) | Don Carman (2–11) | None | 30,103 | 37–60–1 |
| 99 | July 26 | @ Expos | 4–3 | Jeff Parrett (7–3) | Zane Smith (1–13) | Roger McDowell (11) | 24,377 | 38–60–1 |
| 100 | July 28 (1) | Pirates | 5–10 | Neal Heaton (2–7) | Ken Howell (8–7) | None | see 2nd game | 38–61–1 |
| 101 | July 28 (2) | Pirates | 6–1 | Greg A. Harris (2–2) | Rick Reed (0–1) | None | 35,569 | 39–61–1 |
| 102 | July 29 | Pirates | 6–2 | Jeff Parrett (8–3) | Bob Walk (8–7) | Roger McDowell (12) | 47,277 | 40–61–1 |
| 103 | July 30 | Pirates | 8–6 | Dennis Cook (5–3) | Bob Kipper (3–4) | Roger McDowell (13) | 31,341 | 41–61–1 |
| 104 | July 31 (1) | Cubs | 2–10 | Rick Sutcliffe (11–9) | Terry Mulholland (1–5) | None | see 2nd game | 41–62–1 |
| 105 | July 31 (2) | Cubs | 7–4 | Don Carman (3–11) | Paul Kilgus (6–10) | Jeff Parrett (4) | 22,160 | 42–62–1 |
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August (12–17)
| # | Date | Opponent | Score | Win | Loss | Save | Attendance | Record |
| 106 | August 1 | Cubs | 1–4 | Steve Wilson (4–0) | Larry McWilliams (2–11) | Mitch Williams (27) | 23,614 | 42–63–1 |
| 107 | August 2 | Cubs | 6–0 | Ken Howell (9–7) | Scott Sanderson (9–7) | None | 21,688 | 43–63–1 |
| 108 | August 3 | Cubs | 0–2 | Greg Maddux (12–8) | Bruce Ruffin (3–5) | Les Lancaster (3) | 21,983 | 43–64–1 |
| 109 | August 4 | @ Cardinals | 3–6 | Joe Magrane (13–7) | Dennis Cook (5–4) | Todd Worrell (16) | 44,149 | 43–65–1 |
| 110 | August 5 | @ Cardinals | 7–3 | Terry Mulholland (2–5) | José DeLeón (11–10) | Jeff Parrett (5) | 46,504 | 44–65–1 |
| 111 | August 6 | @ Cardinals | 4–5 (10) | Todd Worrell (2–3) | Jeff Parrett (8–4) | None | 38,736 | 44–66–1 |
| 112 | August 7 | Mets | 2–1 | Roger McDowell (3–5) | Jeff Musselman (1–3) | None | 35,350 | 45–66–1 |
| 113 | August 8 | Mets | 0–9 | David Cone (9–5) | Bruce Ruffin (3–6) | None | 35,196 | 45–67–1 |
| 114 | August 9 | Mets | 0–6 | Bob Ojeda (8–9) | Dennis Cook (5–5) | None | 43,462 | 45–68–1 |
| 115 | August 10 | @ Cubs | 16–13 | Jeff Parrett (9–4) | Steve Wilson (5–1) | None | 36,745 | 46–68–1 |
| 116 | August 11 | @ Cubs | 2–9 | Greg Maddux (14–8) | Don Carman (3–12) | None | 36,440 | 46–69–1 |
| 117 | August 12 | @ Cubs | 7–9 | Mike Bielecki (13–5) | Ken Howell (9–8) | Mitch Williams (30) | 37,752 | 46–70–1 |
| 118 | August 13 | @ Cubs | 5–4 | Jeff Parrett (10–4) | Steve Wilson (5–2) | None | 37,054 | 47–70–1 |
| 119 | August 15 | Dodgers | 7–6 | Jeff Parrett (11–4) | Ray Searage (3–3) | None | 25,169 | 48–70–1 |
| 120 | August 16 | Dodgers | 6–2 | Don Carman (4–12) | Tim Belcher (8–12) | Roger McDowell (14) | 25,703 | 49–70–1 |
| 121 | August 17 | Dodgers | 4–10 | Fernando Valenzuela (8–11) | Ken Howell (9–9) | Alejandro Peña (4) | 25,779 | 49–71–1 |
| 122 | August 18 | Giants | 2–5 | Rick Reuschel (14–5) | Bruce Ruffin (3–7) | Steve Bedrosian (17) | 23,368 | 49–72–1 |
| 123 | August 19 | Giants | 1–0 | Terry Mulholland (3–5) | Kelly Downs (2–4) | None | 30,366 | 50–72–1 |
| 124 | August 20 | Giants | 2–5 | Jeff Brantley (7–1) | Roger McDowell (3–6) | None | 36,530 | 50–73–1 |
| 125 | August 21 | Padres | 2–8 | Dennis Rasmussen (6–9) | Don Carman (4–13) | None | 17,467 | 50–74–1 |
| 126 | August 22 | Padres | 4–2 | Ken Howell (10–9) | Mark Grant (5–2) | Roger McDowell (15) | 21,419 | 51–74–1 |
| 127 | August 23 | Padres | 3–7 | Andy Benes (1–2) | Bruce Ruffin (3–8) | None | 20,455 | 51–75–1 |
| 128 | August 25 | @ Dodgers | 3–2 | Terry Mulholland (4–5) | Ramón Martínez (3–2) | Jeff Parrett (6) | 33,541 | 52–75–1 |
| 129 | August 26 | @ Dodgers | 0–4 | Tim Belcher (10–12) | Dennis Cook (5–6) | None | 42,000 | 52–76–1 |
| 130 | August 27 | @ Dodgers | 1–8 | Fernando Valenzuela (9–12) | Don Carman (4–14) | None | 28,496 | 52–77–1 |
| 131 | August 28 | @ Giants | 9–1 | Ken Howell (11–9) | Rick Reuschel (15–6) | None | 15,614 | 53–77–1 |
| 132 | August 29 | @ Giants | 6–1 | Bruce Ruffin (4–8) | Don Robinson (11–9) | Roger McDowell (16) | 13,952 | 54–77–1 |
| 133 | August 30 | @ Giants | 2–3 | Kelly Downs (3–5) | Terry Mulholland (4–6) | Steve Bedrosian (18) | 19,053 | 54–78–1 |
| 134 | August 31 | @ Padres | 1–5 | Dennis Rasmussen (8–9) | Don Carman (4–15) | Mark Grant (2) | 15,541 | 54–79–1 |
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September (12–16)
| # | Date | Opponent | Score | Win | Loss | Save | Attendance | Record |
| 135 | September 2 | @ Padres | 2–3 | Bruce Hurst (13–9) | Ken Howell (11–10) | Mark Davis (33) | 23,161 | 54–80–1 |
| 136 | September 3 | @ Padres | 5–9 | Andy Benes (3–2) | Dennis Cook (5–7) | Mark Davis (34) | 24,956 | 54–81–1 |
| 137 | September 4 | Pirates | 5–7 | Bob Patterson (1–1) | Mike Maddux (1–3) | Bill Landrum (22) | 13,317 | 54–82–1 |
| 138 | September 5 | Pirates | 3–2 | Jeff Parrett (12–4) | Bob Patterson (1–2) | None | 12,484 | 55–82–1 |
| 139 | September 6 | Cubs | 9–1 | Bruce Ruffin (5–8) | Greg Maddux (16–11) | None | 17,272 | 56–82–1 |
| 140 | September 7 | Cubs | 2–6 | Mike Bielecki (15–6) | Ken Howell (11–11) | None | 13,058 | 56–83–1 |
| 141 | September 8 | @ Expos | 4–3 | Jason Grimsley (1–0) | Kevin Gross (11–10) | Roger McDowell (17) | 18,151 | 57–83–1 |
| 142 | September 9 | @ Expos | 5–6 | Tim Burke (8–3) | Jeff Parrett (12–5) | None | 22,981 | 57–84–1 |
| 143 | September 10 | @ Expos | 4–2 | Pat Combs (1–0) | Pascual Pérez (8–13) | Roger McDowell (18) | 22,630 | 58–84–1 |
| 144 | September 11 | Mets | 2–5 | Ron Darling (13–12) | Bruce Ruffin (5–9) | Randy Myers (23) | 18,690 | 58–85–1 |
| 145 | September 12 | Mets | 2–1 | Roger McDowell (4–6) | Don Aase (1–5) | None | 22,953 | 59–85–1 |
| 146 | September 13 | Mets | 4–10 | Bob Ojeda (12–10) | Jason Grimsley (1–1) | None | 20,062 | 59–86–1 |
| 147 | September 15 (1) | Cardinals | 2–0 | Pat Combs (2–0) | Ken Hill (7–13) | None | see 2nd game | 60–86–1 |
| 148 | September 15 (2) | Cardinals | 6–7 | John Costello (4–3) | Roger McDowell (4–7) | None | 22,579 | 60–87–1 |
| – | September 16 | Cardinals | Postponed (rain); Makeup: September 17 as a traditional double-header |
| 149 | September 17 (1) | Cardinals | 9–5 (12) | Dennis Cook (6–7) | Matt Kinzer (0–2) | None | see 2nd game | 61–87–1 |
| 150 | September 17 (2) | Cardinals | 0–2 | Cris Carpenter (4–4) | Ken Howell (11–12) | John Costello (2) | 23,043 | 61–88–1 |
| 151 | September 18 | @ Pirates | 2–6 | Bob Patterson (3–2) | Jason Grimsley (1–2) | Randy Kramer (2) | 7,665 | 61–89–1 |
| 152 | September 19 | @ Pirates | 2–4 | Jeff Robinson (7–11) | Bruce Ruffin (5–10) | Bill Landrum (24) | 8,156 | 61–90–1 |
| 153 | September 20 | @ Cubs | 9–8 | Don Carman (5–15) | Les Lancaster (3–2) | Roger McDowell (19) | 21,620 | 62–90–1 |
| 154 | September 21 | @ Cubs | 1–9 | Greg Maddux (18–12) | Terry Mulholland (4–7) | None | 22,885 | 62–91–1 |
| 155 | September 22 | @ Cardinals | 1–2 (10) | John Costello (5–3) | Roger McDowell (4–8) | None | 45,685 | 62–92–1 |
| 156 | September 23 | @ Cardinals | 5–11 | Frank DiPino (9–0) | Dennis Cook (6–8) | None | 38,936 | 62–93–1 |
| 157 | September 24 | @ Cardinals | 1–2 | Ted Power (7–7) | Jeff Parrett (12–6) | John Costello (3) | 38,795 | 62–94–1 |
| 158 | September 25 | @ Mets | 2–1 | Pat Combs (3–0) | Bob Ojeda (13–11) | Roger McDowell (20) | 18,001 | 63–94–1 |
| 159 | September 26 | @ Mets | 0–3 | Sid Fernandez (13–5) | Jason Grimsley (1–3) | None | 17,385 | 63–95–1 |
| 160 | September 27 | @ Mets | 5–3 | Ken Howell (12–12) | Ron Darling (14–14) | Roger McDowell (21) | 18,666 | 64–95–1 |
| 161 | September 29 | Expos | 2–0 | Dennis Cook (7–8) | Mark Langston (16–14) | None | 15,771 | 65–95–1 |
| 162 | September 30 | Expos | 6–3 | Bruce Ruffin (6–10) | Mark Gardner (0–3) | Roger McDowell (22) | 20,448 | 66–95–1 |
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- Phillies win
- Phillies loss
- Phillies tie
- Postponement
- Bold: Phillies team member
Source:[8] |