| 1989-04-03 | @ CIN | 1 | L 4-6 | 0-1 | 5 | 55,385 | Tim Belcher | Danny Jackson | Danny Jackson | Tim Belcher | John Franco | 4 | 6 | -2 |
| 1989-04-05 | @ CIN | 2 | L 3-4 | 0-2 | 6 | 20,964 | Orel Hershiser | Tom Browning | Tom Browning | Orel Hershiser | John Franco | 7 | 10 | -3 |
| 1989-04-06 | @ CIN | 3 | W 4-1 | 1-2 | 5 | 18,573 | Tim Leary | Rick Mahler | Tim Leary | Rick Mahler | | 11 | 11 | 0 |
| 1989-04-07 | @ ATL | 4 | L 1-6 | 1-3 | 6 | 31,929 | Fernando Valenzuela | Tom Glavine | Tom Glavine | Fernando Valenzuela | | 12 | 17 | -5 |
| 1989-04-09 | @ ATL | 5 | W 4-2 | 2-3 | 5 | 17,041 | Tim Belcher | Zane Smith | Alejandro Pena | Mark Eichhorn | Tim Crews | 16 | 19 | -3 |
| 1989-04-10 | @ SFN | 6 | W 7-4 | 3-3 | 4 | 53,015 | Orel Hershiser | Don Robinson | Orel Hershiser | Mike LaCoss | Alejandro Pena | 23 | 23 | 0 |
| 1989-04-11 | @ SFN | 7 | L 3-8 | 3-4 | 5 | 17,722 | Tim Leary | Kelly Downs | Kelly Downs | Tim Leary | Craig Lefferts | 26 | 31 | -5 |
| 1989-04-12 | @ SFN | 8 | L 1-3 | 3-5 | 5 | 19,035 | Fernando Valenzuela | Scott Garrelts | Scott Garrelts | Fernando Valenzuela | Mike LaCoss | 27 | 34 | -7 |
| 1989-04-13 | vs HOU | 9 | L 2-4 | 3-6 | 6 | 47,136 | Tim Belcher | Jim Clancy | Bob Forsch | Ray Searage | | 29 | 38 | -9 |
| 1989-04-14 | vs HOU | 10 | L 2-3 | 3-7 | 6 | 44,312 | Mike Morgan | Mike Scott | Mike Scott | Mike Morgan | | 31 | 41 | -10 |
| 1989-04-15 | vs HOU | 11 | W 3-1 | 4-7 | 6 | 43,836 | Orel Hershiser | Bob Knepper | Orel Hershiser | Bob Knepper | Alejandro Pena | 34 | 42 | -8 |
| 1989-04-16 | vs HOU | 12 | W 2-1 | 5-7 | 5 | 39,520 | Tim Leary | Jim Deshaies | Tim Leary | Jim Deshaies | | 36 | 43 | -7 |
| 1989-04-17 | vs CIN | 13 | L 2-3 | 5-8 | 6 | 32,489 | Fernando Valenzuela | Jose Rijo | Rob Dibble | Jay Howell | John Franco | 38 | 46 | -8 |
| 1989-04-18 | vs CIN | 14 | W 6-0 | 6-8 | 5 | 33,619 | Tim Belcher | Danny Jackson | Tim Belcher | Danny Jackson | | 44 | 46 | -2 |
| 1989-04-19 | vs CIN | 15 | W 3-0 | 7-8 | 5 | 48,295 | Mike Morgan | Tom Browning | Mike Morgan | Tom Browning | Jay Howell | 47 | 46 | 1 |
| 1989-04-21 | vs SFN | 16 | W 8-2 | 8-8 | 4 | 47,251 | Orel Hershiser | Kelly Downs | Orel Hershiser | Kelly Downs | | 55 | 48 | 7 |
| 1989-04-22 | vs SFN | 17 | L 4-5 | 8-9 | 5 | 48,437 | Tim Leary | Scott Garrelts | Craig Lefferts | Jay Howell | | 59 | 53 | 6 |
| 1989-04-23 | vs SFN | 18 | W 7-6 | 9-9 | 4 | 48,493 | Fernando Valenzuela | Rick Reuschel | Jay Howell | Atlee Hammaker | | 66 | 59 | 7 |
| 1989-04-25 | @ CHN | 19 | W 4-0 | 10-9 | 3 | 31,876 | Tim Belcher | Scott Sanderson | Tim Belcher | Scott Sanderson | | 70 | 59 | 11 |
| 1989-04-26 | @ CHN | 20 | W 3-1 | 11-9 | 2 | 13,221 | Mike Morgan | Rick Sutcliffe | Mike Morgan | Rick Sutcliffe | Jay Howell | 73 | 60 | 13 |
| 1989-04-27 | @ CHN | 21 | L 0-1 | 11-10 | 3 | 12,013 | Orel Hershiser | Greg Maddux | Greg Maddux | Orel Hershiser | | 73 | 61 | 12 |
| 1989-04-28 | @ SLN | 22 | L 3-6 | 11-11 | 3 | 39,918 | Tim Leary | Don Heinkel | Don Heinkel | Tim Leary | | 76 | 67 | 9 |
| 1989-04-29 | @ SLN | 23 | L 0-1 | 11-12 | 4 | 40,282 | Fernando Valenzuela | Ken Hill | Cris Carpenter | Ray Searage | | 76 | 68 | 8 |
| 1989-04-30 | @ SLN | 24 | L 3-4 | 11-13 | 4 | 48,726 | Tim Belcher | Joe Magrane | Joe Magrane | Tim Belcher | Ken Dayley | 79 | 72 | 7 |
| 1989-05-01 | vs PIT | 25 | W 1-0 | 12-13 | 3 | 27,630 | Mike Morgan | Doug Drabek | Jay Howell | Doug Drabek | | 80 | 72 | 8 |
| 1989-05-02 | vs PIT | 26 | W 7-0 | 13-13 | 3 | 29,310 | Orel Hershiser | Neal Heaton | Orel Hershiser | Neal Heaton | | 87 | 72 | 15 |
| 1989-05-03 | vs SLN | 27 | W 4-3 | 14-13 | 2 | 34,861 | Tim Leary | Don Heinkel | Ray Searage | Ken Dayley | | 91 | 75 | 16 |
| 1989-05-04 | vs SLN | 28 | L 0-12 | 14-14 | 2 | 36,689 | Fernando Valenzuela | Ken Hill | Ken Hill | Fernando Valenzuela | | 91 | 87 | 4 |
| 1989-05-05 | vs CHN | 29 | L 2-4 | 14-15 | 3 | 46,767 | Tim Belcher | Scott Sanderson | Scott Sanderson | Tim Belcher | Mitch Williams | 93 | 91 | 2 |
| 1989-05-06 | vs CHN | 30 | W 3-0 | 15-15 | 2 | 46,389 | Mike Morgan | Rick Sutcliffe | Mike Morgan | Rick Sutcliffe | Jay Howell | 96 | 91 | 5 |
| 1989-05-07 | vs CHN | 31 | L 2-4 | 15-16 | 4 | 46,329 | Orel Hershiser | Greg Maddux | Steve Wilson | Orel Hershiser | Mitch Williams | 98 | 95 | 3 |
| 1989-05-12 | @ PHI | 32 | L 0-3 | 15-17 | 5 | 23,292 | Tim Leary | Ken Howell | Ken Howell | Tim Leary | Steve Bedrosian | 98 | 98 | 0 |
| 1989-05-13 | @ PHI | 33 | L 0-2 | 15-18 | 6 | 30,294 | Tim Belcher | Larry McWilliams | Larry McWilliams | Tim Belcher | | 98 | 100 | -2 |
| 1989-05-14 | @ PHI | 34 | W 9-0 | 16-18 | 5 | 29,092 | Orel Hershiser | Alex Madrid | Orel Hershiser | Alex Madrid | | 107 | 100 | 7 |
| 1989-05-15 | @ NYN | 35 | W 3-1 | 17-18 | 3 | 34,622 | Mike Morgan | Sid Fernandez | Ray Searage | Roger McDowell | Jay Howell | 110 | 101 | 9 |
| 1989-05-17 | @ NYN | 36 | W 4-3 | 18-18 | 4 | 37,655 | Fernando Valenzuela | Ron Darling | Alejandro Pena | Rick Aguilera | Jay Howell | 114 | 104 | 10 |
| 1989-05-18 | @ NYN | 37 | L 3-5 | 18-19 | 5 | 31,189 | Tim Leary | Dwight Gooden | Dwight Gooden | Alejandro Pena | Randy Myers | 117 | 109 | 8 |
| 1989-05-19 | @ MON | 38 | W 8-0 | 19-19 | 5 | 16,197 | Tim Belcher | Kevin Gross | Tim Belcher | Kevin Gross | | 125 | 109 | 16 |
| 1989-05-20 | @ MON | 39 | W 3-2 | 20-19 | 4 | 15,807 | Orel Hershiser | Dennis Martinez | Orel Hershiser | Pascual Perez | Jay Howell | 128 | 111 | 17 |
| 1989-05-21 | @ MON | 40 | L 1-3 | 20-20 | 5 | 24,231 | Mike Morgan | Bryn Smith | Bryn Smith | Mike Morgan | | 129 | 114 | 15 |
| 1989-05-23 | vs PHI | 41 | L 1-4 | 20-21 | 4 | 32,199 | Fernando Valenzuela | Ken Howell | Ken Howell | Fernando Valenzuela | Steve Bedrosian | 130 | 118 | 12 |
| 1989-05-24 | vs PHI | 42 | W 4-2 | 21-21 | 4 | 37,089 | Tim Leary | Larry McWilliams | Tim Leary | Larry McWilliams | Jay Howell | 134 | 120 | 14 |
| 1989-05-25 | vs PHI | 43 | W 7-6 | 22-21 | 4 | 27,781 | Tim Belcher | Don Carman | Tim Belcher | Don Carman | Jay Howell | 141 | 126 | 15 |
| 1989-05-26 | vs NYN | 44 | L 2-8 | 22-22 | 4 | 47,034 | Orel Hershiser | Bob Ojeda | Bob Ojeda | Orel Hershiser | | 143 | 134 | 9 |
| 1989-05-27 | vs NYN | 45 | W 2-1 | 23-22 | 4 | 47,083 | Mike Morgan | Sid Fernandez | Mike Morgan | Sid Fernandez | Jay Howell | 145 | 135 | 10 |
| 1989-05-28 | vs NYN | 46 | W 4-3 | 24-22 | 3 | 46,060 | Fernando Valenzuela | Dwight Gooden | Ray Searage | Roger McDowell | | 149 | 138 | 11 |
| 1989-05-29 | vs MON | 47 | L 2-3 | 24-23 | 4 | 44,953 | Tim Leary | Kevin Gross | Pascual Perez | Tim Leary | Tim Burke | 151 | 141 | 10 |
| 1989-05-30 | vs MON | 48 | L 4-5 | 24-24 | 5 | 25,336 | Tim Belcher | Dennis Martinez | Joe Hesketh | Jay Howell | Tim Burke | 155 | 146 | 9 |
| 1989-05-31 | vs MON | 49 | W 9-4 | 25-24 | 5 | 22,858 | Orel Hershiser | Bryn Smith | Orel Hershiser | Joe Hesketh | | 164 | 150 | 14 |
| 1989-06-01 | @ HOU | 50 | L 2-7 | 25-25 | 5 | 18,488 | Mike Morgan | Jim Deshaies | Jim Deshaies | Mike Morgan | | 166 | 157 | 9 |
| 1989-06-02 | @ HOU | 51 | L 0-1 | 25-26 | 5 | 32,736 | Fernando Valenzuela | Mike Scott | Mike Scott | Fernando Valenzuela | | 166 | 158 | 8 |
| 1989-06-03 | @ HOU | 52 | L 4-5 | 25-27 | 5 | 34,425 | Tim Leary | Bob Knepper | Jim Clancy | Jeff Hamilton | | 170 | 163 | 7 |
| 1989-06-04 | @ HOU | 53 | L 6-7 | 25-28 | 5 | 30,311 | Tim Belcher | Bob Forsch | Mike Scott | Alejandro Pena | | 176 | 170 | 6 |
| 1989-06-05 | @ ATL | 54 | W 7-0 | 27-28 | 5 | 0 | Ramon Martinez | Pete Smith | Ramon Martinez | Pete Smith | | 183 | 170 | 13 |
| 1989-06-05 | @ ATL | 55 | W 5-2 | 27-28 | 5 | 10,340 | John Wetteland | John Smoltz | Tim Leary | John Smoltz | Jay Howell | 188 | 172 | 16 |
| 1989-06-06 | @ ATL | 56 | L 0-3 | 27-29 | 5 | 7,623 | Mike Morgan | Tom Glavine | Tom Glavine | Mike Morgan | | 188 | 175 | 13 |
| 1989-06-07 | @ ATL | 57 | W 5-4 | 28-29 | 5 | 11,324 | Fernando Valenzuela | Zane Smith | Fernando Valenzuela | Zane Smith | Jay Howell | 193 | 179 | 14 |
| 1989-06-09 | vs CIN | 58 | L 0-4 | 28-30 | 5 | 46,912 | Orel Hershiser | Jose Rijo | Jose Rijo | Orel Hershiser | | 193 | 183 | 10 |
| 1989-06-10 | vs CIN | 59 | L 0-5 | 28-31 | 5 | 42,207 | Tim Belcher | Tom Browning | Tom Browning | Tim Belcher | | 193 | 188 | 5 |
| 1989-06-11 | vs CIN | 60 | W 3-1 | 29-31 | 4 | 41,032 | Tim Leary | Scott Scudder | Tim Leary | Scott Scudder | Jay Howell | 196 | 189 | 7 |
| 1989-06-12 | vs CIN | 61 | W 9-2 | 30-31 | 4 | 28,161 | Mike Morgan | Rick Mahler | Mike Morgan | Rick Mahler | John Wetteland | 205 | 191 | 14 |
| 1989-06-13 | vs HOU | 62 | W 3-2 | 31-31 | 4 | 29,073 | Fernando Valenzuela | Mike Scott | Fernando Valenzuela | Mike Scott | Jay Howell | 208 | 193 | 15 |
| 1989-06-14 | vs HOU | 63 | W 3-0 | 32-31 | 4 | 30,430 | Orel Hershiser | Bob Knepper | Orel Hershiser | Bob Knepper | | 211 | 193 | 18 |
| 1989-06-15 | vs HOU | 64 | W 2-1 | 33-31 | 4 | 42,782 | Tim Belcher | Bob Forsch | John Wetteland | Juan Agosto | | 213 | 194 | 19 |
| 1989-06-16 | vs ATL | 65 | L 1-6 | 33-32 | 4 | 33,372 | Tim Leary | Tom Glavine | Tom Glavine | Tim Leary | | 214 | 200 | 14 |
| 1989-06-17 | vs ATL | 66 | L 1-2 | 33-33 | 4 | 42,940 | Mike Morgan | Pete Smith | Pete Smith | Mike Morgan | Joe Boever | 215 | 202 | 13 |
| 1989-06-18 | vs ATL | 67 | W 5-3 | 34-33 | 4 | 43,050 | Fernando Valenzuela | Zane Smith | Fernando Valenzuela | Zane Smith | Jay Howell | 220 | 205 | 15 |
| 1989-06-19 | @ SDN | 68 | L 1-5 | 34-34 | 4 | 27,282 | Orel Hershiser | Eric Show | Eric Show | Orel Hershiser | | 221 | 210 | 11 |
| 1989-06-20 | @ SDN | 69 | L 0-2 | 34-35 | 4 | 25,746 | Tim Belcher | Bruce Hurst | Bruce Hurst | Tim Belcher | | 221 | 212 | 9 |
| 1989-06-21 | @ SDN | 70 | W 6-2 | 35-35 | 4 | 29,336 | Tim Leary | Ed Whitson | Tim Leary | Ed Whitson | | 227 | 214 | 13 |
| 1989-06-23 | @ CIN | 71 | L 1-3 | 35-36 | 4 | 33,933 | Mike Morgan | Jose Rijo | Jose Rijo | Mike Morgan | John Franco | 228 | 217 | 11 |
| 1989-06-24 | @ CIN | 72 | W 10-3 | 36-36 | 4 | 37,211 | Fernando Valenzuela | Tim Birtsas | Fernando Valenzuela | Tim Birtsas | Tim Belcher | 238 | 220 | 18 |
| 1989-06-25 | @ CIN | 73 | W 7-0 | 37-36 | 4 | 36,063 | Orel Hershiser | Tom Browning | Orel Hershiser | Tom Browning | | 245 | 220 | 25 |
| 1989-06-26 | @ CIN | 74 | L 3-5 | 37-37 | 4 | 23,727 | Tim Leary | Rick Mahler | Rob Dibble | Tim Belcher | John Franco | 248 | 225 | 23 |
| 1989-06-27 | vs SDN | 75 | L 3-5 | 37-38 | 4 | 37,385 | John Tudor | Bruce Hurst | Pat Clements | Tim Belcher | | 251 | 230 | 21 |
| 1989-06-28 | vs SDN | 76 | L 1-2 | 37-39 | 5 | 33,708 | Mike Morgan | Ed Whitson | Ed Whitson | Mike Morgan | Mark Davis | 252 | 232 | 20 |
| 1989-06-29 | vs SDN | 77 | L 3-5 | 37-40 | 5 | 36,128 | Fernando Valenzuela | Dennis Rasmussen | Dennis Rasmussen | Fernando Valenzuela | Mark Davis | 255 | 237 | 18 |
| 1989-06-30 | vs PIT | 78 | L 3-4 | 37-41 | 5 | 46,411 | Orel Hershiser | Bob Walk | Bob Walk | Orel Hershiser | Bill Landrum | 258 | 241 | 17 |
| 1989-07-01 | vs PIT | 79 | W 1-0 | 38-41 | 5 | 33,692 | Tim Leary | John Smiley | Tim Belcher | John Smiley | | 259 | 241 | 18 |
| 1989-07-02 | vs PIT | 80 | W 3-2 | 39-41 | 5 | 40,789 | John Tudor | Doug Drabek | John Wetteland | Doug Drabek | Jay Howell | 262 | 243 | 19 |
| 1989-07-03 | vs PIT | 81 | L 2-4 | 39-42 | 5 | 29,673 | Mike Morgan | Jeff Robinson | Jeff Robinson | Mike Morgan | Bill Landrum | 264 | 247 | 17 |
| 1989-07-04 | @ SLN | 82 | L 1-2 | 39-43 | 5 | 35,532 | Fernando Valenzuela | Joe Magrane | Joe Magrane | Fernando Valenzuela | | 265 | 249 | 16 |
| 1989-07-05 | @ SLN | 83 | L 2-3 | 39-44 | 5 | 34,495 | Orel Hershiser | Scott Terry | John Costello | John Wetteland | Todd Worrell | 267 | 252 | 15 |
| 1989-07-06 | @ SLN | 84 | L 2-14 | 39-45 | 5 | 36,804 | Tim Leary | Ken Hill | Ken Hill | Tim Leary | Dan Quisenberry | 269 | 266 | 3 |
| 1989-07-07 | @ CHN | 85 | L 4-6 | 39-46 | 5 | 35,434 | John Tudor | Rick Sutcliffe | Rick Sutcliffe | John Wetteland | Mitch Williams | 273 | 272 | 1 |
| 1989-07-08 | @ CHN | 86 | W 8-2 | 40-46 | 5 | 37,096 | Mike Morgan | Jeff Pico | Mike Morgan | Jeff Pico | | 281 | 274 | 7 |
| 1989-07-09 | @ CHN | 87 | L 4-11 | 40-47 | 5 | 35,533 | Fernando Valenzuela | Mike Bielecki | Mike Bielecki | Fernando Valenzuela | | 285 | 285 | 0 |
| 1989-07-13 | vs SLN | 88 | W 3-2 | 41-47 | 5 | 33,358 | Orel Hershiser | Ken Hill | Orel Hershiser | Ken Hill | Jay Howell | 288 | 287 | 1 |
| 1989-07-14 | vs SLN | 89 | L 2-7 | 41-48 | 5 | 41,599 | Mike Morgan | Scott Terry | Scott Terry | Mike Morgan | | 290 | 294 | -4 |
| 1989-07-15 | vs SLN | 90 | L 0-2 | 41-49 | 5 | 45,517 | Fernando Valenzuela | Joe Magrane | Joe Magrane | Fernando Valenzuela | | 290 | 296 | -6 |
| 1989-07-16 | vs SLN | 91 | W 3-2 | 42-49 | 5 | 43,655 | Tim Belcher | Jose DeLeon | Tim Belcher | Jose DeLeon | Jay Howell | 293 | 298 | -5 |
| 1989-07-17 | vs CHN | 92 | L 3-6 | 42-50 | 5 | 39,914 | Ramon Martinez | Scott Sanderson | Les Lancaster | Tim Leary | Mitch Williams | 296 | 304 | -8 |
| 1989-07-18 | vs CHN | 93 | W 4-1 | 43-50 | 5 | 37,543 | Orel Hershiser | Greg Maddux | Orel Hershiser | Greg Maddux | | 300 | 305 | -5 |
| 1989-07-19 | vs CHN | 94 | L 0-4 | 43-51 | 5 | 40,050 | Mike Morgan | Mike Bielecki | Mike Bielecki | Mike Morgan | | 300 | 309 | -9 |
| 1989-07-21 | @ PIT | 95 | L 1-4 | 44-52 | 5 | 0 | Tim Belcher | John Smiley | John Smiley | Tim Belcher | | 301 | 313 | -12 |
| 1989-07-21 | @ PIT | 96 | W 7-3 | 44-52 | 5 | 27,996 | Fernando Valenzuela | Neal Heaton | Fernando Valenzuela | Neal Heaton | Jay Howell | 308 | 316 | -8 |
| 1989-07-22 | @ PIT | 97 | W 8-4 | 45-52 | 5 | 31,108 | Ramon Martinez | Jeff Robinson | Ramon Martinez | Jeff Robinson | | 316 | 320 | -4 |
| 1989-07-23 | @ PIT | 98 | W 4-3 | 46-53 | 4 | 0 | Orel Hershiser | Randy Kramer | Orel Hershiser | Randy Kramer | Jay Howell | 320 | 323 | -3 |
| 1989-07-23 | @ PIT | 99 | L 1-2 | 46-53 | 4 | 34,373 | John Wetteland | Rick Reed | Bob Kipper | Tim Crews | | 321 | 325 | -4 |
| 1989-07-24 | @ PIT | 100 | L 4-7 | 46-54 | 4 | 19,957 | Mike Morgan | Bob Walk | Bob Walk | Mike Morgan | | 325 | 332 | -7 |
| 1989-07-25 | @ HOU | 101 | W 6-0 | 47-54 | 4 | 28,910 | Tim Belcher | Rick Rhoden | Tim Belcher | Rick Rhoden | | 331 | 332 | -1 |
| 1989-07-26 | @ HOU | 102 | L 2-6 | 47-55 | 4 | 33,563 | Fernando Valenzuela | Mike Scott | Mike Scott | Fernando Valenzuela | | 333 | 338 | -5 |
| 1989-07-27 | @ HOU | 103 | W 7-5 | 48-55 | 4 | 30,466 | Ramon Martinez | Jim Deshaies | Mike Morgan | Larry Andersen | Jay Howell | 340 | 343 | -3 |
| 1989-07-28 | @ SDN | 104 | L 1-2 | 48-56 | 4 | 33,352 | Orel Hershiser | Bruce Hurst | Bruce Hurst | Orel Hershiser | | 341 | 345 | -4 |
| 1989-07-29 | @ SDN | 105 | L 4-9 | 48-57 | 5 | 39,707 | John Wetteland | Don Schulze | Don Schulze | John Wetteland | | 345 | 354 | -9 |
| 1989-07-30 | @ SDN | 106 | W 10-1 | 49-57 | 4 | 33,699 | Tim Belcher | Ed Whitson | Tim Belcher | Ed Whitson | | 355 | 355 | 0 |
| 1989-08-01 | vs SFN | 107 | L 2-5 | 49-58 | 4 | 35,716 | Fernando Valenzuela | Scott Garrelts | Scott Garrelts | Fernando Valenzuela | Craig Lefferts | 357 | 360 | -3 |
| 1989-08-02 | vs SFN | 108 | W 7-4 | 50-58 | 4 | 45,478 | Ramon Martinez | Atlee Hammaker | Ramon Martinez | Trevor Wilson | Jay Howell | 364 | 364 | 0 |
| 1989-08-03 | vs SFN | 109 | W 6-3 | 51-58 | 4 | 43,516 | Orel Hershiser | Russ Swan | Orel Hershiser | Russ Swan | Jay Howell | 370 | 367 | 3 |
| 1989-08-04 | vs SDN | 110 | W 6-3 | 52-58 | 4 | 38,250 | John Wetteland | Ed Whitson | John Wetteland | Ed Whitson | Jay Howell | 376 | 370 | 6 |
| 1989-08-05 | vs SDN | 111 | L 2-4 | 52-59 | 4 | 38,421 | Tim Belcher | Greg Harris | Greg Harris | Tim Belcher | Mark Davis | 378 | 374 | 4 |
| 1989-08-06 | vs SDN | 112 | W 4-2 | 53-59 | 4 | 41,775 | Fernando Valenzuela | Dennis Rasmussen | Fernando Valenzuela | Dennis Rasmussen | Jay Howell | 382 | 376 | 6 |
| 1989-08-07 | vs ATL | 113 | L 0-1 | 53-60 | 5 | 27,284 | Ramon Martinez | Tom Glavine | Tom Glavine | Ramon Martinez | | 382 | 377 | 5 |
| 1989-08-08 | vs ATL | 114 | W 10-2 | 54-60 | 5 | 30,713 | Orel Hershiser | John Smoltz | Orel Hershiser | John Smoltz | | 392 | 379 | 13 |
| 1989-08-09 | vs ATL | 115 | L 3-6 | 54-61 | 5 | 41,328 | John Wetteland | Pete Smith | Pete Smith | John Wetteland | Jim Acker | 395 | 385 | 10 |
| 1989-08-11 | @ SFN | 116 | L 2-10 | 54-62 | 5 | 33,307 | Tim Belcher | Mike LaCoss | Mike LaCoss | Tim Belcher | | 397 | 395 | 2 |
| 1989-08-12 | @ SFN | 117 | W 5-1 | 55-62 | 5 | 49,772 | Fernando Valenzuela | Bob Knepper | Fernando Valenzuela | Bob Knepper | | 402 | 396 | 6 |
| 1989-08-13 | @ SFN | 118 | W 3-2 | 56-62 | 5 | 53,821 | Orel Hershiser | Kelly Downs | Jay Howell | Don Robinson | Alejandro Pena | 405 | 398 | 7 |
| 1989-08-15 | @ PHI | 119 | L 6-7 | 56-63 | 5 | 25,169 | Ramon Martinez | Dennis Cook | Jeff Parrett | Ray Searage | | 411 | 405 | 6 |
| 1989-08-16 | @ PHI | 120 | L 2-6 | 56-64 | 5 | 25,703 | Tim Belcher | Don Carman | Don Carman | Tim Belcher | Roger McDowell | 413 | 411 | 2 |
| 1989-08-17 | @ PHI | 121 | W 10-4 | 57-64 | 4 | 25,779 | Fernando Valenzuela | Ken Howell | Fernando Valenzuela | Ken Howell | Alejandro Pena | 423 | 415 | 8 |
| 1989-08-18 | @ NYN | 122 | L 2-3 | 57-65 | 5 | 46,143 | Orel Hershiser | David Cone | David Cone | Orel Hershiser | Randy Myers | 425 | 418 | 7 |
| 1989-08-19 | @ NYN | 123 | L 1-4 | 57-66 | 5 | 38,453 | John Wetteland | Bob Ojeda | Bob Ojeda | John Wetteland | Randy Myers | 426 | 422 | 4 |
| 1989-08-20 | @ NYN | 124 | W 5-4 | 58-66 | 5 | 45,031 | Ramon Martinez | Sid Fernandez | Alejandro Pena | Don Aase | Jay Howell | 431 | 426 | 5 |
| 1989-08-21 | @ MON | 125 | W 6-1 | 59-66 | 5 | 24,440 | Tim Belcher | Mark Langston | Tim Belcher | Mark Langston | | 437 | 427 | 10 |
| 1989-08-22 | @ MON | 126 | L 2-4 | 59-67 | 5 | 23,810 | Fernando Valenzuela | Kevin Gross | Kevin Gross | Fernando Valenzuela | Tim Burke | 439 | 431 | 8 |
| 1989-08-23 | @ MON | 127 | W 1-0 | 60-67 | 5 | 21,742 | Orel Hershiser | Pascual Perez | John Wetteland | Dennis Martinez | | 440 | 431 | 9 |
| 1989-08-25 | vs PHI | 128 | L 2-3 | 60-68 | 5 | 33,541 | Ramon Martinez | Terry Mulholland | Terry Mulholland | Ramon Martinez | Jeff Parrett | 442 | 434 | 8 |
| 1989-08-26 | vs PHI | 129 | W 4-0 | 61-68 | 5 | 42,000 | Tim Belcher | Dennis Cook | Tim Belcher | Dennis Cook | | 446 | 434 | 12 |
| 1989-08-27 | vs PHI | 130 | W 8-1 | 62-68 | 5 | 28,496 | Fernando Valenzuela | Don Carman | Fernando Valenzuela | Don Carman | | 454 | 435 | 19 |
| 1989-08-28 | vs NYN | 131 | L 0-1 | 62-69 | 5 | 38,820 | Orel Hershiser | Frank Viola | Frank Viola | Orel Hershiser | | 454 | 436 | 18 |
| 1989-08-29 | vs NYN | 132 | L 1-2 | 62-70 | 5 | 36,756 | John Wetteland | David Cone | David Cone | John Wetteland | | 455 | 438 | 17 |
| 1989-08-30 | vs NYN | 133 | L 3-9 | 62-71 | 5 | 37,109 | Ramon Martinez | Sid Fernandez | Sid Fernandez | Ramon Martinez | | 458 | 447 | 11 |
| 1989-09-01 | vs MON | 134 | W 2-0 | 63-71 | 5 | 24,844 | Tim Belcher | Mark Langston | Tim Belcher | Mark Langston | | 460 | 447 | 13 |
| 1989-09-02 | vs MON | 135 | W 4-3 | 64-71 | 5 | 30,580 | Fernando Valenzuela | Bryn Smith | Jay Howell | Tim Burke | | 464 | 450 | 14 |
| 1989-09-03 | vs MON | 136 | L 0-4 | 64-72 | 5 | 37,011 | Orel Hershiser | Kevin Gross | Kevin Gross | Orel Hershiser | | 464 | 454 | 10 |
| 1989-09-04 | @ HOU | 137 | W 7-5 | 65-72 | 5 | 19,058 | John Wetteland | Mike Scott | Mike Morgan | Mike Scott | Jay Howell | 471 | 459 | 12 |
| 1989-09-05 | @ HOU | 138 | L 2-3 | 65-73 | 5 | 11,212 | Ramon Martinez | Rick Rhoden | Juan Agosto | Alejandro Pena | Larry Andersen | 473 | 462 | 11 |
| 1989-09-06 | @ CIN | 139 | L 5-9 | 65-74 | 5 | 14,448 | Tim Belcher | Ron Robinson | Rosario Rodriguez | Ray Searage | | 478 | 471 | 7 |
| 1989-09-07 | @ CIN | 140 | W 8-2 | 66-74 | 5 | 15,044 | Fernando Valenzuela | Tom Browning | Fernando Valenzuela | Tom Browning | | 486 | 473 | 13 |
| 1989-09-08 | @ SDN | 141 | L 0-1 | 66-75 | 5 | 30,349 | Orel Hershiser | Andy Benes | Andy Benes | Orel Hershiser | Mark Davis | 486 | 474 | 12 |
| 1989-09-09 | @ SDN | 142 | L 1-3 | 66-76 | 5 | 32,539 | John Wetteland | Ed Whitson | Ed Whitson | John Wetteland | Mark Davis | 487 | 477 | 10 |
| 1989-09-10 | @ SDN | 143 | W 14-8 | 67-76 | 5 | 19,342 | Ramon Martinez | Dennis Rasmussen | Ramon Martinez | Dennis Rasmussen | | 501 | 485 | 16 |
| 1989-09-11 | vs CIN | 144 | W 8-2 | 68-76 | 5 | 19,699 | Tim Belcher | Ron Robinson | Tim Belcher | Ron Robinson | | 509 | 487 | 22 |
| 1989-09-12 | vs CIN | 145 | W 5-4 | 69-76 | 5 | 22,606 | Fernando Valenzuela | Tom Browning | Jay Howell | Rob Dibble | | 514 | 491 | 23 |
| 1989-09-13 | vs HOU | 146 | L 1-3 | 69-77 | 5 | 21,715 | Orel Hershiser | Mark Portugal | Mark Portugal | Orel Hershiser | Danny Darwin | 515 | 494 | 21 |
| 1989-09-14 | vs HOU | 147 | L 3-11 | 69-78 | 5 | 13,206 | John Wetteland | Mike Scott | Mike Scott | John Wetteland | | 518 | 505 | 13 |
| 1989-09-15 | vs ATL | 148 | W 5-0 | 70-78 | 5 | 37,405 | Ramon Martinez | Tommy Greene | Ramon Martinez | Tommy Greene | | 523 | 505 | 18 |
| 1989-09-16 | vs ATL | 149 | W 1-0 | 71-78 | 4 | 23,192 | Tim Belcher | Derek Lilliquist | Tim Belcher | Joe Boever | | 524 | 505 | 19 |
| 1989-09-17 | vs ATL | 150 | W 4-3 | 72-78 | 4 | 31,192 | Fernando Valenzuela | Marty Clary | Alejandro Pena | Joe Boever | | 528 | 508 | 20 |
| 1989-09-19 | @ SFN | 151 | L 2-3 | 72-79 | 4 | 20,668 | Orel Hershiser | Mike LaCoss | Mike LaCoss | Orel Hershiser | Steve Bedrosian | 530 | 511 | 19 |
| 1989-09-20 | @ SFN | 152 | L 7-8 | 72-80 | 4 | 21,420 | John Wetteland | Bob Knepper | Trevor Wilson | Mike Hartley | | 537 | 519 | 18 |
| 1989-09-21 | @ SFN | 153 | L 3-4 | 72-81 | 4 | 24,896 | Ramon Martinez | Kelly Downs | Kelly Downs | Ramon Martinez | Steve Bedrosian | 540 | 523 | 17 |
| 1989-09-22 | vs SDN | 154 | W 2-1 | 73-81 | 4 | 24,887 | Tim Belcher | Bruce Hurst | Tim Belcher | Bruce Hurst | | 542 | 524 | 18 |
| 1989-09-23 | vs SDN | 155 | L 1-7 | 73-82 | 4 | 24,348 | Fernando Valenzuela | Calvin Schiraldi | Calvin Schiraldi | Fernando Valenzuela | Greg Harris | 543 | 531 | 12 |
| 1989-09-24 | vs SDN | 156 | L 0-1 | 73-83 | 4 | 37,969 | Orel Hershiser | Andy Benes | Andy Benes | Orel Hershiser | Mark Davis | 543 | 532 | 11 |
| 1989-09-25 | vs SFN | 157 | W 5-2 | 74-83 | 4 | 23,007 | John Wetteland | Don Robinson | John Wetteland | Don Robinson | Alejandro Pena | 548 | 534 | 14 |
| 1989-09-26 | vs SFN | 158 | W 2-1 | 75-83 | 4 | 27,622 | Ramon Martinez | Kelly Downs | Ramon Martinez | Kelly Downs | Jay Howell | 550 | 535 | 15 |
| 1989-09-27 | vs SFN | 159 | W 1-0 | 76-83 | 4 | 34,210 | Tim Belcher | Scott Garrelts | Tim Belcher | Scott Garrelts | | 551 | 535 | 16 |
| 1989-10-01 | @ ATL | 160 | W 3-1 | 77-83 | 4 | 4,840 | Orel Hershiser | Gary Eave | Orel Hershiser | Jay Aldrich | Jay Howell | 554 | 536 | 18 |