| 1989-04-04 | @ HOU | 1 | L 3-10 | 0-1 | 4 | 27,989 | Zane Smith | Mike Scott | Mike Scott | Zane Smith | | 3 | 10 | -7 |
| 1989-04-05 | @ HOU | 2 | W 8-4 | 1-1 | 3 | 12,154 | Pete Smith | Bob Knepper | Jose Alvarez | Bob Knepper | Joe Boever | 11 | 14 | -3 |
| 1989-04-06 | @ HOU | 3 | W 3-2 | 2-1 | 1 | 9,259 | John Smoltz | Jim Deshaies | John Smoltz | Jim Deshaies | Joe Boever | 14 | 16 | -2 |
| 1989-04-07 | vs LAN | 4 | W 6-1 | 3-1 | 1 | 31,929 | Tom Glavine | Fernando Valenzuela | Tom Glavine | Fernando Valenzuela | | 20 | 17 | 3 |
| 1989-04-09 | vs LAN | 5 | L 2-4 | 3-2 | 1 | 17,041 | Zane Smith | Tim Belcher | Alejandro Pena | Mark Eichhorn | Tim Crews | 22 | 21 | 1 |
| 1989-04-10 | @ SDN | 6 | L 2-5 | 3-3 | 3 | 15,749 | Pete Smith | Bruce Hurst | Bruce Hurst | Pete Smith | | 24 | 26 | -2 |
| 1989-04-11 | @ SDN | 7 | L 2-3 | 3-4 | 4 | 14,649 | John Smoltz | Ed Whitson | Ed Whitson | John Smoltz | Mark Davis | 26 | 29 | -3 |
| 1989-04-12 | @ SDN | 8 | W 5-0 | 4-4 | 4 | 14,621 | Tom Glavine | Dennis Rasmussen | Tom Glavine | Dennis Rasmussen | | 31 | 29 | 2 |
| 1989-04-13 | @ SDN | 9 | W 4-1 | 5-4 | 3 | 18,596 | Derek Lilliquist | Walt Terrell | Derek Lilliquist | Walt Terrell | Joe Boever | 35 | 30 | 5 |
| 1989-04-14 | @ SFN | 10 | L 5-7 | 5-5 | 4 | 11,808 | Zane Smith | Rick Reuschel | Rick Reuschel | Zane Smith | Craig Lefferts | 40 | 37 | 3 |
| 1989-04-15 | @ SFN | 11 | L 0-1 | 5-6 | 4 | 29,798 | Pete Smith | Don Robinson | Atlee Hammaker | Pete Smith | | 40 | 38 | 2 |
| 1989-04-16 | @ SFN | 12 | W 7-2 | 6-7 | 3 | 0 | John Smoltz | Kelly Downs | John Smoltz | Kelly Downs | Jose Alvarez | 47 | 40 | 7 |
| 1989-04-16 | @ SFN | 13 | L 1-6 | 6-7 | 3 | 26,048 | Charlie Puleo | Joe Price | Joe Price | Charlie Puleo | | 48 | 46 | 2 |
| 1989-04-18 | vs HOU | 14 | W 5-4 | 7-7 | 3 | 8,758 | Tom Glavine | Rick Rhoden | Joe Boever | Dave Smith | | 53 | 50 | 3 |
| 1989-04-19 | vs HOU | 15 | W 4-3 | 8-7 | 3 | 6,292 | Derek Lilliquist | Jim Clancy | Jose Alvarez | Jim Clancy | Joe Boever | 57 | 53 | 4 |
| 1989-04-20 | vs HOU | 16 | L 3-4 | 8-8 | 3 | 5,568 | Zane Smith | Mike Scott | Danny Darwin | Paul Assenmacher | Dave Smith | 60 | 57 | 3 |
| 1989-04-21 | vs SDN | 17 | L 3-5 | 8-9 | 5 | 14,070 | Pete Smith | Bruce Hurst | Bruce Hurst | Joe Boever | Mark Davis | 63 | 62 | 1 |
| 1989-04-22 | vs SDN | 18 | W 5-1 | 9-9 | 3 | 19,216 | John Smoltz | Ed Whitson | John Smoltz | Ed Whitson | | 68 | 63 | 5 |
| 1989-04-23 | vs SDN | 19 | W 9-4 | 10-9 | 3 | 17,069 | Tom Glavine | Dennis Rasmussen | Tom Glavine | Dennis Rasmussen | | 77 | 67 | 10 |
| 1989-04-24 | vs SDN | 20 | L 2-5 | 10-10 | 3 | 6,936 | Derek Lilliquist | Walt Terrell | Walt Terrell | Derek Lilliquist | Mark Davis | 79 | 72 | 7 |
| 1989-04-25 | @ NYN | 21 | L 1-2 | 10-11 | 5 | 25,452 | Zane Smith | David Cone | David Cone | Zane Smith | Randy Myers | 80 | 74 | 6 |
| 1989-04-26 | @ NYN | 22 | L 1-6 | 10-12 | 5 | 39,665 | Pete Smith | Dwight Gooden | Dwight Gooden | Pete Smith | Randy Myers | 81 | 80 | 1 |
| 1989-04-28 | @ MON | 23 | L 4-10 | 10-13 | 5 | 14,591 | John Smoltz | Kevin Gross | Kevin Gross | John Smoltz | | 85 | 90 | -5 |
| 1989-04-29 | @ MON | 24 | L 7-9 | 10-14 | 5 | 14,261 | Tom Glavine | Bryn Smith | Joe Hesketh | Jim Acker | Tim Burke | 92 | 99 | -7 |
| 1989-04-30 | @ MON | 25 | L 6-9 | 10-15 | 6 | 25,221 | Derek Lilliquist | Brian Holman | Brian Holman | Derek Lilliquist | Tim Burke | 98 | 108 | -10 |
| 1989-05-01 | vs NYN | 26 | L 1-3 | 10-16 | 6 | 8,854 | Zane Smith | Dwight Gooden | Dwight Gooden | Zane Smith | Roger McDowell | 99 | 111 | -12 |
| 1989-05-02 | vs NYN | 27 | L 1-7 | 10-17 | 6 | 12,834 | Pete Smith | Bob Ojeda | Bob Ojeda | Pete Smith | | 100 | 118 | -18 |
| 1989-05-03 | vs PHI | 28 | W 6-3 | 11-17 | 6 | 4,143 | John Smoltz | Don Carman | John Smoltz | Don Carman | | 106 | 121 | -15 |
| 1989-05-04 | vs PHI | 29 | W 3-0 | 12-17 | 6 | 2,047 | Tom Glavine | Mike Maddux | Tom Glavine | Mike Maddux | | 109 | 121 | -12 |
| 1989-05-05 | vs MON | 30 | W 6-1 | 13-17 | 6 | 6,104 | Derek Lilliquist | Bryn Smith | Derek Lilliquist | Bryn Smith | Jose Alvarez | 115 | 122 | -7 |
| 1989-05-06 | vs MON | 31 | W 13-3 | 14-17 | 5 | 15,556 | Zane Smith | Pascual Perez | Zane Smith | Pascual Perez | | 128 | 125 | 3 |
| 1989-05-07 | vs MON | 32 | W 7-1 | 15-17 | 5 | 14,278 | Pete Smith | Randy Johnson | Pete Smith | Randy Johnson | | 135 | 126 | 9 |
| 1989-05-09 | @ PHI | 33 | W 7-2 | 16-17 | 4 | 11,544 | John Smoltz | Don Carman | John Smoltz | Don Carman | | 142 | 128 | 14 |
| 1989-05-11 | @ PHI | 34 | W 8-3 | 17-17 | 3 | 14,841 | Tom Glavine | Mike Maddux | Tom Glavine | Randy O'Neal | | 150 | 131 | 19 |
| 1989-05-12 | @ PIT | 35 | L 2-10 | 17-18 | 4 | 13,378 | Zane Smith | John Smiley | John Smiley | Zane Smith | | 152 | 141 | 11 |
| 1989-05-13 | @ PIT | 36 | L 3-8 | 17-19 | 4 | 15,828 | Pete Smith | Bob Walk | Bob Walk | Pete Smith | | 155 | 149 | 6 |
| 1989-05-14 | @ PIT | 37 | W 5-2 | 18-19 | 3 | 11,403 | John Smoltz | Doug Drabek | John Smoltz | Doug Drabek | Joe Boever | 160 | 151 | 9 |
| 1989-05-15 | @ CHN | 38 | L 0-4 | 18-20 | 5 | 16,920 | Derek Lilliquist | Mike Bielecki | Mike Bielecki | Derek Lilliquist | | 160 | 155 | 5 |
| 1989-05-16 | @ CHN | 39 | L 3-4 | 18-21 | 6 | 24,070 | Tom Glavine | Scott Sanderson | Scott Sanderson | Tom Glavine | Mitch Williams | 163 | 159 | 4 |
| 1989-05-17 | @ CHN | 40 | L 0-4 | 18-22 | 6 | 31,196 | Zane Smith | Jeff Pico | Jeff Pico | Zane Smith | | 163 | 163 | 0 |
| 1989-05-19 | vs SLN | 41 | W 3-2 | 19-22 | 6 | 18,594 | Pete Smith | Ken Hill | Joe Boever | Dan Quisenberry | | 166 | 165 | 1 |
| 1989-05-20 | vs SLN | 42 | L 0-1 | 19-23 | 6 | 26,840 | Derek Lilliquist | Scott Terry | Ken Dayley | Joe Boever | Dan Quisenberry | 166 | 166 | 0 |
| 1989-05-21 | vs SLN | 43 | L 1-6 | 19-24 | 6 | 36,560 | John Smoltz | Jose DeLeon | Frank DiPino | Jose Alvarez | | 167 | 172 | -5 |
| 1989-05-23 | vs PIT | 44 | L 2-5 | 19-25 | 6 | 6,137 | Zane Smith | John Smiley | John Smiley | Zane Smith | | 169 | 177 | -8 |
| 1989-05-24 | vs PIT | 45 | L 1-4 | 19-26 | 6 | 5,896 | Derek Lilliquist | Bob Walk | Bill Landrum | Jim Acker | | 170 | 181 | -11 |
| 1989-05-25 | vs PIT | 46 | L 3-7 | 19-27 | 6 | 5,517 | Pete Smith | Doug Drabek | Doug Drabek | Pete Smith | Bill Landrum | 173 | 188 | -15 |
| 1989-05-26 | @ SLN | 47 | L 0-3 | 19-28 | 6 | 34,818 | John Smoltz | Scott Terry | Scott Terry | John Smoltz | Dan Quisenberry | 173 | 191 | -18 |
| 1989-05-27 | @ SLN | 48 | W 4-1 | 20-28 | 6 | 48,866 | Tom Glavine | Jose DeLeon | Jose Alvarez | Jose DeLeon | Joe Boever | 177 | 192 | -15 |
| 1989-05-28 | @ SLN | 49 | L 3-3 | 20-29 | 6 | 35,832 | Zane Smith | Joe Magrane | | | | 180 | 195 | -15 |
| 1989-05-29 | vs CHN | 50 | W 2-1 | 21-29 | 6 | 15,123 | Derek Lilliquist | Scott Sanderson | Derek Lilliquist | Scott Sanderson | Joe Boever | 182 | 196 | -14 |
| 1989-05-30 | vs CHN | 51 | L 2-3 | 21-30 | 6 | 7,566 | Pete Smith | Greg Maddux | Greg Maddux | Pete Smith | Mitch Williams | 184 | 199 | -15 |
| 1989-05-31 | vs CHN | 52 | W 3-2 | 22-30 | 6 | 7,958 | John Smoltz | Paul Kilgus | John Smoltz | Paul Kilgus | Joe Boever | 187 | 201 | -14 |
| 1989-06-02 | vs SFN | 53 | L 6-7 | 22-31 | 6 | 14,052 | Tom Glavine | Rick Reuschel | Rick Reuschel | Tom Glavine | Rich Gossage | 193 | 208 | -15 |
| 1989-06-03 | vs SFN | 54 | L 0-4 | 22-32 | 6 | 16,181 | Zane Smith | Don Robinson | Atlee Hammaker | Zane Smith | | 193 | 212 | -19 |
| 1989-06-04 | vs SFN | 55 | W 6-3 | 23-32 | 6 | 13,700 | Derek Lilliquist | Mike Krukow | Derek Lilliquist | Mike Krukow | Joe Boever | 199 | 215 | -16 |
| 1989-06-05 | vs LAN | 56 | L 0-7 | 23-34 | 6 | 0 | Pete Smith | Ramon Martinez | Ramon Martinez | Pete Smith | | 199 | 222 | -23 |
| 1989-06-05 | vs LAN | 57 | L 2-5 | 23-34 | 6 | 10,340 | John Smoltz | John Wetteland | Tim Leary | John Smoltz | Jay Howell | 201 | 227 | -26 |
| 1989-06-06 | vs LAN | 58 | W 3-0 | 24-34 | 6 | 7,623 | Tom Glavine | Mike Morgan | Tom Glavine | Mike Morgan | | 204 | 227 | -23 |
| 1989-06-07 | vs LAN | 59 | L 4-5 | 24-35 | 6 | 11,324 | Zane Smith | Fernando Valenzuela | Fernando Valenzuela | Zane Smith | Jay Howell | 208 | 232 | -24 |
| 1989-06-09 | @ HOU | 60 | L 5-6 | 24-36 | 6 | 24,530 | Derek Lilliquist | Bob Forsch | Juan Agosto | Jose Alvarez | Danny Darwin | 213 | 238 | -25 |
| 1989-06-10 | @ HOU | 61 | L 0-1 | 24-37 | 6 | 31,972 | John Smoltz | Jim Clancy | Jim Clancy | John Smoltz | Dave Smith | 213 | 239 | -26 |
| 1989-06-11 | @ HOU | 62 | L 6-10 | 24-38 | 6 | 30,001 | Tom Glavine | Jim Deshaies | Jim Deshaies | Tom Glavine | Danny Darwin | 219 | 249 | -30 |
| 1989-06-13 | @ SFN | 63 | L 2-3 | 24-39 | 6 | 10,484 | Zane Smith | Atlee Hammaker | Atlee Hammaker | Zane Smith | Craig Lefferts | 221 | 252 | -31 |
| 1989-06-14 | @ SFN | 64 | L 1-10 | 24-40 | 6 | 12,140 | Derek Lilliquist | Don Robinson | Don Robinson | Derek Lilliquist | | 222 | 262 | -40 |
| 1989-06-15 | @ SFN | 65 | W 2-1 | 25-40 | 6 | 9,403 | John Smoltz | Scott Garrelts | John Smoltz | Scott Garrelts | | 224 | 263 | -39 |
| 1989-06-16 | @ LAN | 66 | W 6-1 | 26-40 | 6 | 33,372 | Tom Glavine | Tim Leary | Tom Glavine | Tim Leary | | 230 | 264 | -34 |
| 1989-06-17 | @ LAN | 67 | W 2-1 | 27-40 | 6 | 42,940 | Pete Smith | Mike Morgan | Pete Smith | Mike Morgan | Joe Boever | 232 | 265 | -33 |
| 1989-06-18 | @ LAN | 68 | L 3-5 | 27-41 | 6 | 43,050 | Zane Smith | Fernando Valenzuela | Fernando Valenzuela | Zane Smith | Jay Howell | 235 | 270 | -35 |
| 1989-06-21 | vs CIN | 69 | W 4-3 | 29-41 | 6 | 0 | Derek Lilliquist | Tom Browning | Mark Eichhorn | John Franco | | 239 | 273 | -34 |
| 1989-06-21 | vs CIN | 70 | W 1-0 | 29-41 | 6 | 10,247 | John Smoltz | Rick Mahler | John Smoltz | Rick Mahler | Joe Boever | 240 | 273 | -33 |
| 1989-06-22 | vs CIN | 71 | L 1-6 | 29-42 | 6 | 10,203 | Tom Glavine | Scott Scudder | Scott Scudder | Tom Glavine | | 241 | 279 | -38 |
| 1989-06-23 | vs HOU | 72 | L 2-5 | 29-43 | 6 | 12,614 | Pete Smith | Jim Deshaies | Danny Darwin | Paul Assenmacher | Dave Smith | 243 | 284 | -41 |
| 1989-06-24 | vs HOU | 73 | L 4-5 | 29-44 | 6 | 27,944 | Zane Smith | Mike Scott | Mike Scott | Jose Alvarez | Dave Smith | 247 | 289 | -42 |
| 1989-06-25 | vs HOU | 74 | L 6-12 | 29-45 | 6 | 15,698 | Derek Lilliquist | Bob Knepper | Dan Schatzeder | Jim Acker | Danny Darwin | 253 | 301 | -48 |
| 1989-06-27 | @ CIN | 75 | L 3-9 | 29-46 | 6 | 20,227 | John Smoltz | Scott Scudder | Scott Scudder | John Smoltz | | 256 | 310 | -54 |
| 1989-06-28 | @ CIN | 76 | W 4-3 | 30-46 | 6 | 32,855 | Tom Glavine | Jose Rijo | Tom Glavine | Jose Rijo | Joe Boever | 260 | 313 | -53 |
| 1989-06-29 | @ CIN | 77 | W 2-1 | 31-46 | 6 | 25,614 | Marty Clary | Tom Browning | Marty Clary | Rob Dibble | | 262 | 314 | -52 |
| 1989-06-30 | @ PHI | 78 | L 2-4 | 32-47 | 6 | 0 | Zane Smith | Terry Mulholland | Terry Mulholland | Zane Smith | Jeff Parrett | 264 | 318 | -54 |
| 1989-06-30 | @ PHI | 79 | W 3-1 | 32-47 | 6 | 25,586 | Derek Lilliquist | Larry McWilliams | Derek Lilliquist | Larry McWilliams | Joe Boever | 267 | 319 | -52 |
| 1989-07-01 | @ PHI | 80 | L 2-4 | 32-48 | 6 | 33,045 | Pete Smith | Bruce Ruffin | Bruce Ruffin | Pete Smith | Roger McDowell | 269 | 323 | -54 |
| 1989-07-02 | @ PHI | 81 | W 3-1 | 33-48 | 6 | 28,524 | John Smoltz | Dennis Cook | John Smoltz | Dennis Cook | | 272 | 324 | -52 |
| 1989-07-03 | vs MON | 82 | L 0-3 | 33-49 | 6 | 10,555 | Tom Glavine | Mark Langston | Mark Langston | Tom Glavine | | 272 | 327 | -55 |
| 1989-07-04 | vs MON | 83 | W 9-3 | 34-49 | 6 | 27,245 | Marty Clary | Kevin Gross | Marty Clary | Kevin Gross | | 281 | 330 | -49 |
| 1989-07-05 | vs MON | 84 | L 5-7 | 34-50 | 6 | 50,091 | Derek Lilliquist | Dennis Martinez | Dennis Martinez | Mark Eichhorn | Tim Burke | 286 | 337 | -51 |
| 1989-07-06 | vs PHI | 85 | L 0-4 | 34-51 | 6 | 6,544 | Pete Smith | Bruce Ruffin | Bruce Ruffin | Pete Smith | Jeff Parrett | 286 | 341 | -55 |
| 1989-07-07 | vs PHI | 86 | W 5-3 | 35-51 | 6 | 11,450 | John Smoltz | Dennis Cook | John Smoltz | Dennis Cook | Joe Boever | 291 | 344 | -53 |
| 1989-07-08 | vs PHI | 87 | W 4-3 | 36-51 | 6 | 21,337 | Tom Glavine | Ken Howell | Paul Assenmacher | Jeff Parrett | Joe Boever | 295 | 347 | -52 |
| 1989-07-09 | vs PHI | 88 | L 3-4 | 36-52 | 6 | 9,292 | Marty Clary | Terry Mulholland | Jeff Parrett | Joe Boever | | 298 | 351 | -53 |
| 1989-07-13 | vs NYN | 89 | L 1-5 | 36-53 | 6 | 13,690 | Pete Smith | Ron Darling | Ron Darling | Pete Smith | | 299 | 356 | -57 |
| 1989-07-14 | vs NYN | 90 | W 3-2 | 37-53 | 6 | 24,143 | John Smoltz | Sid Fernandez | Joe Boever | Sid Fernandez | | 302 | 358 | -56 |
| 1989-07-15 | vs NYN | 91 | L 4-6 | 37-54 | 6 | 35,542 | Derek Lilliquist | David Cone | Rick Aguilera | Paul Assenmacher | Randy Myers | 306 | 364 | -58 |
| 1989-07-16 | vs NYN | 92 | W 6-2 | 38-54 | 6 | 16,977 | Marty Clary | Bob Ojeda | Marty Clary | Bob Ojeda | | 312 | 366 | -54 |
| 1989-07-17 | @ MON | 93 | L 2-5 | 38-55 | 6 | 35,110 | Tom Glavine | Pascual Perez | Pascual Perez | Tom Glavine | Tim Burke | 314 | 371 | -57 |
| 1989-07-18 | @ MON | 94 | W 7-6 | 39-55 | 6 | 26,259 | Pete Smith | Dennis Martinez | Mark Eichhorn | Steve Frey | Joe Boever | 321 | 377 | -56 |
| 1989-07-19 | @ MON | 95 | W 3-2 | 40-55 | 6 | 20,222 | John Smoltz | Bryn Smith | Mark Eichhorn | Joe Hesketh | Joe Boever | 324 | 379 | -55 |
| 1989-07-20 | @ NYN | 96 | L 1-4 | 40-56 | 6 | 21,376 | Derek Lilliquist | Bob Ojeda | Bob Ojeda | Derek Lilliquist | Rick Aguilera | 325 | 383 | -58 |
| 1989-07-21 | @ NYN | 97 | L 4-6 | 40-57 | 6 | 31,969 | Marty Clary | Ron Darling | Ron Darling | Marty Clary | Randy Myers | 329 | 389 | -60 |
| 1989-07-22 | @ NYN | 98 | L 5-7 | 40-58 | 6 | 49,142 | Tom Glavine | Sid Fernandez | Rick Aguilera | Jim Acker | Randy Myers | 334 | 396 | -62 |
| 1989-07-23 | @ NYN | 99 | L 2-7 | 40-59 | 6 | 45,226 | Sergio Valdez | David Cone | David Cone | Sergio Valdez | | 336 | 403 | -67 |
| 1989-07-24 | vs SFN | 100 | L 0-2 | 40-60 | 6 | 12,985 | John Smoltz | Rick Reuschel | Rick Reuschel | John Smoltz | Steve Bedrosian | 336 | 405 | -69 |
| 1989-07-25 | vs SFN | 101 | L 4-5 | 40-61 | 6 | 10,564 | Derek Lilliquist | Mike LaCoss | Mike LaCoss | Derek Lilliquist | Craig Lefferts | 340 | 410 | -70 |
| 1989-07-26 | vs SFN | 102 | W 5-4 | 41-61 | 6 | 8,055 | Marty Clary | Scott Garrelts | Joe Boever | Steve Bedrosian | | 345 | 414 | -69 |
| 1989-07-27 | vs SFN | 103 | W 10-1 | 42-61 | 6 | 10,471 | Tom Glavine | Atlee Hammaker | Tom Glavine | Atlee Hammaker | | 355 | 415 | -60 |
| 1989-07-28 | vs CIN | 104 | L 2-4 | 42-62 | 6 | 18,883 | Pete Smith | Ron Robinson | Norm Charlton | Sergio Valdez | Bob Sebra | 357 | 419 | -62 |
| 1989-07-29 | vs CIN | 105 | L 1-4 | 42-63 | 6 | 31,470 | John Smoltz | Tom Browning | Tom Browning | John Smoltz | John Franco | 358 | 423 | -65 |
| 1989-07-30 | vs CIN | 106 | W 5-2 | 43-63 | 6 | 14,177 | Derek Lilliquist | Rick Mahler | Derek Lilliquist | Rick Mahler | Joe Boever | 363 | 425 | -62 |
| 1989-08-01 | vs SDN | 107 | L 2-5 | 43-64 | 6 | 8,363 | Marty Clary | Dennis Rasmussen | Mark Grant | Jim Acker | Mark Davis | 365 | 430 | -65 |
| 1989-08-02 | vs SDN | 108 | L 7-9 | 43-65 | 6 | 6,967 | Tom Glavine | Bruce Hurst | Bruce Hurst | Mark Eichhorn | Mark Davis | 372 | 439 | -67 |
| 1989-08-03 | vs SDN | 109 | L 5-6 | 43-66 | 6 | 12,357 | John Smoltz | Don Schulze | Don Schulze | John Smoltz | Mark Davis | 377 | 445 | -68 |
| 1989-08-04 | @ CIN | 110 | L 4-5 | 43-67 | 6 | 32,531 | Pete Smith | Rick Mahler | John Franco | Joe Boever | | 381 | 450 | -69 |
| 1989-08-05 | @ CIN | 111 | W 7-1 | 44-67 | 6 | 29,882 | Derek Lilliquist | Scott Scudder | Derek Lilliquist | Scott Scudder | | 388 | 451 | -63 |
| 1989-08-06 | @ CIN | 112 | L 2-3 | 44-68 | 6 | 38,077 | Marty Clary | Tim Leary | Norm Charlton | Joe Boever | | 390 | 454 | -64 |
| 1989-08-07 | @ LAN | 113 | W 1-0 | 45-68 | 6 | 27,284 | Tom Glavine | Ramon Martinez | Tom Glavine | Ramon Martinez | | 391 | 454 | -63 |
| 1989-08-08 | @ LAN | 114 | L 2-10 | 45-69 | 6 | 30,713 | John Smoltz | Orel Hershiser | Orel Hershiser | John Smoltz | | 393 | 464 | -71 |
| 1989-08-09 | @ LAN | 115 | W 6-3 | 46-69 | 6 | 41,328 | Pete Smith | John Wetteland | Pete Smith | John Wetteland | Jim Acker | 399 | 467 | -68 |
| 1989-08-11 | @ SDN | 116 | W 6-5 | 47-70 | 6 | 0 | Derek Lilliquist | Andy Benes | Mark Eichhorn | Andy Benes | Joe Boever | 405 | 472 | -67 |
| 1989-08-11 | @ SDN | 117 | L 0-2 | 47-70 | 6 | 27,563 | Marty Clary | Dennis Rasmussen | Dennis Rasmussen | Marty Clary | Mark Davis | 405 | 474 | -69 |
| 1989-08-12 | @ SDN | 118 | W 5-4 | 48-70 | 6 | 21,657 | Tom Glavine | Bruce Hurst | Tom Glavine | Bruce Hurst | Jim Acker | 410 | 478 | -68 |
| 1989-08-14 | @ SLN | 119 | L 4-7 | 48-72 | 6 | 0 | John Smoltz | Joe Magrane | Joe Magrane | John Smoltz | Todd Worrell | 414 | 485 | -71 |
| 1989-08-14 | @ SLN | 120 | L 2-5 | 48-72 | 6 | 39,186 | Pete Smith | Ricky Horton | John Costello | Pete Smith | Ken Dayley | 416 | 490 | -74 |
| 1989-08-15 | @ SLN | 121 | L 1-9 | 48-73 | 6 | 39,970 | Derek Lilliquist | Jose DeLeon | Jose DeLeon | Derek Lilliquist | | 417 | 499 | -82 |
| 1989-08-16 | @ SLN | 122 | L 2-3 | 48-74 | 6 | 42,989 | Marty Clary | Ted Power | Frank DiPino | Jim Acker | Todd Worrell | 419 | 502 | -83 |
| 1989-08-18 | vs PIT | 123 | W 13-6 | 49-74 | 6 | 17,154 | Tom Glavine | Bob Walk | Tom Glavine | Bob Walk | | 432 | 508 | -76 |
| 1989-08-19 | vs PIT | 124 | W 4-3 | 50-74 | 6 | 27,034 | John Smoltz | Doug Drabek | John Smoltz | Doug Drabek | Joe Boever | 436 | 511 | -75 |
| 1989-08-20 | vs PIT | 125 | L 6-7 | 50-75 | 6 | 9,222 | Pete Smith | Rick Reed | Rick Reed | Pete Smith | Bill Landrum | 442 | 518 | -76 |
| 1989-08-22 | vs SLN | 126 | L 5-10 | 50-76 | 6 | 9,117 | Derek Lilliquist | Ted Power | Ted Power | Derek Lilliquist | | 447 | 528 | -81 |
| 1989-08-23 | vs SLN | 127 | W 3-0 | 51-76 | 6 | 7,792 | Marty Clary | Ricky Horton | Marty Clary | Ricky Horton | | 450 | 528 | -78 |
| 1989-08-24 | vs SLN | 128 | L 1-4 | 51-77 | 6 | 8,174 | Tom Glavine | Joe Magrane | Joe Magrane | Tom Glavine | | 451 | 532 | -81 |
| 1989-08-25 | @ CHN | 129 | L 3-4 | 51-78 | 6 | 35,456 | John Smoltz | Mike Bielecki | Mitch Williams | Mark Eichhorn | | 454 | 536 | -82 |
| 1989-08-26 | @ CHN | 130 | W 5-3 | 52-78 | 6 | 35,752 | Derek Lilliquist | Rick Sutcliffe | Sergio Valdez | Rick Sutcliffe | Joe Boever | 459 | 539 | -80 |
| 1989-08-27 | @ CHN | 131 | L 2-3 | 52-79 | 6 | 35,107 | Marty Clary | Steve Wilson | Mitch Williams | Mark Eichhorn | | 461 | 542 | -81 |
| 1989-08-28 | @ PIT | 132 | W 5-2 | 53-79 | 6 | 9,854 | Pete Smith | Bob Walk | Pete Smith | Bob Walk | Mike Stanton | 466 | 544 | -78 |
| 1989-08-29 | @ PIT | 133 | L 4-5 | 53-80 | 6 | 9,686 | Tom Glavine | Doug Drabek | Doug Drabek | Tom Glavine | Bill Landrum | 470 | 549 | -79 |
| 1989-08-30 | @ PIT | 134 | L 5-7 | 53-81 | 6 | 8,314 | John Smoltz | Jeff Robinson | Randy Kramer | Joe Boever | Bill Landrum | 475 | 556 | -81 |
| 1989-09-01 | vs CHN | 135 | W 5-1 | 54-81 | 6 | 14,255 | Derek Lilliquist | Steve Wilson | Derek Lilliquist | Steve Wilson | Mike Stanton | 480 | 557 | -77 |
| 1989-09-02 | vs CHN | 136 | L 3-10 | 54-82 | 6 | 41,020 | Marty Clary | Greg Maddux | Greg Maddux | Marty Clary | | 483 | 567 | -84 |
| 1989-09-03 | vs CHN | 137 | W 8-5 | 55-82 | 6 | 25,189 | Pete Smith | Mike Bielecki | Pete Smith | Mike Bielecki | Mike Stanton | 491 | 572 | -81 |
| 1989-09-04 | vs SDN | 138 | L 9-10 | 55-83 | 6 | 5,332 | Tom Glavine | Ed Whitson | Pat Clements | Joe Boever | Mark Davis | 500 | 582 | -82 |
| 1989-09-05 | vs SDN | 139 | L 5-7 | 55-84 | 6 | 1,528 | John Smoltz | Dennis Rasmussen | Mark Grant | Joe Boever | Mark Davis | 505 | 589 | -84 |
| 1989-09-06 | vs SFN | 140 | L 2-7 | 55-85 | 6 | 2,735 | Derek Lilliquist | Scott Garrelts | Scott Garrelts | Derek Lilliquist | | 507 | 596 | -89 |
| 1989-09-07 | vs SFN | 141 | L 5-7 | 55-86 | 6 | 4,474 | Marty Clary | Rick Reuschel | Steve Bedrosian | Mike Stanton | | 512 | 603 | -91 |
| 1989-09-08 | @ CIN | 142 | L 1-5 | 55-87 | 6 | 18,044 | Pete Smith | Scott Scudder | Scott Scudder | Pete Smith | | 513 | 608 | -95 |
| 1989-09-09 | @ CIN | 143 | W 2-1 | 56-87 | 6 | 18,082 | Tom Glavine | Tim Leary | Tom Glavine | Tim Leary | Dwayne Henry | 515 | 609 | -94 |
| 1989-09-10 | @ CIN | 144 | L 4-5 | 56-88 | 6 | 12,779 | Tommy Greene | Jack Armstrong | John Franco | Dwayne Henry | | 519 | 614 | -95 |
| 1989-09-11 | @ SFN | 145 | L 2-3 | 56-89 | 6 | 11,930 | Derek Lilliquist | Scott Garrelts | Scott Garrelts | Tony Castillo | Steve Bedrosian | 521 | 617 | -96 |
| 1989-09-12 | @ SFN | 146 | W 6-5 | 57-89 | 6 | 11,077 | Marty Clary | Rick Reuschel | Jay Aldrich | Steve Bedrosian | Mike Stanton | 527 | 622 | -95 |
| 1989-09-13 | @ SDN | 147 | L 2-3 | 57-90 | 6 | 14,541 | Pete Smith | Andy Benes | Mark Davis | Dwayne Henry | | 529 | 625 | -96 |
| 1989-09-14 | @ SDN | 148 | W 13-4 | 58-90 | 6 | 23,394 | Tom Glavine | Ed Whitson | Tom Glavine | Ed Whitson | | 542 | 629 | -87 |
| 1989-09-15 | @ LAN | 149 | L 0-5 | 58-91 | 6 | 37,405 | Tommy Greene | Ramon Martinez | Ramon Martinez | Tommy Greene | | 542 | 634 | -92 |
| 1989-09-16 | @ LAN | 150 | L 0-1 | 58-92 | 6 | 23,192 | Derek Lilliquist | Tim Belcher | Tim Belcher | Joe Boever | | 542 | 635 | -93 |
| 1989-09-17 | @ LAN | 151 | L 3-4 | 58-93 | 6 | 31,192 | Marty Clary | Fernando Valenzuela | Alejandro Pena | Joe Boever | | 545 | 639 | -94 |
| 1989-09-19 | vs HOU | 152 | W 3-0 | 59-93 | 6 | 3,425 | Gary Eave | Mike Scott | Gary Eave | Mike Scott | Mike Stanton | 548 | 639 | -91 |
| 1989-09-20 | vs HOU | 153 | L 6-7 | 59-94 | 6 | 2,794 | Rusty Richards | Rick Rhoden | Larry Andersen | Joe Boever | Brian Meyer | 554 | 646 | -92 |
| 1989-09-21 | vs HOU | 154 | W 3-0 | 60-94 | 6 | 2,117 | Tommy Greene | Jim Deshaies | Tommy Greene | Jim Deshaies | | 557 | 646 | -89 |
| 1989-09-22 | vs CIN | 155 | L 3-8 | 60-95 | 6 | 4,273 | Derek Lilliquist | Ron Robinson | Ron Robinson | Derek Lilliquist | | 560 | 654 | -94 |
| 1989-09-23 | vs CIN | 156 | L 5-11 | 60-96 | 6 | 7,674 | Marty Clary | Tom Browning | Norm Charlton | Jay Aldrich | | 565 | 665 | -100 |
| 1989-09-24 | vs CIN | 157 | W 6-2 | 61-96 | 6 | 4,689 | Gary Eave | Scott Scudder | Gary Eave | Scott Scudder | | 571 | 667 | -96 |
| 1989-09-25 | @ HOU | 158 | W 5-3 | 62-96 | 6 | 18,547 | Rusty Richards | Jose Cano | Charlie Puleo | Dan Schatzeder | Mike Stanton | 576 | 670 | -94 |
| 1989-09-26 | @ HOU | 159 | L 2-3 | 62-97 | 6 | 13,063 | Tommy Greene | Jim Deshaies | Jim Deshaies | Tommy Greene | Danny Darwin | 578 | 673 | -95 |
| 1989-09-27 | @ HOU | 160 | W 5-4 | 63-97 | 6 | 12,338 | Kent Mercker | Mark Portugal | Mark Eichhorn | Jim Clancy | Mike Stanton | 583 | 677 | -94 |
| 1989-10-01 | vs LAN | 161 | L 1-3 | 63-98 | 6 | 4,840 | Gary Eave | Orel Hershiser | Orel Hershiser | Jay Aldrich | Jay Howell | 584 | 680 | -96 |