| 1990-04-11 | vs SFN | 1 | L 0-8 | 1-1 | 3 | 0 | Tom Glavine | Rick Reuschel | Rick Reuschel | Tom Glavine | | 0 | 8 | -8 |
| 1990-04-11 | vs SFN | 2 | W 4-3 | 1-1 | 3 | 11,082 | Pete Smith | Russ Swan | Pete Smith | Russ Swan | Mike Stanton | 4 | 11 | -7 |
| 1990-04-12 | vs SFN | 3 | L 4-13 | 1-2 | 5 | 6,425 | John Smoltz | Mike LaCoss | Mike LaCoss | John Smoltz | Jeff Brantley | 8 | 24 | -16 |
| 1990-04-13 | vs CIN | 4 | L 2-5 | 1-3 | 5 | 12,364 | Derek Lilliquist | Tom Browning | Tom Browning | Derek Lilliquist | Randy Myers | 10 | 29 | -19 |
| 1990-04-15 | vs CIN | 5 | L 6-13 | 1-4 | 5 | 10,067 | Tom Glavine | Rick Mahler | Tim Birtsas | Tom Glavine | | 16 | 42 | -26 |
| 1990-04-16 | vs CIN | 6 | L 3-5 | 1-5 | 5 | 6,484 | Pete Smith | Jack Armstrong | Jack Armstrong | Pete Smith | Rob Dibble | 19 | 47 | -28 |
| 1990-04-17 | @ HOU | 7 | L 3-5 | 1-6 | 6 | 9,555 | John Smoltz | Mark Portugal | Mark Portugal | John Smoltz | Dave Smith | 22 | 52 | -30 |
| 1990-04-18 | @ HOU | 8 | L 5-10 | 1-7 | 6 | 10,137 | Derek Lilliquist | Bill Gullickson | Dan Schatzeder | Derek Lilliquist | | 27 | 62 | -35 |
| 1990-04-21 | @ CIN | 9 | L 1-8 | 1-8 | 6 | 24,091 | Marty Clary | Jack Armstrong | Jack Armstrong | Marty Clary | | 28 | 70 | -42 |
| 1990-04-22 | @ CIN | 10 | W 3-1 | 2-8 | 6 | 29,299 | Tom Glavine | Tom Browning | Tom Glavine | Tom Browning | Mike Stanton | 31 | 71 | -40 |
| 1990-04-24 | @ NYN | 11 | L 1-2 | 2-9 | 6 | 22,553 | Pete Smith | Dwight Gooden | Julio Machado | Mike Stanton | | 32 | 73 | -41 |
| 1990-04-25 | @ NYN | 12 | L 5-8 | 2-10 | 6 | 19,935 | John Smoltz | David Cone | Ron Darling | Mike Stanton | John Franco | 37 | 81 | -44 |
| 1990-04-26 | vs HOU | 13 | L 0-3 | 2-11 | 6 | 3,415 | Derek Lilliquist | Jim Clancy | Jim Clancy | Derek Lilliquist | Dave Smith | 37 | 84 | -47 |
| 1990-04-27 | vs PHI | 14 | L 1-7 | 2-12 | 6 | 12,598 | Marty Clary | Dennis Cook | Dennis Cook | Mike Stanton | | 38 | 91 | -53 |
| 1990-04-28 | vs PHI | 15 | L 1-2 | 2-13 | 6 | 12,659 | Tom Glavine | Terry Mulholland | Jeff Parrett | Joe Boever | Roger McDowell | 39 | 93 | -54 |
| 1990-04-29 | vs PHI | 16 | W 3-1 | 3-13 | 6 | 11,966 | Pete Smith | Pat Combs | Pete Smith | Pat Combs | | 42 | 94 | -52 |
| 1990-04-30 | vs NYN | 17 | W 7-4 | 4-13 | 6 | 8,232 | John Smoltz | David Cone | John Smoltz | David Cone | Joe Boever | 49 | 98 | -49 |
| 1990-05-01 | vs NYN | 18 | W 5-2 | 5-13 | 6 | 8,324 | Derek Lilliquist | Ron Darling | Derek Lilliquist | Ron Darling | Charlie Kerfeld | 54 | 100 | -46 |
| 1990-05-02 | @ MON | 19 | W 8-1 | 6-13 | 6 | 9,575 | Marty Clary | Zane Smith | Marty Clary | Zane Smith | | 62 | 101 | -39 |
| 1990-05-03 | @ MON | 20 | W 4-1 | 7-13 | 6 | 9,057 | Tom Glavine | Oil Can Boyd | Charlie Kerfeld | Drew Hall | Joe Boever | 66 | 102 | -36 |
| 1990-05-06 | @ PIT | 21 | L 4-6 | 7-15 | 6 | 0 | John Smoltz | Neal Heaton | Neal Heaton | John Smoltz | Scott Ruskin | 70 | 108 | -38 |
| 1990-05-06 | @ PIT | 22 | L 2-4 | 7-15 | 6 | 17,108 | Derek Lilliquist | Doug Drabek | Doug Drabek | Derek Lilliquist | Bob Patterson | 72 | 112 | -40 |
| 1990-05-07 | @ CHN | 23 | W 9-8 | 8-15 | 5 | 32,266 | Marty Clary | Mike Harkey | Charlie Kerfeld | Mitch Williams | Joe Boever | 81 | 120 | -39 |
| 1990-05-08 | @ CHN | 24 | L 8-10 | 8-16 | 5 | 18,503 | Tom Glavine | Steve Wilson | Bill Long | Dwayne Henry | | 89 | 130 | -41 |
| 1990-05-09 | @ CHN | 25 | L 0-4 | 8-17 | 6 | 14,266 | Pete Smith | Les Lancaster | Les Lancaster | Pete Smith | | 89 | 134 | -45 |
| 1990-05-11 | @ SLN | 26 | L 2-5 | 8-18 | 6 | 41,408 | John Smoltz | Bryn Smith | Bryn Smith | John Smoltz | Lee Smith | 91 | 139 | -48 |
| 1990-05-12 | @ SLN | 27 | L 3-4 | 8-19 | 6 | 30,068 | Derek Lilliquist | Jose DeLeon | Lee Smith | Joe Boever | | 94 | 143 | -49 |
| 1990-05-13 | @ SLN | 28 | W 3-1 | 9-19 | 6 | 29,022 | Marty Clary | Greg Mathews | Tony Castillo | Scott Terry | Joe Boever | 97 | 144 | -47 |
| 1990-05-14 | vs CHN | 29 | W 3-2 | 10-19 | 6 | 16,417 | Tom Glavine | Les Lancaster | Dwayne Henry | Mitch Williams | Charlie Kerfeld | 100 | 146 | -46 |
| 1990-05-15 | vs CHN | 30 | L 2-12 | 10-20 | 6 | 16,271 | Pete Smith | Jeff Pico | Jeff Pico | Pete Smith | | 102 | 158 | -56 |
| 1990-05-16 | vs CHN | 31 | W 4-0 | 11-20 | 6 | 13,345 | John Smoltz | Greg Maddux | John Smoltz | Greg Maddux | | 106 | 158 | -52 |
| 1990-05-17 | vs PIT | 32 | W 6-1 | 12-20 | 6 | 6,340 | Derek Lilliquist | Neal Heaton | Derek Lilliquist | Neal Heaton | Joe Hesketh | 112 | 159 | -47 |
| 1990-05-18 | vs PIT | 33 | L 3-9 | 12-21 | 6 | 19,001 | Marty Clary | Bob Walk | Bob Walk | Marty Clary | | 115 | 168 | -53 |
| 1990-05-19 | vs PIT | 34 | W 2-1 | 13-21 | 5 | 26,170 | Tom Glavine | Walt Terrell | Tom Glavine | Walt Terrell | Joe Hesketh | 117 | 169 | -52 |
| 1990-05-20 | vs PIT | 35 | W 13-11 | 14-21 | 5 | 8,288 | Pete Smith | Bob Kipper | Pete Smith | Bob Kipper | Joe Boever | 130 | 180 | -50 |
| 1990-05-21 | vs SLN | 36 | W 6-5 | 15-21 | 4 | 6,237 | John Smoltz | Bryn Smith | Joe Boever | Scott Terry | | 136 | 185 | -49 |
| 1990-05-22 | vs SLN | 37 | L 3-4 | 15-22 | 4 | 11,313 | Derek Lilliquist | Jose DeLeon | Jose DeLeon | Derek Lilliquist | Lee Smith | 139 | 189 | -50 |
| 1990-05-24 | @ PHI | 38 | L 4-8 | 15-23 | 4 | 21,160 | Marty Clary | Bruce Ruffin | Bruce Ruffin | Marty Clary | Marvin Freeman | 143 | 197 | -54 |
| 1990-05-25 | @ PHI | 39 | L 4-5 | 15-24 | 5 | 22,162 | Tom Glavine | Dennis Cook | Jeff Parrett | Joe Hesketh | Roger McDowell | 147 | 202 | -55 |
| 1990-05-26 | @ PHI | 40 | W 12-3 | 16-24 | 5 | 56,789 | Pete Smith | Pat Combs | Pete Smith | Pat Combs | | 159 | 205 | -46 |
| 1990-05-27 | @ PHI | 41 | W 6-1 | 17-24 | 4 | 27,139 | John Smoltz | Terry Mulholland | John Smoltz | Terry Mulholland | | 165 | 206 | -41 |
| 1990-05-28 | vs MON | 42 | L 1-4 | 17-25 | 5 | 25,152 | Derek Lilliquist | Oil Can Boyd | Kevin Gross | Derek Lilliquist | | 166 | 210 | -44 |
| 1990-05-30 | vs MON | 43 | L 6-9 | 17-26 | 6 | 10,372 | Tom Glavine | Bill Sampen | Dave J. Schmidt | Tom Glavine | Drew Hall | 172 | 219 | -47 |
| 1990-05-31 | @ SDN | 44 | L 1-2 | 17-27 | 6 | 13,644 | Pete Smith | Dennis Rasmussen | Dennis Rasmussen | Pete Smith | Greg Harris | 173 | 221 | -48 |
| 1990-06-01 | @ SDN | 45 | W 16-11 | 18-27 | 6 | 22,291 | John Smoltz | Mike Dunne | Tony Castillo | Mike Dunne | | 189 | 232 | -43 |
| 1990-06-02 | @ SDN | 46 | L 0-9 | 18-28 | 6 | 53,701 | Derek Lilliquist | Ed Whitson | Ed Whitson | Derek Lilliquist | | 189 | 241 | -52 |
| 1990-06-03 | @ SDN | 47 | W 4-2 | 19-28 | 5 | 17,151 | Charlie Leibrandt | Bruce Hurst | Charlie Kerfeld | Greg Harris | Joe Boever | 193 | 243 | -50 |
| 1990-06-04 | @ LAN | 48 | L 0-6 | 19-29 | 5 | 22,098 | Tom Glavine | Ramon Martinez | Ramon Martinez | Tom Glavine | | 193 | 249 | -56 |
| 1990-06-05 | @ LAN | 49 | W 6-4 | 20-29 | 5 | 29,878 | Pete Smith | Mike Morgan | Pete Smith | Mike Morgan | | 199 | 253 | -54 |
| 1990-06-06 | @ LAN | 50 | L 5-7 | 20-30 | 5 | 25,274 | John Smoltz | Mike Maddux | Jay Howell | Charlie Kerfeld | | 204 | 260 | -56 |
| 1990-06-08 | vs SFN | 51 | L 8-23 | 20-31 | 5 | 32,154 | Derek Lilliquist | Bob Knepper | Trevor Wilson | Derek Lilliquist | Mark Thurmond | 212 | 283 | -71 |
| 1990-06-09 | vs SFN | 52 | W 5-3 | 21-31 | 5 | 31,048 | Charlie Leibrandt | Atlee Hammaker | Charlie Leibrandt | Atlee Hammaker | | 217 | 286 | -69 |
| 1990-06-10 | vs SFN | 53 | L 3-9 | 21-32 | 6 | 17,448 | Pete Smith | John Burkett | John Burkett | Pete Smith | | 220 | 295 | -75 |
| 1990-06-11 | vs SFN | 54 | L 3-8 | 21-33 | 6 | 11,528 | John Smoltz | Scott Garrelts | Scott Garrelts | John Smoltz | | 223 | 303 | -80 |
| 1990-06-12 | @ CIN | 55 | W 8-3 | 23-33 | 6 | 0 | Tom Glavine | Danny Jackson | Tom Glavine | Danny Jackson | | 231 | 306 | -75 |
| 1990-06-12 | @ CIN | 56 | W 3-2 | 23-33 | 6 | 31,918 | Tommy Greene | Jose Rijo | Tommy Greene | Jose Rijo | Rick Luecken | 234 | 308 | -74 |
| 1990-06-13 | @ CIN | 57 | L 4-13 | 23-34 | 6 | 23,567 | Steve Avery | Tom Browning | Tom Browning | Steve Avery | | 238 | 321 | -83 |
| 1990-06-14 | @ CIN | 58 | L 3-4 | 23-35 | 6 | 19,847 | Charlie Leibrandt | Rick Mahler | Rob Dibble | Joe Boever | | 241 | 325 | -84 |
| 1990-06-15 | @ SFN | 59 | L 2-8 | 23-36 | 6 | 18,882 | Pete Smith | John Burkett | John Burkett | Pete Smith | | 243 | 333 | -90 |
| 1990-06-16 | @ SFN | 60 | L 0-7 | 23-37 | 6 | 27,597 | John Smoltz | Scott Garrelts | Scott Garrelts | John Smoltz | | 243 | 340 | -97 |
| 1990-06-17 | @ SFN | 61 | L 7-9 | 23-38 | 6 | 43,080 | Tom Glavine | Don Robinson | Steve Bedrosian | Tony Castillo | | 250 | 349 | -99 |
| 1990-06-19 | vs CIN | 62 | L 2-4 | 24-39 | 6 | 0 | Steve Avery | Tom Browning | Norm Charlton | Rick Luecken | Randy Myers | 252 | 353 | -101 |
| 1990-06-19 | vs CIN | 63 | W 3-0 | 24-39 | 6 | 16,205 | Charlie Leibrandt | Rick Mahler | Charlie Leibrandt | Rick Mahler | | 255 | 353 | -98 |
| 1990-06-20 | vs CIN | 64 | L 8-9 | 24-40 | 6 | 12,200 | Tommy Greene | Jack Armstrong | Randy Myers | Rick Luecken | | 263 | 362 | -99 |
| 1990-06-21 | vs CIN | 65 | W 4-3 | 25-40 | 6 | 11,204 | John Smoltz | Danny Jackson | John Smoltz | Rob Dibble | | 267 | 365 | -98 |
| 1990-06-23 | vs SDN | 66 | L 5-7 | 25-41 | 6 | 23,724 | Tom Glavine | Ed Whitson | Ed Whitson | Tom Glavine | Craig Lefferts | 272 | 372 | -100 |
| 1990-06-24 | vs SDN | 67 | W 11-10 | 26-41 | 6 | 16,298 | Pete Smith | Bruce Hurst | Rick Luecken | Craig Lefferts | | 283 | 382 | -99 |
| 1990-06-25 | vs LAN | 68 | L 2-5 | 26-42 | 6 | 15,738 | Charlie Leibrandt | Ramon Martinez | Ramon Martinez | Charlie Leibrandt | | 285 | 387 | -102 |
| 1990-06-26 | vs LAN | 69 | W 4-2 | 27-42 | 6 | 12,257 | Steve Avery | Mike Morgan | Steve Avery | Mike Morgan | Joe Hesketh | 289 | 389 | -100 |
| 1990-06-27 | vs LAN | 70 | W 4-0 | 28-42 | 6 | 11,569 | John Smoltz | Tim Belcher | John Smoltz | Tim Belcher | | 293 | 389 | -96 |
| 1990-06-29 | @ MON | 71 | W 4-2 | 29-42 | 6 | 14,210 | Tom Glavine | Dennis Martinez | Tom Glavine | Dennis Martinez | Joe Hesketh | 297 | 391 | -94 |
| 1990-06-30 | @ MON | 72 | W 7-6 | 30-42 | 6 | 16,514 | Charlie Leibrandt | Mark Gardner | Charlie Leibrandt | Mark Gardner | Joe Hesketh | 304 | 397 | -93 |
| 1990-07-01 | @ MON | 73 | L 1-5 | 30-43 | 6 | 27,763 | Steve Avery | Oil Can Boyd | Oil Can Boyd | Steve Avery | | 305 | 402 | -97 |
| 1990-07-02 | @ MON | 74 | W 6-3 | 31-43 | 5 | 14,425 | John Smoltz | Howard Farmer | John Smoltz | Howard Farmer | Joe Boever | 311 | 405 | -94 |
| 1990-07-03 | @ PHI | 75 | L 1-5 | 31-44 | 5 | 55,147 | Marty Clary | Jeff Parrett | Jeff Parrett | Marty Clary | Dennis Cook | 312 | 410 | -98 |
| 1990-07-04 | @ PHI | 76 | W 4-1 | 32-44 | 5 | 18,286 | Tom Glavine | Pat Combs | Tom Glavine | Pat Combs | Joe Boever | 316 | 411 | -95 |
| 1990-07-05 | vs NYN | 77 | L 8-9 | 32-45 | 5 | 34,312 | Charlie Leibrandt | Bob Ojeda | Wally Whitehurst | Joe Hesketh | John Franco | 324 | 420 | -96 |
| 1990-07-06 | vs NYN | 78 | L 7-10 | 32-46 | 5 | 26,513 | Steve Avery | David Cone | David Cone | Steve Avery | | 331 | 430 | -99 |
| 1990-07-07 | vs NYN | 79 | W 4-3 | 33-46 | 5 | 38,267 | John Smoltz | Sid Fernandez | Kent Mercker | Jeff Innis | | 335 | 433 | -98 |
| 1990-07-08 | vs NYN | 80 | L 1-2 | 33-47 | 5 | 15,866 | Marty Clary | Frank Viola | Frank Viola | Marty Clary | John Franco | 336 | 435 | -99 |
| 1990-07-12 | vs MON | 81 | L 0-3 | 33-48 | 5 | 7,654 | Tom Glavine | Mark Gardner | Mark Gardner | Tom Glavine | | 336 | 438 | -102 |
| 1990-07-14 | vs MON | 82 | W 3-2 | 34-49 | 5 | 0 | John Smoltz | Dennis Martinez | Kent Mercker | Dave J. Schmidt | | 339 | 440 | -101 |
| 1990-07-14 | vs MON | 83 | L 2-6 | 34-49 | 5 | 20,452 | Charlie Leibrandt | Oil Can Boyd | Oil Can Boyd | Charlie Leibrandt | Dale Mohorcic | 341 | 446 | -105 |
| 1990-07-15 | vs MON | 84 | L 14-16 | 34-50 | 5 | 11,237 | Steve Avery | Bill Sampen | Steve Frey | Kent Mercker | Dave J. Schmidt | 355 | 462 | -107 |
| 1990-07-16 | vs PHI | 85 | L 2-7 | 34-51 | 6 | 8,211 | Marty Clary | Terry Mulholland | Terry Mulholland | Marty Clary | | 357 | 469 | -112 |
| 1990-07-17 | vs PHI | 86 | W 14-10 | 35-51 | 5 | 8,558 | Tom Glavine | Bruce Ruffin | Tom Glavine | Bruce Ruffin | Kent Mercker | 371 | 479 | -108 |
| 1990-07-18 | vs PHI | 87 | L 3-4 | 35-52 | 6 | 8,706 | John Smoltz | Jose De Jesus | Dennis Cook | John Smoltz | Darrel Akerfelds | 374 | 483 | -109 |
| 1990-07-19 | @ NYN | 88 | L 2-6 | 35-53 | 6 | 39,678 | Charlie Leibrandt | David Cone | David Cone | Charlie Leibrandt | John Franco | 376 | 489 | -113 |
| 1990-07-20 | @ NYN | 89 | L 1-6 | 35-54 | 6 | 36,096 | Steve Avery | Sid Fernandez | Sid Fernandez | Steve Avery | Alejandro Pena | 377 | 495 | -118 |
| 1990-07-21 | @ NYN | 90 | L 2-4 | 35-55 | 6 | 37,779 | Marty Clary | Ron Darling | Ron Darling | Marty Clary | John Franco | 379 | 499 | -120 |
| 1990-07-22 | @ NYN | 91 | W 3-2 | 36-55 | 6 | 48,050 | Tom Glavine | Dwight Gooden | Kent Mercker | Jeff Innis | | 382 | 501 | -119 |
| 1990-07-23 | vs HOU | 92 | W 3-1 | 37-55 | 6 | 7,888 | John Smoltz | Mike Scott | John Smoltz | Mike Scott | | 385 | 502 | -117 |
| 1990-07-24 | vs HOU | 93 | W 9-3 | 39-55 | 5 | 0 | Charlie Leibrandt | Jim Deshaies | Charlie Leibrandt | Jim Deshaies | | 394 | 505 | -111 |
| 1990-07-24 | vs HOU | 94 | W 9-8 | 39-55 | 5 | 12,200 | Tony Castillo | Terry Clark | Kent Mercker | Juan Agosto | | 403 | 513 | -110 |
| 1990-07-25 | vs HOU | 95 | L 1-5 | 39-56 | 6 | 9,492 | Steve Avery | Danny Darwin | Danny Darwin | Steve Avery | | 404 | 518 | -114 |
| 1990-07-26 | @ LAN | 96 | L 1-8 | 39-57 | 6 | 31,461 | Marty Clary | Tim Belcher | Tim Belcher | Marty Clary | | 405 | 526 | -121 |
| 1990-07-27 | @ LAN | 97 | L 4-5 | 39-58 | 6 | 40,907 | Tom Glavine | Terry Wells | Ray Searage | Rick Luecken | | 409 | 531 | -122 |
| 1990-07-28 | @ LAN | 98 | L 7-8 | 39-59 | 6 | 38,022 | John Smoltz | Fernando Valenzuela | Mike Hartley | Mark Grant | | 416 | 539 | -123 |
| 1990-07-29 | @ LAN | 99 | L 3-4 | 39-60 | 6 | 34,975 | Charlie Leibrandt | Ramon Martinez | Ramon Martinez | Charlie Leibrandt | Tim Crews | 419 | 543 | -124 |
| 1990-07-30 | @ SDN | 100 | W 4-3 | 40-60 | 6 | 18,076 | Steve Avery | Ed Whitson | Dwayne Henry | Calvin Schiraldi | Tony Castillo | 423 | 546 | -123 |
| 1990-07-31 | @ SDN | 101 | L 6-7 | 40-61 | 6 | 12,310 | Marty Clary | Eric Show | Craig Lefferts | Rick Luecken | | 429 | 553 | -124 |
| 1990-08-02 | @ HOU | 102 | L 1-3 | 40-62 | 6 | 18,251 | Tom Glavine | Bill Gullickson | Bill Gullickson | Tom Glavine | Larry Andersen | 430 | 556 | -126 |
| 1990-08-03 | @ HOU | 103 | L 0-3 | 40-63 | 6 | 17,579 | John Smoltz | Mike Scott | Mike Scott | John Smoltz | | 430 | 559 | -129 |
| 1990-08-04 | @ HOU | 104 | L 2-6 | 40-64 | 6 | 18,751 | Charlie Leibrandt | Jim Deshaies | Jim Deshaies | Charlie Leibrandt | | 432 | 565 | -133 |
| 1990-08-05 | @ HOU | 105 | L 2-6 | 40-65 | 6 | 15,118 | Steve Avery | Danny Darwin | Danny Darwin | Steve Avery | | 434 | 571 | -137 |
| 1990-08-07 | vs SDN | 106 | L 2-7 | 40-67 | 6 | 0 | Tom Glavine | Andy Benes | Andy Benes | Tom Glavine | Greg Harris | 436 | 578 | -142 |
| 1990-08-07 | vs SDN | 107 | L 9-11 | 40-67 | 6 | 10,991 | Marty Clary | Eric Show | Eric Show | Marty Clary | Craig Lefferts | 445 | 589 | -144 |
| 1990-08-08 | vs SDN | 108 | W 7-1 | 41-67 | 6 | 6,070 | John Smoltz | Dennis Rasmussen | John Smoltz | Dennis Rasmussen | | 452 | 590 | -138 |
| 1990-08-09 | vs SDN | 109 | L 0-7 | 41-68 | 6 | 8,312 | Charlie Leibrandt | Bruce Hurst | Bruce Hurst | Charlie Leibrandt | | 452 | 597 | -145 |
| 1990-08-10 | vs LAN | 110 | W 3-2 | 42-68 | 6 | 27,627 | Steve Avery | Mike Morgan | Steve Avery | Mike Morgan | Kent Mercker | 455 | 599 | -144 |
| 1990-08-11 | vs LAN | 111 | L 4-6 | 42-69 | 6 | 30,845 | Mark Grant | Tim Belcher | Jay Howell | Marty Clary | Jim Gott | 459 | 605 | -146 |
| 1990-08-12 | vs LAN | 112 | L 3-7 | 42-70 | 6 | 12,451 | Tom Glavine | Jim Neidlinger | Jim Neidlinger | Tom Glavine | Jim Gott | 462 | 612 | -150 |
| 1990-08-13 | vs LAN | 113 | W 9-5 | 43-70 | 6 | 11,945 | John Smoltz | Fernando Valenzuela | John Smoltz | Fernando Valenzuela | | 471 | 617 | -146 |
| 1990-08-14 | @ PIT | 114 | L 1-3 | 43-72 | 6 | 0 | Charlie Leibrandt | Doug Drabek | Doug Drabek | Charlie Leibrandt | | 472 | 620 | -148 |
| 1990-08-14 | @ PIT | 115 | L 4-6 | 43-72 | 6 | 25,542 | Steve Avery | Zane Smith | Zane Smith | Steve Avery | Bob Patterson | 476 | 626 | -150 |
| 1990-08-15 | @ PIT | 116 | W 8-1 | 44-72 | 6 | 16,063 | Tony Castillo | Neal Heaton | Tony Castillo | Neal Heaton | | 484 | 627 | -143 |
| 1990-08-16 | @ PIT | 117 | L 3-4 | 44-73 | 6 | 19,304 | Tom Glavine | Randy Tomlin | Bob Kipper | Kent Mercker | | 487 | 631 | -144 |
| 1990-08-17 | @ CHN | 118 | L 0-7 | 44-74 | 6 | 29,893 | John Smoltz | Mike Harkey | Mike Harkey | John Smoltz | | 487 | 638 | -151 |
| 1990-08-18 | @ CHN | 119 | W 17-6 | 45-74 | 6 | 36,226 | Charlie Leibrandt | Lance Dickson | Charlie Leibrandt | Lance Dickson | | 504 | 644 | -140 |
| 1990-08-19 | @ CHN | 120 | L 4-5 | 45-75 | 6 | 33,284 | Steve Avery | Greg Maddux | Greg Maddux | Kent Mercker | Paul Assenmacher | 508 | 649 | -141 |
| 1990-08-20 | @ SLN | 121 | L 2-7 | 45-76 | 6 | 22,729 | Tom Glavine | Ken Hill | Ken Hill | Tom Glavine | | 510 | 656 | -146 |
| 1990-08-21 | @ SLN | 122 | W 7-2 | 46-76 | 6 | 27,388 | John Smoltz | Joe Magrane | John Smoltz | Joe Magrane | | 517 | 658 | -141 |
| 1990-08-22 | @ SLN | 123 | W 2-1 | 47-76 | 6 | 29,464 | Tony Castillo | Bob Tewksbury | Tony Castillo | Bob Tewksbury | Kent Mercker | 519 | 659 | -140 |
| 1990-08-23 | vs HOU | 124 | L 3-8 | 47-77 | 6 | 34,023 | Charlie Leibrandt | Mark Portugal | Mark Portugal | Charlie Leibrandt | | 522 | 667 | -145 |
| 1990-08-24 | vs CHN | 125 | W 3-0 | 48-77 | 6 | 20,922 | Steve Avery | Greg Maddux | Steve Avery | Greg Maddux | | 525 | 667 | -142 |
| 1990-08-25 | vs CHN | 126 | L 3-6 | 48-78 | 6 | 29,359 | Tom Glavine | Mike Bielecki | Mike Bielecki | Tom Glavine | Paul Assenmacher | 528 | 673 | -145 |
| 1990-08-26 | vs CHN | 127 | W 4-3 | 49-78 | 6 | 14,178 | John Smoltz | Mike Harkey | John Smoltz | Mitch Williams | | 532 | 676 | -144 |
| 1990-08-28 | vs PIT | 128 | W 9-0 | 50-78 | 6 | 5,872 | Charlie Leibrandt | John Smiley | Charlie Leibrandt | John Smiley | | 541 | 676 | -135 |
| 1990-08-29 | vs PIT | 129 | L 0-10 | 50-79 | 6 | 5,403 | Steve Avery | Doug Drabek | Doug Drabek | Steve Avery | | 541 | 686 | -145 |
| 1990-08-30 | vs SLN | 130 | L 3-5 | 50-80 | 6 | 3,672 | Tom Glavine | Omar Olivares | Frank DiPino | Dwayne Henry | Tom Niedenfuer | 544 | 691 | -147 |
| 1990-08-31 | vs SLN | 131 | W 4-1 | 51-80 | 6 | 6,957 | John Smoltz | Jose DeLeon | John Smoltz | Jose DeLeon | Kent Mercker | 548 | 692 | -144 |
| 1990-09-01 | vs SLN | 132 | W 4-3 | 52-80 | 6 | 14,673 | Paul Marak | Ken Hill | Tony Castillo | Ken Hill | Kent Mercker | 552 | 695 | -143 |
| 1990-09-02 | vs SLN | 133 | W 5-0 | 53-80 | 6 | 10,070 | Charlie Leibrandt | John Tudor | Charlie Leibrandt | John Tudor | | 557 | 695 | -138 |
| 1990-09-03 | vs CIN | 134 | W 8-6 | 54-80 | 6 | 9,176 | Steve Avery | Tom Browning | Mark Grant | Tim Layana | Jeff Parrett | 565 | 701 | -136 |
| 1990-09-04 | vs CIN | 135 | W 7-4 | 55-80 | 6 | 4,463 | Tom Glavine | Danny Jackson | Tom Glavine | Danny Jackson | Kent Mercker | 572 | 705 | -133 |
| 1990-09-05 | @ LAN | 136 | W 6-2 | 56-80 | 6 | 27,148 | John Smoltz | Mike Morgan | John Smoltz | Mike Morgan | | 578 | 707 | -129 |
| 1990-09-06 | @ LAN | 137 | L 0-5 | 56-81 | 6 | 36,362 | Paul Marak | Mike Hartley | Mike Hartley | Paul Marak | | 578 | 712 | -134 |
| 1990-09-07 | @ SDN | 138 | W 4-1 | 57-81 | 6 | 12,449 | Charlie Leibrandt | Ed Whitson | Charlie Leibrandt | Ed Whitson | | 582 | 713 | -131 |
| 1990-09-08 | @ SDN | 139 | W 11-5 | 58-81 | 6 | 12,802 | Steve Avery | Calvin Schiraldi | Jeff Parrett | Derek Lilliquist | | 593 | 718 | -125 |
| 1990-09-09 | @ SDN | 140 | L 4-5 | 58-82 | 6 | 28,593 | Tom Glavine | Andy Benes | Eric Show | Kent Mercker | | 597 | 723 | -126 |
| 1990-09-10 | @ SFN | 141 | L 6-7 | 58-83 | 6 | 6,965 | John Smoltz | Don Robinson | Steve Bedrosian | Kent Mercker | | 603 | 730 | -127 |
| 1990-09-11 | @ SFN | 142 | L 0-2 | 58-84 | 6 | 11,791 | Paul Marak | Scott Garrelts | Scott Garrelts | Mark Grant | Steve Bedrosian | 603 | 732 | -129 |
| 1990-09-12 | @ SFN | 143 | L 3-8 | 58-85 | 6 | 8,427 | Charlie Leibrandt | John Burkett | John Burkett | Charlie Leibrandt | Francisco Oliveras | 606 | 740 | -134 |
| 1990-09-14 | vs SDN | 144 | W 7-3 | 59-85 | 6 | 4,395 | Tom Glavine | Derek Lilliquist | Tom Glavine | Derek Lilliquist | Mark Grant | 613 | 743 | -130 |
| 1990-09-15 | vs SDN | 145 | L 3-5 | 59-86 | 6 | 7,390 | John Smoltz | Andy Benes | Craig Lefferts | Jeff Parrett | Eric Show | 616 | 748 | -132 |
| 1990-09-16 | vs SDN | 146 | L 4-9 | 59-87 | 6 | 4,058 | Steve Avery | Dennis Rasmussen | Dennis Rasmussen | Steve Avery | | 620 | 757 | -137 |
| 1990-09-17 | vs LAN | 147 | L 2-5 | 59-88 | 6 | 3,473 | Charlie Leibrandt | Tim Crews | Tim Crews | Charlie Leibrandt | Jay Howell | 622 | 762 | -140 |
| 1990-09-18 | vs LAN | 148 | L 2-6 | 59-89 | 6 | 3,891 | Paul Marak | Jim Neidlinger | Jim Neidlinger | Paul Marak | | 624 | 768 | -144 |
| 1990-09-19 | vs SFN | 149 | W 5-1 | 60-89 | 6 | 3,715 | Tom Glavine | Kelly Downs | Tom Glavine | Kelly Downs | Mark Grant | 629 | 769 | -140 |
| 1990-09-20 | vs SFN | 150 | L 3-5 | 60-90 | 6 | 3,790 | John Smoltz | Eric Gunderson | Eric Gunderson | John Smoltz | Rick Reuschel | 632 | 774 | -142 |
| 1990-09-21 | vs HOU | 151 | L 3-4 | 60-91 | 6 | 6,081 | Steve Avery | Jim Deshaies | Juan Agosto | Kent Mercker | | 635 | 778 | -143 |
| 1990-09-22 | vs HOU | 152 | W 3-1 | 61-91 | 6 | 13,635 | Charlie Leibrandt | Danny Darwin | Charlie Leibrandt | Danny Darwin | | 638 | 779 | -141 |
| 1990-09-23 | vs HOU | 153 | W 3-0 | 62-91 | 6 | 9,060 | Paul Marak | Bill Gullickson | Paul Marak | Bill Gullickson | | 641 | 779 | -138 |
| 1990-09-25 | @ CIN | 154 | W 10-0 | 63-91 | 6 | 25,095 | Tom Glavine | Norm Charlton | Tom Glavine | Norm Charlton | | 651 | 779 | -128 |
| 1990-09-26 | @ CIN | 155 | L 2-5 | 63-92 | 6 | 22,278 | John Smoltz | Jose Rijo | Jose Rijo | John Smoltz | | 653 | 784 | -131 |
| 1990-09-27 | @ CIN | 156 | L 2-4 | 63-93 | 6 | 20,757 | Steve Avery | Tom Browning | Tom Browning | Steve Avery | Rob Dibble | 655 | 788 | -133 |
| 1990-09-28 | @ HOU | 157 | L 1-2 | 63-94 | 6 | 11,045 | Paul Marak | Danny Darwin | Al Osuna | Kent Mercker | | 656 | 790 | -134 |
| 1990-09-29 | @ HOU | 158 | L 0-9 | 63-95 | 6 | 8,129 | Charlie Leibrandt | Bill Gullickson | Bill Gullickson | Charlie Leibrandt | | 656 | 799 | -143 |
| 1990-09-30 | @ HOU | 159 | L 2-6 | 63-96 | 6 | 14,387 | Tom Glavine | Mark Portugal | Mark Portugal | Tom Glavine | Jim Clancy | 658 | 805 | -147 |
| 1990-10-01 | @ SFN | 160 | W 5-3 | 64-96 | 6 | 7,183 | John Smoltz | Trevor Wilson | John Smoltz | Trevor Wilson | Kent Mercker | 663 | 808 | -145 |
| 1990-10-02 | @ SFN | 161 | W 16-7 | 65-96 | 6 | 9,362 | Paul Marak | John Burkett | Marvin Freeman | Mark Dewey | Mark Grant | 679 | 815 | -136 |
| 1990-10-03 | @ SFN | 162 | L 3-6 | 65-97 | 6 | 8,559 | Charlie Leibrandt | Kelly Downs | Steve Bedrosian | Steve Avery | Francisco Oliveras | 682 | 821 | -139 |