| 1990-04-09 | @ SLN | 1 | L 5-6 | 0-1 | 4 | 48,752 | Dennis Martinez | Joe Magrane | Ken Dayley | Mark Gardner | | 5 | 6 | -1 |
| 1990-04-10 | @ SLN | 2 | L 2-4 | 0-2 | 4 | 22,571 | Zane Smith | Bryn Smith | Bryn Smith | Zane Smith | Scott Terry | 7 | 10 | -3 |
| 1990-04-11 | @ SLN | 3 | W 6-4 | 1-2 | 5 | 26,174 | Oil Can Boyd | Jose DeLeon | Oil Can Boyd | Greg Mathews | Tim Burke | 13 | 14 | -1 |
| 1990-04-13 | vs NYN | 4 | L 1-4 | 1-3 | 5 | 44,183 | Kevin Gross | David Cone | Julio Machado | Drew Hall | John Franco | 14 | 18 | -4 |
| 1990-04-14 | vs NYN | 5 | W 6-5 | 2-3 | 3 | 16,165 | Dennis Martinez | Dwight Gooden | Dennis Martinez | Dwight Gooden | Steve Frey | 20 | 23 | -3 |
| 1990-04-15 | vs NYN | 6 | W 3-1 | 3-3 | 2 | 10,187 | Zane Smith | Ron Darling | Zane Smith | Ron Darling | Tim Burke | 23 | 24 | -1 |
| 1990-04-16 | vs PHI | 7 | W 5-4 | 4-3 | 2 | 11,063 | Oil Can Boyd | Terry Mulholland | Joe Hesketh | Jeff Parrett | Steve Frey | 28 | 28 | 0 |
| 1990-04-17 | vs PHI | 8 | W 2-1 | 5-3 | 2 | 8,406 | Mark Gardner | Pat Combs | Drew Hall | Todd Frohwirth | Steve Frey | 30 | 29 | 1 |
| 1990-04-18 | vs PHI | 9 | L 3-4 | 5-4 | 2 | 10,096 | Kevin Gross | Ken Howell | Ken Howell | Kevin Gross | Roger McDowell | 33 | 33 | 0 |
| 1990-04-19 | @ PHI | 10 | W 5-0 | 6-4 | 2 | 8,417 | Dennis Martinez | Bruce Ruffin | Dennis Martinez | Bruce Ruffin | | 38 | 33 | 5 |
| 1990-04-20 | @ NYN | 11 | W 2-1 | 7-4 | 1 | 24,130 | Zane Smith | Ron Darling | Zane Smith | Ron Darling | Tim Burke | 40 | 34 | 6 |
| 1990-04-21 | @ NYN | 12 | L 4-5 | 7-5 | 1 | 20,748 | Oil Can Boyd | Frank Viola | Frank Viola | Oil Can Boyd | John Franco | 44 | 39 | 5 |
| 1990-04-22 | @ NYN | 13 | L 0-5 | 7-6 | 2 | 32,843 | Mark Gardner | Sid Fernandez | Sid Fernandez | Mark Gardner | | 44 | 44 | 0 |
| 1990-04-24 | @ HOU | 14 | W 5-3 | 8-6 | 2 | 9,542 | Kevin Gross | Mike Scott | Kevin Gross | Mike Scott | Tim Burke | 49 | 47 | 2 |
| 1990-04-25 | @ HOU | 15 | W 1-0 | 9-6 | 2 | 11,251 | Dennis Martinez | Jim Deshaies | Steve Frey | Dave Smith | Tim Burke | 50 | 47 | 3 |
| 1990-04-27 | @ CIN | 16 | L 2-3 | 9-7 | 2 | 25,564 | Zane Smith | Tom Browning | Rob Dibble | Drew Hall | | 52 | 50 | 2 |
| 1990-04-28 | @ CIN | 17 | L 4-6 | 9-8 | 3 | 21,775 | Oil Can Boyd | Jack Armstrong | Jack Armstrong | Oil Can Boyd | Randy Myers | 56 | 56 | 0 |
| 1990-04-29 | @ CIN | 18 | W 6-3 | 10-8 | 2 | 27,344 | Kevin Gross | Danny Jackson | Kevin Gross | Ron Robinson | Tim Burke | 62 | 59 | 3 |
| 1990-04-30 | vs HOU | 19 | L 2-4 | 10-9 | 2 | 10,060 | Dennis Martinez | Jim Deshaies | Larry Andersen | Dennis Martinez | Dave Smith | 64 | 63 | 1 |
| 1990-05-01 | vs HOU | 20 | W 2-1 | 11-9 | 2 | 9,700 | Mark Gardner | Mark Portugal | Drew Hall | Larry Andersen | | 66 | 64 | 2 |
| 1990-05-02 | vs ATL | 21 | L 1-8 | 11-10 | 3 | 9,575 | Zane Smith | Marty Clary | Marty Clary | Zane Smith | | 67 | 72 | -5 |
| 1990-05-03 | vs ATL | 22 | L 1-4 | 11-11 | 3 | 9,057 | Oil Can Boyd | Tom Glavine | Charlie Kerfeld | Drew Hall | Joe Boever | 68 | 76 | -8 |
| 1990-05-04 | vs SFN | 23 | W 5-4 | 12-11 | 3 | 14,001 | Kevin Gross | Rick Reuschel | Kevin Gross | Rick Reuschel | Tim Burke | 73 | 80 | -7 |
| 1990-05-05 | vs SFN | 24 | L 1-4 | 12-12 | 3 | 14,544 | Dennis Martinez | John Burkett | John Burkett | Dennis Martinez | Jeff Brantley | 74 | 84 | -10 |
| 1990-05-06 | vs SFN | 25 | W 7-0 | 13-12 | 3 | 16,043 | Mark Gardner | Atlee Hammaker | Mark Gardner | Atlee Hammaker | | 81 | 84 | -3 |
| 1990-05-07 | vs SFN | 26 | W 7-6 | 14-12 | 3 | 9,265 | Zane Smith | Scott Garrelts | Steve Frey | Steve Bedrosian | | 88 | 90 | -2 |
| 1990-05-08 | vs LAN | 27 | W 9-1 | 15-12 | 2 | 12,599 | Bill Sampen | Tim Belcher | Bill Sampen | Tim Belcher | Drew Hall | 97 | 91 | 6 |
| 1990-05-09 | vs LAN | 28 | W 5-3 | 16-12 | 2 | 13,215 | Kevin Gross | Fernando Valenzuela | Kevin Gross | Fernando Valenzuela | Tim Burke | 102 | 94 | 8 |
| 1990-05-10 | vs LAN | 29 | W 8-2 | 17-12 | 2 | 9,157 | Dennis Martinez | Ramon Martinez | Dennis Martinez | Ramon Martinez | | 110 | 96 | 14 |
| 1990-05-11 | @ SDN | 30 | L 3-5 | 17-13 | 3 | 31,080 | Mark Gardner | Ed Whitson | Craig Lefferts | Drew Hall | | 113 | 101 | 12 |
| 1990-05-12 | @ SDN | 31 | L 2-5 | 17-14 | 3 | 24,493 | Zane Smith | Bruce Hurst | Bruce Hurst | Zane Smith | | 115 | 106 | 9 |
| 1990-05-13 | @ SDN | 32 | W 15-0 | 18-14 | 3 | 16,197 | Oil Can Boyd | Eric Show | Oil Can Boyd | Eric Show | | 130 | 106 | 24 |
| 1990-05-14 | @ LAN | 33 | L 2-3 | 18-15 | 3 | 28,758 | Kevin Gross | Fernando Valenzuela | Fernando Valenzuela | Kevin Gross | Don Aase | 132 | 109 | 23 |
| 1990-05-15 | @ LAN | 34 | L 2-3 | 18-16 | 3 | 24,308 | Dennis Martinez | Ramon Martinez | Ramon Martinez | Dennis Martinez | Tim Crews | 134 | 112 | 22 |
| 1990-05-16 | @ LAN | 35 | L 2-3 | 18-17 | 3 | 24,158 | Mark Gardner | Mike Morgan | Mike Morgan | Drew Hall | | 136 | 115 | 21 |
| 1990-05-18 | @ SFN | 36 | L 2-7 | 18-18 | 3 | 22,932 | Oil Can Boyd | Rick Reuschel | Atlee Hammaker | Steve Frey | | 138 | 122 | 16 |
| 1990-05-19 | @ SFN | 37 | W 7-4 | 19-18 | 3 | 22,575 | Kevin Gross | Bob Knepper | Kevin Gross | Bob Knepper | Tim Burke | 145 | 126 | 19 |
| 1990-05-20 | @ SFN | 38 | W 6-5 | 20-18 | 3 | 25,285 | Dennis Martinez | John Burkett | Bill Sampen | Atlee Hammaker | Tim Burke | 151 | 131 | 20 |
| 1990-05-22 | vs SDN | 39 | W 6-1 | 21-18 | 3 | 11,690 | Mark Gardner | Ed Whitson | Mark Gardner | Ed Whitson | | 157 | 132 | 25 |
| 1990-05-23 | vs SDN | 40 | W 4-0 | 22-18 | 3 | 12,469 | Oil Can Boyd | Bruce Hurst | Oil Can Boyd | Bruce Hurst | | 161 | 132 | 29 |
| 1990-05-24 | vs CIN | 41 | L 1-7 | 22-19 | 3 | 14,562 | Kevin Gross | Ron Robinson | Ron Robinson | Kevin Gross | | 162 | 139 | 23 |
| 1990-05-25 | vs CIN | 42 | L 0-5 | 22-20 | 3 | 17,058 | Dennis Martinez | Jack Armstrong | Jack Armstrong | Dennis Martinez | | 162 | 144 | 18 |
| 1990-05-26 | vs CIN | 43 | L 3-5 | 22-21 | 3 | 14,653 | Zane Smith | Danny Jackson | Rob Dibble | Tim Burke | Randy Myers | 165 | 149 | 16 |
| 1990-05-27 | vs CIN | 44 | W 5-3 | 23-21 | 3 | 30,183 | Mark Gardner | Jose Rijo | Drew Hall | Tim Birtsas | Tim Burke | 170 | 152 | 18 |
| 1990-05-28 | @ ATL | 45 | W 4-1 | 24-21 | 3 | 25,152 | Oil Can Boyd | Derek Lilliquist | Kevin Gross | Derek Lilliquist | | 174 | 153 | 21 |
| 1990-05-30 | @ ATL | 46 | W 9-6 | 25-21 | 3 | 10,372 | Bill Sampen | Tom Glavine | Dave J. Schmidt | Tom Glavine | Drew Hall | 183 | 159 | 24 |
| 1990-06-01 | @ PIT | 47 | W 4-1 | 26-21 | 2 | 27,410 | Kevin Gross | Doug Drabek | Kevin Gross | Doug Drabek | Dale Mohorcic | 187 | 160 | 27 |
| 1990-06-02 | @ PIT | 48 | L 3-4 | 26-22 | 3 | 47,374 | Zane Smith | Neal Heaton | Bill Landrum | Drew Hall | | 190 | 164 | 26 |
| 1990-06-03 | @ PIT | 49 | W 4-3 | 27-22 | 3 | 27,817 | Dennis Martinez | Bob Walk | Bill Sampen | Stan Belinda | Dave J. Schmidt | 194 | 167 | 27 |
| 1990-06-04 | @ NYN | 50 | W 5-3 | 28-22 | 2 | 24,433 | Mark Gardner | David Cone | Bill Sampen | David Cone | Dave J. Schmidt | 199 | 170 | 29 |
| 1990-06-05 | @ NYN | 51 | L 5-6 | 28-23 | 3 | 26,670 | Oil Can Boyd | Bob Ojeda | John Franco | Dale Mohorcic | | 204 | 176 | 28 |
| 1990-06-06 | @ NYN | 52 | L 3-4 | 28-24 | 3 | 26,238 | Kevin Gross | Frank Viola | Frank Viola | Kevin Gross | John Franco | 207 | 180 | 27 |
| 1990-06-07 | vs SLN | 53 | W 3-2 | 29-24 | 3 | 15,360 | Zane Smith | Jose DeLeon | Zane Smith | Jose DeLeon | Dave J. Schmidt | 210 | 182 | 28 |
| 1990-06-08 | vs SLN | 54 | W 18-2 | 30-24 | 2 | 20,127 | Dennis Martinez | Bryn Smith | Dennis Martinez | Bryn Smith | | 228 | 184 | 44 |
| 1990-06-09 | vs SLN | 55 | W 3-1 | 31-24 | 2 | 27,388 | Mark Gardner | Scott Terry | Mark Gardner | Scott Terry | Dave J. Schmidt | 231 | 185 | 46 |
| 1990-06-10 | vs SLN | 56 | L 3-5 | 31-25 | 2 | 30,349 | Oil Can Boyd | Joe Magrane | Joe Magrane | Oil Can Boyd | Lee Smith | 234 | 190 | 44 |
| 1990-06-11 | @ PHI | 57 | W 5-0 | 33-25 | 2 | 0 | Kevin Gross | Dennis Cook | Kevin Gross | Dennis Cook | | 239 | 190 | 49 |
| 1990-06-11 | @ PHI | 58 | W 3-2 | 33-25 | 2 | 22,700 | Chris Nabholz | Pat Combs | Drew Hall | Jeff Parrett | Dave J. Schmidt | 242 | 192 | 50 |
| 1990-06-12 | @ PHI | 59 | L 2-7 | 33-26 | 2 | 19,169 | Zane Smith | Ken Howell | Ken Howell | Zane Smith | | 244 | 199 | 45 |
| 1990-06-13 | @ PHI | 60 | W 4-3 | 34-26 | 2 | 18,655 | Dennis Martinez | Jose De Jesus | Dave J. Schmidt | Roger McDowell | Drew Hall | 248 | 202 | 46 |
| 1990-06-14 | @ SLN | 61 | W 3-2 | 35-26 | 2 | 33,575 | Mark Gardner | Bryn Smith | Bill Sampen | Tom Niedenfuer | Dave J. Schmidt | 251 | 204 | 47 |
| 1990-06-15 | @ SLN | 62 | W 7-4 | 36-26 | 2 | 34,377 | Oil Can Boyd | Joe Magrane | Steve Frey | Joe Magrane | Dave J. Schmidt | 258 | 208 | 50 |
| 1990-06-16 | @ SLN | 63 | L 3-5 | 36-27 | 2 | 43,553 | Kevin Gross | Bob Tewksbury | Bob Tewksbury | Drew Hall | Tom Niedenfuer | 261 | 213 | 48 |
| 1990-06-17 | @ SLN | 64 | L 1-7 | 36-28 | 2 | 34,810 | Zane Smith | Jose DeLeon | Jose DeLeon | Zane Smith | | 262 | 220 | 42 |
| 1990-06-18 | vs CHN | 65 | W 5-1 | 37-28 | 2 | 15,898 | Dennis Martinez | Mike Harkey | Dennis Martinez | Mike Harkey | | 267 | 221 | 46 |
| 1990-06-19 | vs CHN | 66 | L 1-2 | 37-29 | 2 | 20,306 | Mark Gardner | Shawn Boskie | Shawn Boskie | Mark Gardner | Les Lancaster | 268 | 223 | 45 |
| 1990-06-20 | vs CHN | 67 | W 3-2 | 38-29 | 2 | 22,058 | Oil Can Boyd | Greg Maddux | Dale Mohorcic | Greg Maddux | Dave J. Schmidt | 271 | 225 | 46 |
| 1990-06-22 | vs PIT | 68 | W 4-3 | 39-29 | 2 | 22,968 | Kevin Gross | Walt Terrell | Bill Sampen | Stan Belinda | Dave J. Schmidt | 275 | 228 | 47 |
| 1990-06-23 | vs PIT | 69 | W 6-1 | 40-29 | 1 | 27,605 | Zane Smith | Doug Drabek | Zane Smith | Doug Drabek | | 281 | 229 | 52 |
| 1990-06-24 | vs PIT | 70 | L 3-5 | 40-30 | 2 | 41,054 | Dennis Martinez | Neal Heaton | Neal Heaton | Dennis Martinez | Stan Belinda | 284 | 234 | 50 |
| 1990-06-25 | @ CHN | 71 | W 7-3 | 41-30 | 2 | 32,231 | Mark Gardner | Shawn Boskie | Mark Gardner | Shawn Boskie | Bill Sampen | 291 | 237 | 54 |
| 1990-06-26 | @ CHN | 72 | W 6-5 | 42-30 | 2 | 31,676 | Oil Can Boyd | Greg Maddux | Dave J. Schmidt | Les Lancaster | Steve Frey | 297 | 242 | 55 |
| 1990-06-27 | @ CHN | 73 | L 3-5 | 42-31 | 2 | 32,830 | Kevin Gross | Jeff Pico | Jeff Pico | Kevin Gross | Steve Wilson | 300 | 247 | 53 |
| 1990-06-28 | @ CHN | 74 | L 2-3 | 42-32 | 3 | 31,974 | Zane Smith | Mike Bielecki | Les Lancaster | Bill Sampen | | 302 | 250 | 52 |
| 1990-06-29 | vs ATL | 75 | L 2-4 | 42-33 | 3 | 14,210 | Dennis Martinez | Tom Glavine | Tom Glavine | Dennis Martinez | Joe Hesketh | 304 | 254 | 50 |
| 1990-06-30 | vs ATL | 76 | L 6-7 | 42-34 | 3 | 16,514 | Mark Gardner | Charlie Leibrandt | Charlie Leibrandt | Mark Gardner | Joe Hesketh | 310 | 261 | 49 |
| 1990-07-01 | vs ATL | 77 | W 5-1 | 43-34 | 3 | 27,763 | Oil Can Boyd | Steve Avery | Oil Can Boyd | Steve Avery | | 315 | 262 | 53 |
| 1990-07-02 | vs ATL | 78 | L 3-6 | 43-35 | 3 | 14,425 | Howard Farmer | John Smoltz | John Smoltz | Howard Farmer | Joe Boever | 318 | 268 | 50 |
| 1990-07-03 | vs CIN | 79 | L 0-2 | 43-36 | 3 | 14,944 | Zane Smith | Tom Browning | Tom Browning | Zane Smith | Randy Myers | 318 | 270 | 48 |
| 1990-07-04 | vs CIN | 80 | W 5-3 | 44-36 | 3 | 15,827 | Dennis Martinez | Scott Scudder | Dennis Martinez | Scott Scudder | Dave J. Schmidt | 323 | 273 | 50 |
| 1990-07-05 | vs HOU | 81 | W 11-0 | 45-36 | 3 | 14,885 | Mark Gardner | Mike Scott | Mark Gardner | Mike Scott | | 334 | 273 | 61 |
| 1990-07-06 | vs HOU | 82 | W 3-2 | 46-36 | 3 | 15,806 | Oil Can Boyd | Danny Darwin | Bill Sampen | Juan Agosto | Dave J. Schmidt | 337 | 275 | 62 |
| 1990-07-07 | vs HOU | 83 | W 3-1 | 47-36 | 3 | 20,171 | Zane Smith | Jim Deshaies | Zane Smith | Jim Deshaies | Dave J. Schmidt | 340 | 276 | 64 |
| 1990-07-08 | vs HOU | 84 | L 3-5 | 47-37 | 3 | 26,016 | Dennis Martinez | Mark Portugal | Mark Portugal | Dennis Martinez | Dave Smith | 343 | 281 | 62 |
| 1990-07-12 | @ ATL | 85 | W 3-0 | 48-37 | 3 | 7,654 | Mark Gardner | Tom Glavine | Mark Gardner | Tom Glavine | | 346 | 281 | 65 |
| 1990-07-14 | @ ATL | 86 | L 2-3 | 49-38 | 3 | 0 | Dennis Martinez | John Smoltz | Kent Mercker | Dave J. Schmidt | | 348 | 284 | 64 |
| 1990-07-14 | @ ATL | 87 | W 6-2 | 49-38 | 3 | 20,452 | Oil Can Boyd | Charlie Leibrandt | Oil Can Boyd | Charlie Leibrandt | Dale Mohorcic | 354 | 286 | 68 |
| 1990-07-15 | @ ATL | 88 | W 16-14 | 50-38 | 3 | 11,237 | Bill Sampen | Steve Avery | Steve Frey | Kent Mercker | Dave J. Schmidt | 370 | 300 | 70 |
| 1990-07-16 | @ CIN | 89 | L 3-8 | 50-39 | 3 | 25,521 | Zane Smith | Chris Hammond | Tim Layana | Zane Smith | | 373 | 308 | 65 |
| 1990-07-17 | @ CIN | 90 | L 2-6 | 50-40 | 3 | 30,828 | Mark Gardner | Scott Scudder | Scott Scudder | Mark Gardner | | 375 | 314 | 61 |
| 1990-07-18 | @ CIN | 91 | L 7-8 | 50-41 | 3 | 27,180 | Dennis Martinez | Tom Browning | Rick Mahler | Dave J. Schmidt | | 382 | 322 | 60 |
| 1990-07-19 | @ HOU | 92 | L 3-4 | 50-42 | 3 | 16,312 | Oil Can Boyd | Jim Deshaies | Larry Andersen | Bill Sampen | | 385 | 326 | 59 |
| 1990-07-20 | @ HOU | 93 | L 6-12 | 50-43 | 3 | 15,734 | Kevin Gross | Danny Darwin | Danny Darwin | Kevin Gross | | 391 | 338 | 53 |
| 1990-07-21 | @ HOU | 94 | W 3-2 | 51-43 | 3 | 25,427 | Zane Smith | Mark Portugal | Zane Smith | Juan Agosto | Tim Burke | 394 | 340 | 54 |
| 1990-07-22 | @ HOU | 95 | L 2-3 | 51-44 | 3 | 20,028 | Mark Gardner | Bill Gullickson | Juan Agosto | Dave J. Schmidt | Dave Smith | 396 | 343 | 53 |
| 1990-07-23 | vs PIT | 96 | W 5-0 | 52-44 | 3 | 27,499 | Dennis Martinez | John Smiley | Dennis Martinez | John Smiley | | 401 | 343 | 58 |
| 1990-07-24 | vs PIT | 97 | L 3-5 | 52-45 | 3 | 24,444 | Kevin Gross | Doug Drabek | Doug Drabek | Kevin Gross | Stan Belinda | 404 | 348 | 56 |
| 1990-07-25 | vs PIT | 98 | W 8-7 | 53-45 | 3 | 21,669 | Zane Smith | Bob Walk | Bill Sampen | Stan Belinda | | 412 | 355 | 57 |
| 1990-07-26 | vs CHN | 99 | W 3-2 | 54-45 | 3 | 19,129 | Oil Can Boyd | Shawn Boskie | Tim Burke | Mitch Williams | | 415 | 357 | 58 |
| 1990-07-27 | vs CHN | 100 | L 0-2 | 54-46 | 3 | 21,980 | Mark Gardner | Greg Maddux | Greg Maddux | Bill Sampen | Bill Long | 415 | 359 | 56 |
| 1990-07-28 | vs CHN | 101 | L 7-10 | 54-47 | 3 | 24,808 | Dennis Martinez | Mike Bielecki | Bill Long | Tim Burke | | 422 | 369 | 53 |
| 1990-07-29 | vs CHN | 102 | L 1-2 | 54-48 | 3 | 24,333 | Kevin Gross | Mike Harkey | Mike Harkey | Kevin Gross | Mitch Williams | 423 | 371 | 52 |
| 1990-07-31 | vs NYN | 103 | W 7-4 | 55-48 | 3 | 24,386 | Oil Can Boyd | Sid Fernandez | Oil Can Boyd | Sid Fernandez | Tim Burke | 430 | 375 | 55 |
| 1990-08-01 | vs NYN | 104 | L 4-6 | 55-49 | 3 | 28,556 | Zane Smith | Ron Darling | Bob Ojeda | Bill Sampen | | 434 | 381 | 53 |
| 1990-08-02 | vs NYN | 105 | L 1-5 | 55-50 | 3 | 32,507 | Dennis Martinez | Frank Viola | Frank Viola | Dennis Martinez | | 435 | 386 | 49 |
| 1990-08-03 | @ CHN | 106 | L 4-10 | 55-51 | 3 | 33,318 | Mark Gardner | Mike Harkey | Mike Harkey | Mark Gardner | | 439 | 396 | 43 |
| 1990-08-04 | @ CHN | 107 | L 2-10 | 55-52 | 3 | 35,176 | Kevin Gross | Shawn Boskie | Shawn Boskie | Kevin Gross | | 441 | 406 | 35 |
| 1990-08-05 | @ CHN | 108 | L 1-3 | 55-53 | 3 | 33,481 | Oil Can Boyd | Greg Maddux | Greg Maddux | Oil Can Boyd | | 442 | 409 | 33 |
| 1990-08-07 | @ PIT | 109 | L 3-4 | 55-54 | 3 | 23,666 | Zane Smith | John Smiley | Mark Ross | Dale Mohorcic | | 445 | 413 | 32 |
| 1990-08-08 | @ PIT | 110 | W 6-2 | 56-54 | 3 | 21,180 | Dennis Martinez | Doug Drabek | Dennis Martinez | Doug Drabek | | 451 | 415 | 36 |
| 1990-08-09 | @ PIT | 111 | W 7-6 | 57-54 | 3 | 21,499 | Kevin Gross | Neal Heaton | Steve Frey | Bill Landrum | Bill Sampen | 458 | 421 | 37 |
| 1990-08-10 | vs PHI | 112 | W 4-3 | 58-54 | 3 | 17,904 | Oil Can Boyd | Terry Mulholland | Oil Can Boyd | Terry Mulholland | Steve Frey | 462 | 424 | 38 |
| 1990-08-11 | vs PHI | 113 | W 5-4 | 59-54 | 3 | 23,708 | Mark Gardner | Jason Grimsley | Bill Sampen | Don Carman | | 467 | 428 | 39 |
| 1990-08-12 | vs PHI | 114 | W 6-3 | 60-54 | 3 | 29,186 | Chris Nabholz | Jose De Jesus | Chris Nabholz | Jose De Jesus | Tim Burke | 473 | 431 | 42 |
| 1990-08-14 | @ SDN | 115 | W 8-3 | 61-54 | 3 | 15,855 | Dennis Martinez | Dennis Rasmussen | Dennis Martinez | Dennis Rasmussen | | 481 | 434 | 47 |
| 1990-08-15 | @ SDN | 116 | W 5-3 | 62-54 | 3 | 14,271 | Kevin Gross | Bruce Hurst | Bill Sampen | John Davis | | 486 | 437 | 49 |
| 1990-08-16 | @ SDN | 117 | L 2-3 | 62-55 | 3 | 14,331 | Oil Can Boyd | Ed Whitson | Rich Rodriguez | Tim Burke | | 488 | 440 | 48 |
| 1990-08-17 | @ LAN | 118 | L 6-7 | 62-56 | 3 | 33,737 | Mark Gardner | Jim Neidlinger | Jim Neidlinger | Mark Gardner | Jay Howell | 494 | 447 | 47 |
| 1990-08-18 | @ LAN | 119 | L 2-3 | 62-57 | 3 | 45,687 | Chris Nabholz | Fernando Valenzuela | Fernando Valenzuela | Mel Rojas | Jim Gott | 496 | 450 | 46 |
| 1990-08-19 | @ LAN | 120 | W 2-1 | 63-57 | 3 | 40,603 | Dennis Martinez | Ramon Martinez | Dennis Martinez | Ramon Martinez | Steve Frey | 498 | 451 | 47 |
| 1990-08-20 | @ SFN | 121 | L 2-4 | 63-58 | 3 | 13,888 | Kevin Gross | Don Robinson | Don Robinson | Kevin Gross | | 500 | 455 | 45 |
| 1990-08-21 | @ SFN | 122 | W 10-5 | 64-58 | 3 | 16,759 | Oil Can Boyd | John Burkett | Mel Rojas | Trevor Wilson | | 510 | 460 | 50 |
| 1990-08-22 | @ SFN | 123 | L 1-2 | 64-59 | 3 | 28,429 | Mark Gardner | Scott Garrelts | Steve Bedrosian | Steve Frey | | 511 | 462 | 49 |
| 1990-08-24 | vs SDN | 124 | L 1-2 | 64-60 | 3 | 17,473 | Dennis Martinez | Andy Benes | Andy Benes | Dennis Martinez | Craig Lefferts | 512 | 464 | 48 |
| 1990-08-25 | vs SDN | 125 | W 2-1 | 65-60 | 3 | 18,239 | Chris Nabholz | Dennis Rasmussen | Chris Nabholz | Dennis Rasmussen | Mel Rojas | 514 | 465 | 49 |
| 1990-08-26 | vs SDN | 126 | W 4-2 | 66-60 | 3 | 27,650 | Kevin Gross | Bruce Hurst | Steve Frey | Bruce Hurst | | 518 | 467 | 51 |
| 1990-08-27 | vs SDN | 127 | L 1-4 | 66-61 | 3 | 13,403 | Oil Can Boyd | Ed Whitson | Ed Whitson | Oil Can Boyd | Craig Lefferts | 519 | 471 | 48 |
| 1990-08-28 | vs SFN | 128 | W 5-2 | 67-61 | 3 | 15,357 | Mark Gardner | Scott Garrelts | Mark Gardner | Scott Garrelts | Tim Burke | 524 | 473 | 51 |
| 1990-08-29 | vs SFN | 129 | L 5-6 | 67-62 | 3 | 14,029 | Dennis Martinez | Kelly Downs | Jeff Brantley | Bill Sampen | Steve Bedrosian | 529 | 479 | 50 |
| 1990-08-31 | vs LAN | 130 | W 5-2 | 68-62 | 3 | 14,514 | Chris Nabholz | Mike Morgan | Chris Nabholz | Mike Morgan | Steve Frey | 534 | 481 | 53 |
| 1990-09-01 | vs LAN | 131 | W 6-0 | 69-62 | 3 | 16,236 | Oil Can Boyd | Mike Hartley | Oil Can Boyd | Mike Hartley | | 540 | 481 | 59 |
| 1990-09-02 | vs LAN | 132 | L 5-12 | 69-63 | 3 | 22,776 | Mark Gardner | Jim Neidlinger | Tim Crews | Mark Gardner | | 545 | 493 | 52 |
| 1990-09-03 | vs CHN | 133 | W 3-2 | 70-63 | 3 | 22,629 | Howard Farmer | Rick Sutcliffe | Steve Frey | Randy Kramer | | 548 | 495 | 53 |
| 1990-09-04 | vs CHN | 134 | L 1-3 | 70-64 | 3 | 10,605 | Dennis Martinez | Mike Bielecki | Mike Bielecki | Dennis Martinez | Paul Assenmacher | 549 | 498 | 51 |
| 1990-09-05 | @ SLN | 135 | W 6-2 | 71-64 | 3 | 19,808 | Chris Nabholz | Jose DeLeon | Chris Nabholz | Jose DeLeon | Tim Burke | 555 | 500 | 55 |
| 1990-09-06 | @ SLN | 136 | L 2-4 | 71-65 | 3 | 10,897 | Mark Gardner | Ken Hill | Ken Dayley | Mark Gardner | Lee Smith | 557 | 504 | 53 |
| 1990-09-07 | @ PIT | 137 | W 4-1 | 72-65 | 3 | 22,083 | Oil Can Boyd | John Smiley | Oil Can Boyd | John Smiley | Tim Burke | 561 | 505 | 56 |
| 1990-09-08 | @ PIT | 138 | L 1-6 | 72-66 | 3 | 44,614 | Howard Farmer | Doug Drabek | Doug Drabek | Howard Farmer | | 562 | 511 | 51 |
| 1990-09-09 | @ PIT | 139 | W 9-5 | 73-66 | 3 | 22,023 | Dennis Martinez | Bob Walk | Mel Rojas | Bob Walk | | 571 | 516 | 55 |
| 1990-09-10 | @ CHN | 140 | W 7-4 | 74-66 | 3 | 26,774 | Chris Nabholz | Mitch Williams | Chris Nabholz | Bill Long | Tim Burke | 578 | 520 | 58 |
| 1990-09-11 | @ CHN | 141 | L 6-11 | 74-67 | 3 | 18,984 | Kevin Gross | Jose Nunez | Dave Pavlas | Kevin Gross | | 584 | 531 | 53 |
| 1990-09-12 | vs SLN | 142 | W 6-2 | 75-67 | 3 | 10,128 | Oil Can Boyd | Bob Tewksbury | Oil Can Boyd | Bob Tewksbury | | 590 | 533 | 57 |
| 1990-09-13 | vs SLN | 143 | L 4-6 | 75-68 | 3 | 9,185 | Bill Sampen | Omar Olivares | Omar Olivares | Bill Sampen | Lee Smith | 594 | 539 | 55 |
| 1990-09-14 | vs PIT | 144 | W 4-2 | 76-68 | 3 | 15,880 | Brian Barnes | Bob Walk | Steve Frey | Neal Heaton | | 598 | 541 | 57 |
| 1990-09-15 | vs PIT | 145 | W 4-3 | 77-68 | 3 | 20,392 | Chris Nabholz | Zane Smith | Bill Sampen | Zane Smith | Tim Burke | 602 | 544 | 58 |
| 1990-09-16 | vs PIT | 146 | W 4-1 | 78-68 | 3 | 21,286 | Scott Anderson | Randy Tomlin | Scott Ruskin | Randy Tomlin | Steve Frey | 606 | 545 | 61 |
| 1990-09-18 | @ NYN | 147 | W 4-3 | 79-68 | 3 | 29,435 | Oil Can Boyd | Dwight Gooden | Tim Burke | John Franco | | 610 | 548 | 62 |
| 1990-09-20 | @ NYN | 148 | W 6-4 | 81-68 | 3 | 0 | Brian Barnes | Frank Viola | Mel Rojas | Frank Viola | Tim Burke | 616 | 552 | 64 |
| 1990-09-20 | @ NYN | 149 | W 2-0 | 81-68 | 3 | 33,711 | Chris Nabholz | Sid Fernandez | Chris Nabholz | Sid Fernandez | | 618 | 552 | 66 |
| 1990-09-21 | @ PHI | 150 | L 4-5 | 81-69 | 3 | 23,274 | Dennis Martinez | Jose De Jesus | Chuck Malone | Bill Sampen | | 622 | 557 | 65 |
| 1990-09-22 | @ PHI | 151 | L 2-3 | 81-70 | 3 | 17,215 | Scott Anderson | Tommy Greene | Tommy Greene | Scott Anderson | Roger McDowell | 624 | 560 | 64 |
| 1990-09-23 | @ PHI | 152 | L 1-2 | 81-71 | 3 | 25,715 | Oil Can Boyd | Jason Grimsley | Don Carman | Howard Farmer | | 625 | 562 | 63 |
| 1990-09-24 | @ PHI | 153 | L 0-3 | 81-72 | 3 | 11,527 | Brian Barnes | Pat Combs | Pat Combs | Brian Barnes | | 625 | 565 | 60 |
| 1990-09-25 | vs NYN | 154 | L 1-3 | 81-73 | 3 | 11,959 | Chris Nabholz | Sid Fernandez | Alejandro Pena | Chris Nabholz | | 626 | 568 | 58 |
| 1990-09-26 | vs NYN | 155 | L 0-4 | 81-74 | 3 | 10,116 | Dennis Martinez | David Cone | David Cone | Dennis Martinez | | 626 | 572 | 54 |
| 1990-09-27 | vs NYN | 156 | L 0-6 | 81-75 | 3 | 10,123 | Kevin Gross | Ron Darling | Ron Darling | Kevin Gross | | 626 | 578 | 48 |
| 1990-09-28 | vs PHI | 157 | L 4-5 | 81-76 | 3 | 8,230 | Oil Can Boyd | Jason Grimsley | Jason Grimsley | Oil Can Boyd | Roger McDowell | 630 | 583 | 47 |
| 1990-09-29 | vs PHI | 158 | W 5-1 | 82-76 | 3 | 8,985 | Brian Barnes | Pat Combs | Brian Barnes | Pat Combs | | 635 | 584 | 51 |
| 1990-09-30 | vs PHI | 159 | L 1-2 | 82-77 | 3 | 17,464 | Chris Nabholz | Terry Mulholland | Terry Mulholland | Chris Nabholz | | 636 | 586 | 50 |
| 1990-10-01 | vs SLN | 160 | W 15-9 | 83-77 | 3 | 4,120 | Howard Farmer | Bryn Smith | Tim Burke | Ken Dayley | | 651 | 595 | 56 |
| 1990-10-02 | vs SLN | 161 | W 2-1 | 84-77 | 3 | 4,636 | Kevin Gross | Omar Olivares | Kevin Gross | Omar Olivares | Steve Frey | 653 | 596 | 57 |
| 1990-10-03 | vs SLN | 162 | W 9-2 | 85-77 | 3 | 4,262 | Scott Anderson | Ken Hill | Bill Sampen | Ken Hill | | 662 | 598 | 64 |