| 1983-04-05 | vs SDN | 1 | L 13-16 | 0-1 | 6 | 50,542 | Mike Krukow | Tim Lollar | Tim Lollar | Mike Krukow | Gary Lucas | 13 | 16 | -3 |
| 1983-04-06 | vs SDN | 2 | L 3-5 | 0-2 | 6 | 8,929 | Bill Laskey | Dave Dravecky | Dave Dravecky | Bill Laskey | | 16 | 21 | -5 |
| 1983-04-08 | vs PHI | 3 | W 3-2 | 1-2 | 5 | 13,624 | Fred Breining | Larry Christenson | Fred Breining | Larry Christenson | Greg Minton | 19 | 23 | -4 |
| 1983-04-09 | vs PHI | 4 | L 4-5 | 1-3 | 5 | 13,937 | Mike Krukow | Dick Ruthven | Sid Monge | Mike Krukow | Ron Reed | 23 | 28 | -5 |
| 1983-04-10 | vs PHI | 5 | L 2-10 | 1-4 | 5 | 20,988 | Bill Laskey | Steve Carlton | Steve Carlton | Bill Laskey | | 25 | 38 | -13 |
| 1983-04-12 | @ SDN | 6 | W 6-5 | 2-4 | 4 | 45,397 | Fred Breining | Dave Dravecky | Fred Breining | Dave Dravecky | Greg Minton | 31 | 43 | -12 |
| 1983-04-13 | @ SDN | 7 | L 1-2 | 2-5 | 5 | 15,494 | Atlee Hammaker | Eric Show | Eric Show | Atlee Hammaker | Gary Lucas | 32 | 45 | -13 |
| 1983-04-14 | @ SDN | 8 | L 4-6 | 2-6 | 5 | 20,407 | Andy McGaffigan | John Montefusco | John Montefusco | Andy McGaffigan | Gary Lucas | 36 | 51 | -15 |
| 1983-04-15 | vs CIN | 9 | L 1-3 | 2-7 | 5 | 6,891 | Bill Laskey | Bruce Berenyi | Rich Gale | Bill Laskey | Tom Hume | 37 | 54 | -17 |
| 1983-04-16 | vs CIN | 10 | L 3-8 | 2-8 | 5 | 7,620 | Fred Breining | Mario Soto | Mario Soto | Fred Breining | | 40 | 62 | -22 |
| 1983-04-17 | vs CIN | 11 | W 3-0 | 3-9 | 5 | 0 | Atlee Hammaker | Joe Price | Atlee Hammaker | Joe Price | | 43 | 62 | -19 |
| 1983-04-17 | vs CIN | 12 | L 3-12 | 3-9 | 5 | 37,094 | Mark Calvert | Frank Pastore | Frank Pastore | Mark Calvert | | 46 | 74 | -28 |
| 1983-04-18 | vs LAN | 13 | L 3-4 | 3-10 | 5 | 14,703 | Andy McGaffigan | Burt Hooton | Tom Niedenfuer | Greg Minton | Dave Stewart | 49 | 78 | -29 |
| 1983-04-20 | vs LAN | 14 | W 3-2 | 4-10 | 5 | 24,520 | Fred Breining | Fernando Valenzuela | Greg Minton | Fernando Valenzuela | | 52 | 80 | -28 |
| 1983-04-22 | @ CHN | 15 | L 2-7 | 4-11 | 5 | 6,630 | Bill Laskey | Fergie Jenkins | Fergie Jenkins | Bill Laskey | Guillermo Hernandez | 54 | 87 | -33 |
| 1983-04-23 | @ CHN | 16 | W 5-0 | 5-11 | 5 | 12,859 | Atlee Hammaker | Steve Trout | Atlee Hammaker | Steve Trout | | 59 | 87 | -28 |
| 1983-04-24 | @ CHN | 17 | L 1-5 | 5-12 | 5 | 9,388 | Andy McGaffigan | Paul Moskau | Paul Moskau | Andy McGaffigan | Lee Smith | 60 | 92 | -32 |
| 1983-04-26 | @ PIT | 18 | L 0-3 | 5-13 | 6 | 7,103 | Fred Breining | Larry McWilliams | Larry McWilliams | Fred Breining | | 60 | 95 | -35 |
| 1983-04-27 | @ PIT | 19 | W 3-2 | 6-13 | 6 | 5,267 | Bill Laskey | Rick Rhoden | Bill Laskey | Rick Rhoden | Greg Minton | 63 | 97 | -34 |
| 1983-04-29 | @ SLN | 20 | L 5-6 | 6-14 | 6 | 16,438 | Atlee Hammaker | Dave LaPoint | Doug Bair | Mark Calvert | | 68 | 103 | -35 |
| 1983-04-30 | @ SLN | 21 | W 5-0 | 7-14 | 6 | 36,904 | Andy McGaffigan | Joaquin Andujar | Andy McGaffigan | Joaquin Andujar | Gary Lavelle | 73 | 103 | -30 |
| 1983-05-01 | @ SLN | 22 | L 9-10 | 7-15 | 6 | 20,894 | Fred Breining | John Stuper | John Stuper | Fred Breining | Bruce Sutter | 82 | 113 | -31 |
| 1983-05-03 | vs CHN | 23 | W 5-4 | 8-15 | 6 | 6,483 | Bill Laskey | Steve Trout | Bill Laskey | Steve Trout | | 87 | 117 | -30 |
| 1983-05-04 | vs CHN | 24 | W 7-4 | 9-15 | 6 | 7,921 | Atlee Hammaker | Paul Moskau | Atlee Hammaker | Paul Moskau | | 94 | 121 | -27 |
| 1983-05-06 | vs PIT | 25 | W 2-1 | 10-15 | 6 | 16,476 | Andy McGaffigan | John Candelaria | Andy McGaffigan | John Candelaria | Gary Lavelle | 96 | 122 | -26 |
| 1983-05-07 | vs PIT | 26 | W 5-1 | 11-15 | 5 | 10,874 | Fred Breining | Rick Rhoden | Fred Breining | Rick Rhoden | | 101 | 123 | -22 |
| 1983-05-08 | vs PIT | 27 | W 12-1 | 12-15 | 5 | 19,123 | Bill Laskey | Jim Bibby | Bill Laskey | Jim Bibby | | 113 | 124 | -11 |
| 1983-05-09 | vs SLN | 28 | W 5-4 | 13-15 | 4 | 15,307 | Atlee Hammaker | Dave LaPoint | Gary Lavelle | Bruce Sutter | | 118 | 128 | -10 |
| 1983-05-10 | vs SLN | 29 | L 4-8 | 13-16 | 5 | 16,444 | Andy McGaffigan | John Martin | John Stuper | Andy McGaffigan | | 122 | 136 | -14 |
| 1983-05-12 | @ CIN | 30 | W 4-2 | 14-16 | 4 | 9,232 | Mike Krukow | Bruce Berenyi | Mike Krukow | Bruce Berenyi | Gary Lavelle | 126 | 138 | -12 |
| 1983-05-13 | @ CIN | 31 | W 8-5 | 15-16 | 3 | 15,241 | Fred Breining | Rich Gale | Fred Breining | Rich Gale | | 134 | 143 | -9 |
| 1983-05-14 | @ CIN | 32 | W 8-7 | 16-16 | 3 | 15,748 | Bill Laskey | Frank Pastore | Bill Laskey | Frank Pastore | Greg Minton | 142 | 150 | -8 |
| 1983-05-15 | @ CIN | 33 | W 5-2 | 17-16 | 3 | 21,642 | Atlee Hammaker | Ted Power | Atlee Hammaker | Tom Hume | Gary Lavelle | 147 | 152 | -5 |
| 1983-05-17 | @ PHI | 34 | L 1-2 | 17-17 | 3 | 21,123 | Andy McGaffigan | John Denny | John Denny | Andy McGaffigan | Al Holland | 148 | 154 | -6 |
| 1983-05-18 | @ PHI | 35 | W 8-1 | 18-17 | 3 | 20,987 | Mike Krukow | Dick Ruthven | Mike Krukow | Dick Ruthven | Greg Minton | 156 | 155 | 1 |
| 1983-05-20 | @ MON | 36 | L 1-7 | 18-18 | 3 | 25,143 | Fred Breining | Steve Rogers | Steve Rogers | Fred Breining | | 157 | 162 | -5 |
| 1983-05-21 | @ MON | 37 | W 5-2 | 19-18 | 3 | 28,129 | Bill Laskey | Scott Sanderson | Bill Laskey | Scott Sanderson | Gary Lavelle | 162 | 164 | -2 |
| 1983-05-22 | @ MON | 38 | L 0-2 | 19-19 | 3 | 30,734 | Atlee Hammaker | Charlie Lea | Charlie Lea | Atlee Hammaker | Jeff Reardon | 162 | 166 | -4 |
| 1983-05-23 | @ NYN | 39 | L 3-4 | 19-20 | 3 | 9,231 | Andy McGaffigan | Mike Torrez | Jesse Orosco | Greg Minton | | 165 | 170 | -5 |
| 1983-05-24 | @ NYN | 40 | W 6-2 | 20-20 | 3 | 11,511 | Mike Krukow | Ed Lynch | Mike Krukow | Ed Lynch | | 171 | 172 | -1 |
| 1983-05-25 | @ NYN | 41 | W 7-6 | 20-21 | 3 | 8,874 | Fred Breining | Neil Allen | Renie Martin | Neil Allen | Gary Lavelle | 178 | 178 | 0 |
| 1983-05-26 | @ LAN | 42 | W 5-3 | 21-21 | 3 | 40,133 | Bill Laskey | Jerry Reuss | Bill Laskey | Jerry Reuss | Greg Minton | 183 | 181 | 2 |
| 1983-05-27 | @ LAN | 43 | W 6-3 | 22-21 | 3 | 44,646 | Atlee Hammaker | Bob Welch | Atlee Hammaker | Bob Welch | Gary Lavelle | 189 | 184 | 5 |
| 1983-05-28 | @ LAN | 44 | L 0-5 | 22-22 | 3 | 49,302 | Andy McGaffigan | Fernando Valenzuela | Fernando Valenzuela | Andy McGaffigan | | 189 | 189 | 0 |
| 1983-05-29 | @ LAN | 45 | W 6-4 | 23-22 | 3 | 45,332 | Mike Krukow | Alejandro Pena | Gary Lavelle | Dave Stewart | | 195 | 193 | 2 |
| 1983-05-30 | vs NYN | 46 | W 5-0 | 24-22 | 3 | 29,863 | Fred Breining | Neil Allen | Fred Breining | Neil Allen | | 200 | 193 | 7 |
| 1983-05-31 | vs NYN | 47 | W 2-1 | 25-22 | 3 | 7,890 | Bill Laskey | Scott Holman | Bill Laskey | Scott Holman | Gary Lavelle | 202 | 194 | 8 |
| 1983-06-01 | vs NYN | 48 | W 4-2 | 26-22 | 3 | 10,234 | Atlee Hammaker | Tom Seaver | Atlee Hammaker | Tom Seaver | Jim Barr | 206 | 196 | 10 |
| 1983-06-02 | vs MON | 49 | L 4-11 | 26-23 | 3 | 9,674 | Andy McGaffigan | Charlie Lea | Ray Burris | Andy McGaffigan | | 210 | 207 | 3 |
| 1983-06-03 | vs MON | 50 | L 2-9 | 26-24 | 3 | 14,924 | Mike Krukow | Bill Gullickson | Bill Gullickson | Mike Krukow | | 212 | 216 | -4 |
| 1983-06-04 | vs MON | 51 | W 4-2 | 27-24 | 3 | 15,130 | Fred Breining | Steve Rogers | Gary Lavelle | Jeff Reardon | | 216 | 218 | -2 |
| 1983-06-05 | vs MON | 52 | L 9-12 | 27-25 | 3 | 22,222 | Bill Laskey | Chris Welsh | Dan Schatzeder | Bill Laskey | | 225 | 230 | -5 |
| 1983-06-07 | @ HOU | 53 | L 2-4 | 27-26 | 3 | 16,464 | Atlee Hammaker | Nolan Ryan | Frank LaCorte | Atlee Hammaker | Frank DiPino | 227 | 234 | -7 |
| 1983-06-08 | @ HOU | 54 | L 0-1 | 27-27 | 3 | 10,004 | Andy McGaffigan | Joe Niekro | Bill Dawley | Gary Lavelle | | 227 | 235 | -8 |
| 1983-06-09 | @ HOU | 55 | L 0-3 | 27-28 | 3 | 10,701 | Mike Krukow | Bob Knepper | Bob Knepper | Mike Krukow | | 227 | 238 | -11 |
| 1983-06-10 | @ ATL | 56 | W 6-4 | 28-29 | 3 | 0 | Fred Breining | Phil Niekro | Gary Lavelle | Rick Camp | Greg Minton | 233 | 242 | -9 |
| 1983-06-10 | @ ATL | 57 | L 3-7 | 28-29 | 3 | 38,550 | Bill Laskey | Pete Falcone | Pete Falcone | Bill Laskey | Donnie Moore | 236 | 249 | -13 |
| 1983-06-11 | @ ATL | 58 | W 7-6 | 29-29 | 3 | 48,381 | Atlee Hammaker | Rick Behenna | Atlee Hammaker | Gene Garber | Gary Lavelle | 243 | 255 | -12 |
| 1983-06-12 | @ ATL | 59 | L 2-3 | 29-30 | 3 | 24,676 | Andy McGaffigan | Pascual Perez | Pascual Perez | Andy McGaffigan | Gene Garber | 245 | 258 | -13 |
| 1983-06-14 | vs HOU | 60 | L 2-3 | 29-31 | 4 | 8,361 | Mike Krukow | Bob Knepper | Dave Smith | Greg Minton | | 247 | 261 | -14 |
| 1983-06-15 | vs HOU | 61 | W 7-1 | 30-31 | 4 | 10,555 | Fred Breining | Mike LaCoss | Fred Breining | Mike LaCoss | | 254 | 262 | -8 |
| 1983-06-16 | vs HOU | 62 | L 2-7 | 30-32 | 4 | 7,879 | Bill Laskey | Mike Scott | Mike Scott | Bill Laskey | Frank DiPino | 256 | 269 | -13 |
| 1983-06-17 | vs ATL | 63 | W 2-1 | 31-32 | 4 | 16,871 | Atlee Hammaker | Pascual Perez | Atlee Hammaker | Pascual Perez | Greg Minton | 258 | 270 | -12 |
| 1983-06-18 | vs ATL | 64 | W 5-4 | 32-32 | 4 | 20,055 | Andy McGaffigan | Ken Dayley | Gary Lavelle | Gene Garber | | 263 | 274 | -11 |
| 1983-06-19 | vs ATL | 65 | W 9-6 | 33-32 | 3 | 48,811 | Mike Krukow | Craig McMurtry | Mike Krukow | Craig McMurtry | Gary Lavelle | 272 | 280 | -8 |
| 1983-06-20 | vs CIN | 66 | W 4-3 | 34-32 | 3 | 23,280 | Fred Breining | Charlie Puleo | Greg Minton | Ted Power | | 276 | 283 | -7 |
| 1983-06-21 | vs CIN | 67 | L 5-6 | 34-33 | 3 | 8,943 | Bill Laskey | Frank Pastore | Ted Power | Jim Barr | | 281 | 289 | -8 |
| 1983-06-22 | vs CIN | 68 | L 2-4 | 34-34 | 5 | 18,043 | Mark Davis | Mario Soto | Mario Soto | Mark Davis | | 283 | 293 | -10 |
| 1983-06-24 | vs SDN | 69 | W 5-0 | 35-34 | 4 | 13,966 | Mike Krukow | Andy Hawkins | Mike Krukow | Andy Hawkins | | 288 | 293 | -5 |
| 1983-06-25 | vs SDN | 70 | L 2-3 | 35-35 | 4 | 17,082 | Fred Breining | Ed Whitson | John Montefusco | Gary Lavelle | Gary Lucas | 290 | 296 | -6 |
| 1983-06-26 | vs SDN | 71 | W 2-0 | 37-35 | 3 | 0 | Atlee Hammaker | Tim Lollar | Atlee Hammaker | Tim Lollar | | 292 | 296 | -4 |
| 1983-06-26 | vs SDN | 72 | W 4-3 | 37-35 | 3 | 28,607 | Bill Laskey | Eric Show | Bill Laskey | Eric Show | Gary Lavelle | 296 | 299 | -3 |
| 1983-06-28 | @ CIN | 73 | L 4-5 | 37-36 | 3 | 10,382 | Mark Davis | Joe Price | Ted Power | Greg Minton | Ben Hayes | 300 | 304 | -4 |
| 1983-06-29 | @ CIN | 74 | L 6-7 | 37-37 | 4 | 12,339 | Mike Krukow | Bruce Berenyi | Ted Power | Greg Minton | | 306 | 311 | -5 |
| 1983-06-30 | @ CIN | 75 | L 5-15 | 37-38 | 4 | 8,680 | Fred Breining | Charlie Puleo | Charlie Puleo | Fred Breining | Ted Power | 311 | 326 | -15 |
| 1983-07-01 | @ SDN | 76 | W 4-3 | 38-38 | 4 | 15,090 | Bill Laskey | Tim Lollar | Bill Laskey | Tim Lollar | Jim Barr | 315 | 329 | -14 |
| 1983-07-02 | @ SDN | 77 | L 4-5 | 38-39 | 4 | 18,177 | Atlee Hammaker | Eric Show | Gary Lucas | Atlee Hammaker | | 319 | 334 | -15 |
| 1983-07-03 | @ SDN | 78 | L 1-4 | 38-40 | 5 | 20,391 | Mark Davis | Dave Dravecky | Dave Dravecky | Mark Davis | | 320 | 338 | -18 |
| 1983-07-04 | @ SDN | 79 | L 3-4 | 38-41 | 5 | 44,519 | Mike Krukow | Mark Thurmond | Mark Thurmond | Mike Krukow | Gary Lucas | 323 | 342 | -19 |
| 1983-07-08 | vs CHN | 80 | W 4-1 | 39-41 | 5 | 10,094 | Bill Laskey | Dickie Noles | Bill Laskey | Dickie Noles | Gary Lavelle | 327 | 343 | -16 |
| 1983-07-09 | vs CHN | 81 | L 2-4 | 39-42 | 5 | 13,335 | Mark Davis | Chuck Rainey | Chuck Rainey | Mark Davis | Lee Smith | 329 | 347 | -18 |
| 1983-07-10 | vs CHN | 82 | W 10-8 | 41-42 | 5 | 0 | Mike Krukow | Steve Trout | Gary Lavelle | Bill Campbell | Renie Martin | 339 | 355 | -16 |
| 1983-07-10 | vs CHN | 83 | W 4-2 | 41-42 | 5 | 26,563 | Atlee Hammaker | Dick Ruthven | Atlee Hammaker | Dick Ruthven | | 343 | 357 | -14 |
| 1983-07-11 | vs PIT | 84 | L 2-3 | 41-43 | 5 | 18,429 | Fred Breining | Don Robinson | Manny Sarmiento | Fred Breining | Rod Scurry | 345 | 360 | -15 |
| 1983-07-12 | vs PIT | 85 | L 2-6 | 41-44 | 5 | 7,789 | Bill Laskey | Lee Tunnell | Lee Tunnell | Bill Laskey | Cecilio Guante | 347 | 366 | -19 |
| 1983-07-13 | vs PIT | 86 | L 6-7 | 41-45 | 5 | 14,316 | Mark Davis | John Candelaria | Manny Sarmiento | Greg Minton | Kent Tekulve | 353 | 373 | -20 |
| 1983-07-14 | vs SLN | 87 | L 5-6 | 41-46 | 5 | 8,669 | Mike Krukow | Dave LaPoint | Dave LaPoint | Gary Lavelle | Bruce Sutter | 358 | 379 | -21 |
| 1983-07-15 | vs SLN | 88 | W 5-4 | 42-46 | 5 | 13,168 | Atlee Hammaker | Joaquin Andujar | Jim Barr | Joaquin Andujar | Greg Minton | 363 | 383 | -20 |
| 1983-07-16 | vs SLN | 89 | L 3-9 | 42-47 | 5 | 39,692 | Fred Breining | Bob Forsch | Jeff Lahti | Fred Breining | Dave Von Ohlen | 366 | 392 | -26 |
| 1983-07-17 | vs SLN | 90 | W 3-1 | 43-47 | 5 | 25,819 | Bill Laskey | John Stuper | Bill Laskey | John Stuper | | 369 | 393 | -24 |
| 1983-07-19 | @ CHN | 91 | W 4-3 | 44-47 | 5 | 19,400 | Mark Davis | Chuck Rainey | Greg Minton | Bill Campbell | | 373 | 396 | -23 |
| 1983-07-20 | @ CHN | 92 | W 4-3 | 45-47 | 5 | 27,135 | Mike Krukow | Steve Trout | Greg Minton | Lee Smith | | 377 | 399 | -22 |
| 1983-07-21 | @ CHN | 93 | L 2-3 | 45-48 | 5 | 25,664 | Atlee Hammaker | Dick Ruthven | Dick Ruthven | Atlee Hammaker | Lee Smith | 379 | 402 | -23 |
| 1983-07-22 | @ PIT | 94 | W 5-3 | 46-48 | 5 | 23,834 | Fred Breining | Lee Tunnell | Jim Barr | Rod Scurry | Greg Minton | 384 | 405 | -21 |
| 1983-07-23 | @ PIT | 95 | L 2-5 | 46-49 | 5 | 14,585 | Bill Laskey | Jose DeLeon | Jose DeLeon | Renie Martin | Rod Scurry | 386 | 410 | -24 |
| 1983-07-24 | @ PIT | 96 | L 1-3 | 47-50 | 5 | 0 | Mike Krukow | John Candelaria | Rod Scurry | Mike Krukow | Kent Tekulve | 387 | 413 | -26 |
| 1983-07-24 | @ PIT | 97 | W 8-5 | 47-50 | 5 | 39,660 | Mark Davis | Larry McWilliams | Greg Minton | Rod Scurry | Andy McGaffigan | 395 | 418 | -23 |
| 1983-07-25 | @ SLN | 98 | L 4-9 | 47-51 | 5 | 25,158 | Andy McGaffigan | Dave LaPoint | Dave LaPoint | Andy McGaffigan | | 399 | 427 | -28 |
| 1983-07-26 | @ SLN | 99 | L 5-6 | 47-52 | 5 | 27,226 | Fred Breining | Joaquin Andujar | Dave Rucker | Greg Minton | | 404 | 433 | -29 |
| 1983-07-27 | @ SLN | 100 | L 6-7 | 47-53 | 5 | 31,616 | Renie Martin | John Martin | Dave Von Ohlen | Jim Barr | Bruce Sutter | 410 | 440 | -30 |
| 1983-07-29 | vs LAN | 101 | W 5-2 | 48-53 | 5 | 36,557 | Mike Krukow | Alejandro Pena | Mike Krukow | Alejandro Pena | Greg Minton | 415 | 442 | -27 |
| 1983-07-30 | vs LAN | 102 | W 8-0 | 49-53 | 5 | 38,771 | Mark Davis | Jerry Reuss | Mark Davis | Jerry Reuss | | 423 | 442 | -19 |
| 1983-07-31 | vs LAN | 103 | L 1-2 | 50-54 | 5 | 0 | Fred Breining | Burt Hooton | Tom Niedenfuer | Fred Breining | Steve Howe | 424 | 444 | -20 |
| 1983-07-31 | vs LAN | 104 | W 8-6 | 50-54 | 5 | 53,178 | Renie Martin | Fernando Valenzuela | Jim Barr | Fernando Valenzuela | Greg Minton | 432 | 450 | -18 |
| 1983-08-01 | vs ATL | 105 | L 3-8 | 50-55 | 5 | 23,822 | Andy McGaffigan | Rick Camp | Rick Camp | Andy McGaffigan | | 435 | 458 | -23 |
| 1983-08-02 | vs ATL | 106 | W 7-3 | 51-55 | 5 | 8,276 | Mike Krukow | Pascual Perez | Mike Krukow | Pascual Perez | Greg Minton | 442 | 461 | -19 |
| 1983-08-03 | vs ATL | 107 | L 4-6 | 51-56 | 5 | 20,015 | Mark Davis | Ken Dayley | Steve Bedrosian | Jim Barr | | 446 | 467 | -21 |
| 1983-08-04 | vs ATL | 108 | L 1-8 | 51-57 | 5 | 10,004 | Fred Breining | Phil Niekro | Phil Niekro | Fred Breining | | 447 | 475 | -28 |
| 1983-08-05 | vs HOU | 109 | W 7-1 | 52-57 | 5 | 6,212 | Bill Laskey | Bob Knepper | Bill Laskey | Bob Knepper | | 454 | 476 | -22 |
| 1983-08-06 | vs HOU | 110 | L 2-4 | 52-58 | 5 | 9,859 | Renie Martin | Mike Madden | Mike Madden | Renie Martin | Bill Dawley | 456 | 480 | -24 |
| 1983-08-07 | vs HOU | 111 | L 1-2 | 52-59 | 5 | 21,599 | Mike Krukow | Nolan Ryan | Nolan Ryan | Greg Minton | | 457 | 482 | -25 |
| 1983-08-09 | @ ATL | 112 | L 2-7 | 52-60 | 5 | 32,416 | Mark Davis | Phil Niekro | Phil Niekro | Mark Calvert | | 459 | 489 | -30 |
| 1983-08-10 | @ ATL | 113 | W 7-4 | 53-60 | 5 | 29,103 | Fred Breining | Craig McMurtry | Greg Minton | Steve Bedrosian | Gary Lavelle | 466 | 493 | -27 |
| 1983-08-11 | @ ATL | 114 | L 4-6 | 53-61 | 5 | 31,214 | Bill Laskey | Ken Dayley | Ken Dayley | Bill Laskey | Gene Garber | 470 | 499 | -29 |
| 1983-08-12 | @ HOU | 115 | L 2-5 | 53-62 | 5 | 27,814 | Renie Martin | Nolan Ryan | Nolan Ryan | Renie Martin | Frank DiPino | 472 | 504 | -32 |
| 1983-08-13 | @ HOU | 116 | L 1-4 | 53-63 | 6 | 15,547 | Mike Krukow | Joe Niekro | Joe Niekro | Mike Krukow | Bill Dawley | 473 | 508 | -35 |
| 1983-08-14 | @ HOU | 117 | W 5-2 | 54-63 | 5 | 16,923 | Mark Davis | Mike Madden | Mark Davis | Mike Madden | Gary Lavelle | 478 | 510 | -32 |
| 1983-08-15 | @ LAN | 118 | W 7-3 | 55-63 | 5 | 40,913 | Fred Breining | Burt Hooton | Fred Breining | Burt Hooton | | 485 | 513 | -28 |
| 1983-08-16 | @ LAN | 119 | L 1-5 | 55-64 | 5 | 41,339 | Bill Laskey | Jerry Reuss | Jerry Reuss | Bill Laskey | | 486 | 518 | -32 |
| 1983-08-17 | vs MON | 120 | L 5-12 | 55-65 | 5 | 5,299 | Renie Martin | Steve Rogers | Steve Rogers | Renie Martin | | 491 | 530 | -39 |
| 1983-08-18 | vs MON | 121 | W 5-3 | 56-65 | 5 | 4,518 | Mike Krukow | Bryn Smith | Mike Krukow | Bryn Smith | Greg Minton | 496 | 533 | -37 |
| 1983-08-19 | vs NYN | 122 | L 6-7 | 56-66 | 5 | 5,829 | Mark Davis | Tom Seaver | Jesse Orosco | Greg Minton | | 502 | 540 | -38 |
| 1983-08-20 | vs NYN | 123 | L 2-7 | 56-67 | 5 | 23,319 | Fred Breining | Ed Lynch | Ed Lynch | Fred Breining | | 504 | 547 | -43 |
| 1983-08-21 | vs NYN | 124 | L 3-4 | 56-68 | 6 | 12,020 | Atlee Hammaker | Mike Torrez | Mike Torrez | Atlee Hammaker | Jesse Orosco | 507 | 551 | -44 |
| 1983-08-22 | vs PHI | 125 | W 11-5 | 57-68 | 5 | 16,048 | Bill Laskey | Charles Hudson | Bill Laskey | Charles Hudson | Gary Lavelle | 518 | 556 | -38 |
| 1983-08-23 | vs PHI | 126 | W 3-1 | 58-68 | 5 | 6,885 | Mike Krukow | John Denny | Mike Krukow | Al Holland | Greg Minton | 521 | 557 | -36 |
| 1983-08-24 | vs PHI | 127 | W 5-3 | 59-68 | 5 | 14,317 | Mark Davis | Steve Carlton | Renie Martin | Steve Carlton | | 526 | 560 | -34 |
| 1983-08-26 | @ NYN | 128 | W 12-1 | 60-68 | 5 | 29,840 | Fred Breining | Ed Lynch | Fred Breining | Ed Lynch | | 538 | 561 | -23 |
| 1983-08-27 | @ NYN | 129 | L 3-6 | 60-69 | 5 | 14,172 | Atlee Hammaker | Mike Torrez | Mike Torrez | Atlee Hammaker | Jesse Orosco | 541 | 567 | -26 |
| 1983-08-28 | @ NYN | 130 | W 7-2 | 61-69 | 5 | 14,163 | Bill Laskey | Craig Swan | Jim Barr | Craig Swan | Gary Lavelle | 548 | 569 | -21 |
| 1983-08-29 | @ MON | 131 | L 0-5 | 61-70 | 5 | 30,485 | Mike Krukow | Bryn Smith | Bryn Smith | Mike Krukow | | 548 | 574 | -26 |
| 1983-08-30 | @ MON | 132 | W 13-2 | 62-70 | 5 | 29,536 | Mark Davis | Ray Burris | Mark Davis | Ray Burris | Greg Minton | 561 | 576 | -15 |
| 1983-08-31 | @ MON | 133 | L 3-4 | 62-71 | 5 | 22,883 | Fred Breining | Bill Gullickson | Bill Gullickson | Fred Breining | Jeff Reardon | 564 | 580 | -16 |
| 1983-09-01 | @ PHI | 134 | L 2-4 | 62-72 | 5 | 16,022 | Atlee Hammaker | Tony Ghelfi | Tony Ghelfi | Atlee Hammaker | Al Holland | 566 | 584 | -18 |
| 1983-09-02 | @ PHI | 135 | L 3-5 | 62-73 | 5 | 22,916 | Renie Martin | John Denny | Ron Reed | Gary Lavelle | | 569 | 589 | -20 |
| 1983-09-03 | @ PHI | 136 | W 5-4 | 63-73 | 5 | 26,529 | Mike Krukow | Steve Carlton | Mike Krukow | Steve Carlton | Greg Minton | 574 | 593 | -19 |
| 1983-09-04 | @ PHI | 137 | W 10-4 | 64-73 | 5 | 24,385 | Mark Davis | Kevin Gross | Andy McGaffigan | Kevin Gross | Greg Minton | 584 | 597 | -13 |
| 1983-09-05 | vs CIN | 138 | W 3-2 | 65-73 | 5 | 12,446 | Fred Breining | Jeff Russell | Fred Breining | Jeff Russell | Greg Minton | 587 | 599 | -12 |
| 1983-09-06 | vs CIN | 139 | L 1-11 | 65-74 | 5 | 3,562 | Atlee Hammaker | Bruce Berenyi | Bruce Berenyi | Atlee Hammaker | Rich Gale | 588 | 610 | -22 |
| 1983-09-07 | vs ATL | 140 | W 2-1 | 66-74 | 5 | 4,919 | Scott Garrelts | Pascual Perez | Scott Garrelts | Pascual Perez | Gary Lavelle | 590 | 611 | -21 |
| 1983-09-08 | vs ATL | 141 | L 9-12 | 66-75 | 5 | 3,720 | Mike Krukow | Ken Dayley | Gene Garber | Greg Minton | | 599 | 623 | -24 |
| 1983-09-09 | vs HOU | 142 | L 4-7 | 66-76 | 5 | 4,195 | Mark Davis | Joe Niekro | Joe Niekro | Mark Davis | Frank DiPino | 603 | 630 | -27 |
| 1983-09-10 | vs HOU | 143 | L 3-5 | 66-77 | 5 | 6,030 | Fred Breining | Bob Knepper | Jeff Heathcock | Fred Breining | | 606 | 635 | -29 |
| 1983-09-11 | vs HOU | 144 | W 3-2 | 67-77 | 5 | 9,265 | Atlee Hammaker | Nolan Ryan | Greg Minton | Nolan Ryan | | 609 | 637 | -28 |
| 1983-09-13 | @ SDN | 145 | L 3-4 | 67-78 | 5 | 7,612 | Scott Garrelts | Ed Whitson | Sid Monge | Greg Minton | | 612 | 641 | -29 |
| 1983-09-14 | @ SDN | 146 | L 4-7 | 67-79 | 6 | 19,763 | Mike Krukow | Eric Show | Eric Show | Mike Krukow | Gary Lucas | 616 | 648 | -32 |
| 1983-09-16 | vs LAN | 147 | W 1-0 | 68-79 | 6 | 22,220 | Mark Davis | Fernando Valenzuela | Mark Davis | Fernando Valenzuela | | 617 | 648 | -31 |
| 1983-09-17 | vs LAN | 148 | W 4-1 | 69-79 | 5 | 23,982 | Fred Breining | Rick Honeycutt | Fred Breining | Rick Honeycutt | | 621 | 649 | -28 |
| 1983-09-18 | vs LAN | 149 | W 6-3 | 70-79 | 5 | 35,370 | Mike Krukow | Jerry Reuss | Mike Krukow | Jerry Reuss | Gary Lavelle | 627 | 652 | -25 |
| 1983-09-19 | vs SDN | 150 | L 2-4 | 70-80 | 5 | 2,486 | Scott Garrelts | Ed Whitson | Ed Whitson | Scott Garrelts | Floyd Chiffer | 629 | 656 | -27 |
| 1983-09-20 | vs SDN | 151 | W 8-1 | 71-80 | 5 | 4,341 | Mark Calvert | Eric Show | Mark Calvert | Eric Show | Andy McGaffigan | 637 | 657 | -20 |
| 1983-09-21 | vs SDN | 152 | W 5-4 | 72-80 | 5 | 5,294 | Mark Davis | Tim Lollar | Gary Lavelle | Gary Lucas | | 642 | 661 | -19 |
| 1983-09-23 | @ HOU | 153 | W 3-2 | 73-80 | 5 | 10,570 | Fred Breining | Joe Niekro | Fred Breining | Joe Niekro | Greg Minton | 645 | 663 | -18 |
| 1983-09-24 | @ HOU | 154 | L 5-6 | 73-81 | 5 | 12,619 | Mike Krukow | Mike Scott | Mike Scott | Mike Krukow | Frank DiPino | 650 | 669 | -19 |
| 1983-09-25 | @ HOU | 155 | W 3-0 | 74-81 | 5 | 6,130 | Scott Garrelts | Nolan Ryan | Scott Garrelts | Nolan Ryan | | 653 | 669 | -16 |
| 1983-09-26 | @ ATL | 156 | L 2-6 | 74-82 | 5 | 14,710 | Mark Calvert | Phil Niekro | Phil Niekro | Mark Calvert | Gene Garber | 655 | 675 | -20 |
| 1983-09-27 | @ ATL | 157 | W 6-2 | 75-82 | 5 | 29,838 | Mark Davis | Len Barker | Mark Davis | Steve Bedrosian | Greg Minton | 661 | 677 | -16 |
| 1983-09-28 | @ CIN | 158 | L 4-5 | 75-83 | 5 | 7,007 | Mike Krukow | Mario Soto | Mario Soto | Mike Krukow | | 665 | 682 | -17 |
| 1983-09-29 | @ CIN | 159 | W 11-7 | 76-83 | 5 | 8,067 | Mark Calvert | Bruce Berenyi | Randy Lerch | Ben Hayes | Greg Minton | 676 | 689 | -13 |
| 1983-09-30 | @ LAN | 160 | L 3-4 | 76-84 | 5 | 42,928 | Scott Garrelts | Fernando Valenzuela | Fernando Valenzuela | Scott Garrelts | Orel Hershiser | 679 | 693 | -14 |
| 1983-10-01 | @ LAN | 161 | W 4-1 | 77-84 | 5 | 34,707 | Mark Davis | Burt Hooton | Mark Davis | Burt Hooton | Gary Lavelle | 683 | 694 | -11 |
| 1983-10-02 | @ LAN | 162 | W 4-3 | 78-84 | 5 | 47,007 | Mike Krukow | Sid Fernandez | Jim Barr | Sid Fernandez | Gary Lavelle | 687 | 697 | -10 |