| 1983-04-05 | vs PIT | 1 | L 1-7 | 0-1 | 6 | 43,509 | Bob Forsch | John Candelaria | John Candelaria | Bob Forsch | | 1 | 7 | -6 |
| 1983-04-09 | @ NYN | 2 | W 5-0 | 1-1 | 4 | 11,511 | Joaquin Andujar | Mike Torrez | Joaquin Andujar | Mike Torrez | | 6 | 7 | -1 |
| 1983-04-12 | @ PIT | 3 | W 4-3 | 2-1 | 3 | 46,869 | Dave LaPoint | Rick Rhoden | Bruce Sutter | Jim Bibby | Eric Rasmussen | 10 | 10 | 0 |
| 1983-04-13 | @ PIT | 4 | W 9-1 | 3-1 | 1 | 4,126 | Joaquin Andujar | Lee Tunnell | Joaquin Andujar | Lee Tunnell | | 19 | 11 | 8 |
| 1983-04-14 | vs NYN | 5 | W 7-1 | 4-1 | 1 | 11,941 | Bob Forsch | Mike Torrez | Bob Forsch | Mike Torrez | | 26 | 12 | 14 |
| 1983-04-15 | vs NYN | 6 | W 5-2 | 5-1 | 1 | 20,443 | John Stuper | Scott Holman | John Stuper | Scott Holman | Bruce Sutter | 31 | 14 | 17 |
| 1983-04-16 | vs NYN | 7 | W 6-2 | 6-1 | 1 | 27,137 | Dave LaPoint | Ed Lynch | Dave LaPoint | Ed Lynch | | 37 | 16 | 21 |
| 1983-04-21 | @ MON | 8 | L 5-6 | 6-2 | 1 | 8,392 | Joaquin Andujar | Scott Sanderson | Scott Sanderson | Joaquin Andujar | | 42 | 22 | 20 |
| 1983-04-22 | vs SDN | 9 | L 1-4 | 6-3 | 3 | 16,410 | Bob Forsch | Dave Dravecky | Dave Dravecky | Bob Forsch | | 43 | 26 | 17 |
| 1983-04-23 | vs SDN | 10 | W 9-5 | 7-3 | 1 | 40,938 | John Stuper | Eric Show | John Martin | Eric Show | | 52 | 31 | 21 |
| 1983-04-24 | vs SDN | 11 | W 2-0 | 8-3 | 1 | 27,059 | Dave LaPoint | Andy Hawkins | Dave LaPoint | Andy Hawkins | Bruce Sutter | 54 | 31 | 23 |
| 1983-04-25 | vs LAN | 12 | L 0-8 | 8-4 | 2 | 33,265 | Joaquin Andujar | Fernando Valenzuela | Fernando Valenzuela | Joaquin Andujar | | 54 | 39 | 15 |
| 1983-04-26 | vs LAN | 13 | L 1-3 | 8-5 | 2 | 17,492 | John Stuper | Burt Hooton | Burt Hooton | John Stuper | Steve Howe | 55 | 42 | 13 |
| 1983-04-27 | vs LAN | 14 | W 7-6 | 9-5 | 1 | 23,712 | Bob Forsch | Jerry Reuss | Bruce Sutter | Alejandro Pena | | 62 | 48 | 14 |
| 1983-04-29 | vs SFN | 15 | W 6-5 | 10-5 | 1 | 16,438 | Dave LaPoint | Atlee Hammaker | Doug Bair | Mark Calvert | | 68 | 53 | 15 |
| 1983-04-30 | vs SFN | 16 | L 0-5 | 10-6 | 1 | 36,904 | Joaquin Andujar | Andy McGaffigan | Andy McGaffigan | Joaquin Andujar | Gary Lavelle | 68 | 58 | 10 |
| 1983-05-01 | vs SFN | 17 | W 10-9 | 11-6 | 1 | 20,894 | John Stuper | Fred Breining | John Stuper | Fred Breining | Bruce Sutter | 78 | 67 | 11 |
| 1983-05-03 | @ SDN | 18 | L 3-4 | 11-7 | 2 | 16,842 | Bob Forsch | Dave Dravecky | Dave Dravecky | Bob Forsch | Gary Lucas | 81 | 71 | 10 |
| 1983-05-04 | @ SDN | 19 | L 0-10 | 11-8 | 2 | 17,119 | Joaquin Andujar | Eric Show | Eric Show | Joaquin Andujar | | 81 | 81 | 0 |
| 1983-05-05 | @ SDN | 20 | W 4-3 | 12-8 | 2 | 21,943 | Dave LaPoint | Andy Hawkins | Bruce Sutter | Gary Lucas | | 85 | 84 | 1 |
| 1983-05-06 | @ LAN | 21 | L 10-16 | 12-9 | 2 | 50,993 | John Stuper | Fernando Valenzuela | Dave Stewart | Jeff Lahti | Tom Niedenfuer | 95 | 100 | -5 |
| 1983-05-07 | @ LAN | 22 | L 3-5 | 12-10 | 3 | 48,950 | Bob Forsch | Burt Hooton | Steve Howe | Doug Bair | | 98 | 105 | -7 |
| 1983-05-08 | @ LAN | 23 | L 4-6 | 12-11 | 3 | 41,645 | Joaquin Andujar | Jerry Reuss | Jerry Reuss | Joaquin Andujar | Steve Howe | 102 | 111 | -9 |
| 1983-05-09 | @ SFN | 24 | L 4-5 | 12-12 | 3 | 15,307 | Dave LaPoint | Atlee Hammaker | Gary Lavelle | Bruce Sutter | | 106 | 116 | -10 |
| 1983-05-10 | @ SFN | 25 | W 8-4 | 13-12 | 3 | 16,444 | John Martin | Andy McGaffigan | John Stuper | Andy McGaffigan | | 114 | 120 | -6 |
| 1983-05-12 | vs MON | 26 | W 4-0 | 14-12 | 3 | 21,205 | Bob Forsch | Bill Gullickson | Bob Forsch | Bill Gullickson | | 118 | 120 | -2 |
| 1983-05-13 | vs MON | 27 | W 5-4 | 15-12 | 2 | 22,703 | Joaquin Andujar | Chris Welsh | John Martin | Bryn Smith | | 123 | 124 | -1 |
| 1983-05-14 | vs MON | 28 | W 3-2 | 16-12 | 2 | 25,887 | Dave LaPoint | Steve Rogers | Bruce Sutter | Jeff Reardon | | 126 | 126 | 0 |
| 1983-05-15 | vs MON | 29 | W 4-2 | 17-12 | 2 | 36,157 | John Stuper | Scott Sanderson | John Stuper | Scott Sanderson | | 130 | 128 | 2 |
| 1983-05-17 | vs HOU | 30 | W 8-4 | 18-12 | 2 | 40,740 | Bob Forsch | Joe Niekro | Bob Forsch | Joe Niekro | | 138 | 132 | 6 |
| 1983-05-18 | vs HOU | 31 | W 9-5 | 19-12 | 1 | 22,680 | Joaquin Andujar | Mike Scott | Joaquin Andujar | Frank DiPino | | 147 | 137 | 10 |
| 1983-05-20 | vs ATL | 32 | L 1-2 | 19-13 | 1 | 42,759 | Dave LaPoint | Craig McMurtry | Craig McMurtry | Dave LaPoint | Terry Forster | 148 | 139 | 9 |
| 1983-05-21 | vs ATL | 33 | L 1-4 | 19-14 | 1 | 42,854 | John Stuper | Phil Niekro | Steve Bedrosian | John Stuper | | 149 | 143 | 6 |
| 1983-05-22 | vs ATL | 34 | L 5-7 | 19-15 | 2 | 34,326 | Bob Forsch | Pascual Perez | Steve Bedrosian | Bruce Sutter | | 154 | 150 | 4 |
| 1983-05-23 | @ CIN | 35 | L 1-2 | 19-16 | 2 | 10,708 | Joaquin Andujar | Joe Price | Joe Price | Joaquin Andujar | Bill Scherrer | 155 | 152 | 3 |
| 1983-05-24 | @ CIN | 36 | W 7-1 | 20-16 | 1 | 12,855 | Dave LaPoint | Bruce Berenyi | Dave LaPoint | Bruce Berenyi | | 162 | 153 | 9 |
| 1983-05-25 | @ CIN | 37 | W 7-2 | 21-16 | 1 | 15,023 | John Stuper | Ted Power | John Stuper | Ted Power | | 169 | 155 | 14 |
| 1983-05-26 | @ HOU | 38 | W 5-3 | 22-16 | 1 | 10,884 | Bob Forsch | Mike LaCoss | Dave Von Ohlen | Mike LaCoss | Bruce Sutter | 174 | 158 | 16 |
| 1983-05-27 | @ HOU | 39 | W 3-1 | 23-16 | 1 | 12,651 | Joaquin Andujar | Vern Ruhle | Jeff Lahti | Bob Knepper | | 177 | 159 | 18 |
| 1983-05-28 | @ HOU | 40 | L 2-9 | 23-17 | 1 | 24,412 | John Martin | Joe Niekro | Joe Niekro | John Martin | | 179 | 168 | 11 |
| 1983-05-29 | @ HOU | 41 | W 7-3 | 24-17 | 1 | 19,600 | Dave LaPoint | Mike Scott | Dave LaPoint | Mike Scott | | 186 | 171 | 15 |
| 1983-05-30 | vs CIN | 42 | W 9-1 | 25-17 | 1 | 39,735 | John Stuper | Ted Power | John Stuper | Ted Power | | 195 | 172 | 23 |
| 1983-05-31 | vs CIN | 43 | L 1-2 | 25-18 | 1 | 29,428 | Joaquin Andujar | Charlie Puleo | Charlie Puleo | Joaquin Andujar | Bill Scherrer | 196 | 174 | 22 |
| 1983-06-01 | vs CIN | 44 | W 8-3 | 26-18 | 1 | 25,497 | John Martin | Mario Soto | John Martin | Mario Soto | | 204 | 177 | 27 |
| 1983-06-02 | @ ATL | 45 | L 1-8 | 26-19 | 1 | 18,756 | Bob Forsch | Pete Falcone | Pete Falcone | Bob Forsch | Terry Forster | 205 | 185 | 20 |
| 1983-06-03 | @ ATL | 46 | L 3-5 | 26-20 | 1 | 34,071 | Dave LaPoint | Rick Camp | Rick Camp | Dave LaPoint | Steve Bedrosian | 208 | 190 | 18 |
| 1983-06-04 | @ ATL | 47 | L 4-6 | 26-21 | 1 | 41,773 | Joaquin Andujar | Craig McMurtry | Donnie Moore | Joaquin Andujar | Terry Forster | 212 | 196 | 16 |
| 1983-06-05 | @ ATL | 48 | W 8-3 | 27-21 | 1 | 28,787 | John Stuper | Phil Niekro | John Stuper | Phil Niekro | Doug Bair | 220 | 199 | 21 |
| 1983-06-07 | @ PHI | 49 | W 2-1 | 28-21 | 1 | 34,274 | Bob Forsch | Steve Carlton | Bob Forsch | Steve Carlton | | 222 | 200 | 22 |
| 1983-06-08 | @ PHI | 50 | L 4-7 | 28-22 | 1 | 23,531 | Dave LaPoint | John Denny | Al Holland | Bruce Sutter | | 226 | 207 | 19 |
| 1983-06-09 | @ PHI | 51 | L 5-6 | 28-23 | 1 | 27,764 | Joaquin Andujar | Marty Bystrom | Ron Reed | Dave Von Ohlen | | 231 | 213 | 18 |
| 1983-06-10 | @ CHN | 52 | L 0-7 | 28-24 | 1 | 37,024 | John Stuper | Fergie Jenkins | Fergie Jenkins | John Stuper | | 231 | 220 | 11 |
| 1983-06-11 | @ CHN | 53 | W 5-4 | 29-24 | 1 | 40,448 | John Martin | Craig Lefferts | Bruce Sutter | Lee Smith | Joaquin Andujar | 236 | 224 | 12 |
| 1983-06-12 | @ CHN | 54 | L 3-6 | 29-25 | 1 | 38,635 | Bob Forsch | Chuck Rainey | Chuck Rainey | Bob Forsch | Lee Smith | 239 | 230 | 9 |
| 1983-06-13 | vs PHI | 55 | L 2-6 | 29-26 | 1 | 32,686 | Dave LaPoint | Marty Bystrom | Marty Bystrom | Dave LaPoint | Guillermo Hernandez | 241 | 236 | 5 |
| 1983-06-14 | vs PHI | 56 | W 5-4 | 30-26 | 1 | 28,813 | Joaquin Andujar | Charles Hudson | Bruce Sutter | Porfi Altamirano | | 246 | 240 | 6 |
| 1983-06-15 | vs PHI | 57 | W 7-6 | 31-26 | 1 | 37,368 | John Stuper | Steve Carlton | Kevin Hagen | Steve Carlton | Bruce Sutter | 253 | 246 | 7 |
| 1983-06-17 | vs CHN | 58 | W 7-2 | 32-26 | 1 | 41,093 | Bob Forsch | Chuck Rainey | Bob Forsch | Chuck Rainey | | 260 | 248 | 12 |
| 1983-06-18 | vs CHN | 59 | L 1-10 | 32-27 | 1 | 49,898 | Joaquin Andujar | Steve Trout | Steve Trout | Joaquin Andujar | | 261 | 258 | 3 |
| 1983-06-19 | vs CHN | 60 | L 1-4 | 32-28 | 2 | 38,995 | Dave LaPoint | Dick Ruthven | Dick Ruthven | Dave LaPoint | | 262 | 262 | 0 |
| 1983-06-20 | @ NYN | 61 | W 3-1 | 33-29 | 2 | 0 | Kevin Hagen | Craig Swan | Kevin Hagen | Craig Swan | Bruce Sutter | 265 | 263 | 2 |
| 1983-06-20 | @ NYN | 62 | L 4-6 | 33-29 | 2 | 16,668 | John Stuper | Walt Terrell | Walt Terrell | John Stuper | Jesse Orosco | 269 | 269 | 0 |
| 1983-06-21 | @ NYN | 63 | W 6-0 | 34-29 | 2 | 16,300 | Neil Allen | Tom Gorman | Neil Allen | Tom Gorman | | 275 | 269 | 6 |
| 1983-06-22 | @ NYN | 64 | L 4-6 | 34-31 | 2 | 0 | Bob Forsch | Tom Seaver | Tom Seaver | Bob Forsch | | 279 | 275 | 4 |
| 1983-06-22 | @ NYN | 65 | L 1-2 | 34-31 | 2 | 18,792 | Joaquin Andujar | Mike Torrez | Mike Torrez | Joaquin Andujar | Jesse Orosco | 280 | 277 | 3 |
| 1983-06-23 | @ NYN | 66 | L 5-7 | 34-32 | 2 | 9,128 | John Stuper | Ed Lynch | Carlos Diaz | Dave Von Ohlen | Doug Sisk | 285 | 284 | 1 |
| 1983-06-24 | vs PIT | 67 | L 2-8 | 34-33 | 2 | 39,475 | Dave LaPoint | Jim Bibby | Jim Bibby | Dave LaPoint | Manny Sarmiento | 287 | 292 | -5 |
| 1983-06-25 | vs PIT | 68 | L 3-10 | 34-34 | 2 | 29,567 | Kevin Hagen | Don Robinson | Lee Tunnell | Kevin Hagen | | 290 | 302 | -12 |
| 1983-06-26 | vs PIT | 69 | L 0-5 | 34-35 | 2 | 32,306 | Neil Allen | Rick Rhoden | Rick Rhoden | Neil Allen | | 290 | 307 | -17 |
| 1983-06-27 | vs PIT | 70 | L 1-6 | 34-36 | 2 | 23,286 | Joaquin Andujar | John Candelaria | Cecilio Guante | Joaquin Andujar | | 291 | 313 | -22 |
| 1983-06-28 | vs NYN | 71 | L 1-10 | 35-37 | 3 | 0 | Bob Forsch | Ed Lynch | Ed Lynch | Bob Forsch | | 292 | 323 | -31 |
| 1983-06-28 | vs NYN | 72 | W 8-1 | 35-37 | 3 | 30,810 | Dave LaPoint | Tom Gorman | Dave LaPoint | Tom Gorman | | 300 | 324 | -24 |
| 1983-06-29 | vs NYN | 73 | W 4-3 | 36-37 | 2 | 29,456 | Kevin Hagen | Craig Swan | Bruce Sutter | Jesse Orosco | | 304 | 327 | -23 |
| 1983-06-30 | vs NYN | 74 | W 6-1 | 37-37 | 3 | 30,951 | Neil Allen | Walt Terrell | Neil Allen | Walt Terrell | | 310 | 328 | -18 |
| 1983-07-01 | @ PIT | 75 | W 13-6 | 38-37 | 3 | 26,019 | Joaquin Andujar | Don Robinson | Joaquin Andujar | Don Robinson | | 323 | 334 | -11 |
| 1983-07-02 | @ PIT | 76 | L 1-3 | 38-38 | 3 | 27,446 | Dave LaPoint | John Candelaria | John Candelaria | Dave LaPoint | | 324 | 337 | -13 |
| 1983-07-03 | @ PIT | 77 | W 4-3 | 39-38 | 3 | 14,469 | Bob Forsch | Larry McWilliams | Bob Forsch | Manny Sarmiento | Bruce Sutter | 328 | 340 | -12 |
| 1983-07-04 | @ PIT | 78 | L 2-7 | 40-39 | 3 | 0 | Kevin Hagen | Rick Rhoden | Rick Rhoden | Kevin Hagen | | 330 | 347 | -17 |
| 1983-07-04 | @ PIT | 79 | W 11-4 | 40-39 | 3 | 22,185 | Neil Allen | Jim Bibby | Neil Allen | Jim Bibby | | 341 | 351 | -10 |
| 1983-07-08 | @ SDN | 80 | L 2-3 | 40-40 | 3 | 23,166 | Neil Allen | Tim Lollar | Gary Lucas | Bruce Sutter | | 343 | 354 | -11 |
| 1983-07-09 | @ SDN | 81 | W 12-4 | 41-40 | 3 | 25,125 | Dave LaPoint | Dave Dravecky | Dave LaPoint | Dave Dravecky | | 355 | 358 | -3 |
| 1983-07-10 | @ SDN | 82 | W 4-2 | 42-40 | 3 | 15,301 | Joaquin Andujar | Mark Thurmond | Dave Von Ohlen | Gary Lucas | Bruce Sutter | 359 | 360 | -1 |
| 1983-07-11 | @ LAN | 83 | L 6-7 | 42-41 | 3 | 47,087 | Bob Forsch | Fernando Valenzuela | Joe Beckwith | Bruce Sutter | | 365 | 367 | -2 |
| 1983-07-12 | @ LAN | 84 | L 1-3 | 42-42 | 3 | 44,515 | John Stuper | Bob Welch | Bob Welch | John Stuper | Steve Howe | 366 | 370 | -4 |
| 1983-07-13 | @ LAN | 85 | W 6-5 | 43-42 | 2 | 45,895 | Neil Allen | Jerry Reuss | Dave Rucker | Steve Howe | Bruce Sutter | 372 | 375 | -3 |
| 1983-07-14 | @ SFN | 86 | W 6-5 | 44-42 | 2 | 8,669 | Dave LaPoint | Mike Krukow | Dave LaPoint | Gary Lavelle | Bruce Sutter | 378 | 380 | -2 |
| 1983-07-15 | @ SFN | 87 | L 4-5 | 44-43 | 2 | 13,168 | Joaquin Andujar | Atlee Hammaker | Jim Barr | Joaquin Andujar | Greg Minton | 382 | 385 | -3 |
| 1983-07-16 | @ SFN | 88 | W 9-3 | 45-43 | 2 | 39,692 | Bob Forsch | Fred Breining | Jeff Lahti | Fred Breining | Dave Von Ohlen | 391 | 388 | 3 |
| 1983-07-17 | @ SFN | 89 | L 1-3 | 45-44 | 2 | 25,819 | John Stuper | Bill Laskey | Bill Laskey | John Stuper | | 392 | 391 | 1 |
| 1983-07-19 | vs SDN | 90 | W 4-0 | 46-44 | 1 | 31,395 | Neil Allen | Tim Lollar | Neil Allen | Tim Lollar | | 396 | 391 | 5 |
| 1983-07-20 | vs SDN | 91 | L 4-5 | 46-45 | 3 | 23,671 | Dave LaPoint | Dave Dravecky | Luis DeLeon | Bruce Sutter | Sid Monge | 400 | 396 | 4 |
| 1983-07-21 | vs SDN | 92 | L 2-4 | 46-46 | 3 | 22,289 | Joaquin Andujar | Mark Thurmond | Mark Thurmond | Joaquin Andujar | Luis DeLeon | 402 | 400 | 2 |
| 1983-07-22 | vs LAN | 93 | L 4-9 | 46-47 | 3 | 36,390 | Bob Forsch | Bob Welch | Bob Welch | Bob Forsch | | 406 | 409 | -3 |
| 1983-07-23 | vs LAN | 94 | L 5-10 | 46-48 | 4 | 45,356 | John Stuper | Alejandro Pena | Steve Howe | Dave Rucker | | 411 | 419 | -8 |
| 1983-07-24 | vs LAN | 95 | W 3-0 | 47-48 | 3 | 35,928 | Neil Allen | Jerry Reuss | Neil Allen | Jerry Reuss | | 414 | 419 | -5 |
| 1983-07-25 | vs SFN | 96 | W 9-4 | 48-48 | 3 | 25,158 | Dave LaPoint | Andy McGaffigan | Dave LaPoint | Andy McGaffigan | | 423 | 423 | 0 |
| 1983-07-26 | vs SFN | 97 | W 6-5 | 49-48 | 3 | 27,226 | Joaquin Andujar | Fred Breining | Dave Rucker | Greg Minton | | 429 | 428 | 1 |
| 1983-07-27 | vs SFN | 98 | W 7-6 | 50-48 | 3 | 31,616 | John Martin | Renie Martin | Dave Von Ohlen | Jim Barr | Bruce Sutter | 436 | 434 | 2 |
| 1983-07-28 | @ MON | 99 | W 3-2 | 52-48 | 2 | 0 | John Stuper | Steve Rogers | Bruce Sutter | Woodie Fryman | | 439 | 436 | 3 |
| 1983-07-28 | @ MON | 100 | W 10-1 | 52-48 | 2 | 50,834 | Bob Forsch | Dan Schatzeder | Bob Forsch | Dan Schatzeder | | 449 | 437 | 12 |
| 1983-07-29 | @ MON | 101 | L 2-7 | 52-49 | 3 | 34,254 | Neil Allen | Bryn Smith | Bryn Smith | Neil Allen | | 451 | 444 | 7 |
| 1983-07-30 | @ MON | 102 | W 3-2 | 53-49 | 2 | 40,797 | Dave LaPoint | Charlie Lea | Dave LaPoint | Charlie Lea | Bruce Sutter | 454 | 446 | 8 |
| 1983-07-31 | @ MON | 103 | L 5-6 | 53-50 | 3 | 44,106 | Joaquin Andujar | Bill Gullickson | Jeff Reardon | John Stuper | | 459 | 452 | 7 |
| 1983-08-02 | vs CHN | 104 | L 3-5 | 53-51 | 3 | 35,513 | Neil Allen | Dickie Noles | Dickie Noles | Neil Allen | Lee Smith | 462 | 457 | 5 |
| 1983-08-03 | vs CHN | 105 | L 0-4 | 53-52 | 3 | 33,118 | Bob Forsch | Chuck Rainey | Chuck Rainey | Bob Forsch | Bill Campbell | 462 | 461 | 1 |
| 1983-08-04 | vs CHN | 106 | L 6-9 | 53-53 | 4 | 30,187 | Dave LaPoint | Steve Trout | Steve Trout | Dave LaPoint | Lee Smith | 468 | 470 | -2 |
| 1983-08-05 | vs PHI | 107 | L 7-10 | 53-54 | 4 | 32,903 | John Stuper | John Denny | John Denny | John Stuper | Ron Reed | 475 | 480 | -5 |
| 1983-08-06 | vs PHI | 108 | L 0-1 | 53-55 | 4 | 42,469 | Danny Cox | Steve Carlton | Al Holland | Bruce Sutter | | 475 | 481 | -6 |
| 1983-08-07 | vs PHI | 109 | L 2-5 | 53-56 | 4 | 46,373 | Neil Allen | Marty Bystrom | Marty Bystrom | Neil Allen | Ron Reed | 477 | 486 | -9 |
| 1983-08-09 | @ CHN | 110 | L 3-5 | 53-57 | 4 | 31,125 | Bob Forsch | Chuck Rainey | Chuck Rainey | Bob Forsch | Lee Smith | 480 | 491 | -11 |
| 1983-08-10 | @ CHN | 111 | W 9-5 | 54-57 | 4 | 30,301 | Dave LaPoint | Steve Trout | Dave Rucker | Dickie Noles | John Stuper | 489 | 496 | -7 |
| 1983-08-11 | @ CHN | 112 | L 5-10 | 54-58 | 4 | 23,480 | Danny Cox | Dick Ruthven | Dick Ruthven | Danny Cox | | 494 | 506 | -12 |
| 1983-08-12 | @ PHI | 113 | L 2-5 | 54-59 | 4 | 33,521 | Neil Allen | Marty Bystrom | Marty Bystrom | Neil Allen | Guillermo Hernandez | 496 | 511 | -15 |
| 1983-08-13 | @ PHI | 114 | W 6-2 | 55-59 | 4 | 40,541 | Joaquin Andujar | Charles Hudson | Dave LaPoint | Charles Hudson | | 502 | 513 | -11 |
| 1983-08-14 | @ PHI | 115 | L 1-5 | 55-60 | 4 | 42,787 | Bob Forsch | John Denny | John Denny | Bob Forsch | | 503 | 518 | -15 |
| 1983-08-15 | vs MON | 116 | L 1-5 | 55-61 | 4 | 29,376 | John Stuper | Charlie Lea | Charlie Lea | Bruce Sutter | Jeff Reardon | 504 | 523 | -19 |
| 1983-08-16 | vs MON | 117 | W 4-3 | 56-61 | 4 | 27,320 | Danny Cox | Bill Gullickson | Neil Allen | Jeff Reardon | | 508 | 526 | -18 |
| 1983-08-18 | vs HOU | 118 | W 5-4 | 57-61 | 4 | 27,053 | Joaquin Andujar | Joe Niekro | Dave Rucker | Bill Dawley | | 513 | 530 | -17 |
| 1983-08-19 | vs HOU | 119 | W 2-0 | 58-61 | 4 | 28,200 | Dave LaPoint | Mike Madden | Dave LaPoint | Mike Madden | Bruce Sutter | 515 | 530 | -15 |
| 1983-08-20 | vs HOU | 120 | W 3-0 | 59-61 | 4 | 41,539 | John Stuper | Bob Knepper | John Stuper | Bob Knepper | | 518 | 530 | -12 |
| 1983-08-21 | vs HOU | 121 | W 5-2 | 60-61 | 4 | 31,962 | Danny Cox | Nolan Ryan | Danny Cox | Nolan Ryan | Bruce Sutter | 523 | 532 | -9 |
| 1983-08-23 | vs ATL | 122 | W 7-0 | 61-61 | 3 | 32,100 | Joaquin Andujar | Pete Falcone | Joaquin Andujar | Pete Falcone | | 530 | 532 | -2 |
| 1983-08-24 | vs ATL | 123 | L 3-11 | 61-62 | 3 | 31,049 | Dave LaPoint | Phil Niekro | Phil Niekro | Dave LaPoint | | 533 | 543 | -10 |
| 1983-08-25 | vs ATL | 124 | W 2-1 | 62-62 | 3 | 27,637 | John Stuper | Craig McMurtry | Neil Allen | Steve Bedrosian | | 535 | 544 | -9 |
| 1983-08-26 | @ CIN | 125 | L 3-7 | 62-63 | 3 | 16,576 | Danny Cox | Charlie Puleo | Charlie Puleo | Danny Cox | Bill Scherrer | 538 | 551 | -13 |
| 1983-08-27 | @ CIN | 126 | W 3-1 | 63-63 | 3 | 17,970 | Joaquin Andujar | Bruce Berenyi | Dave Rucker | Ted Power | Bruce Sutter | 541 | 552 | -11 |
| 1983-08-28 | @ CIN | 127 | L 4-5 | 63-64 | 4 | 17,549 | Dave LaPoint | Frank Pastore | Ben Hayes | Bruce Sutter | | 545 | 557 | -12 |
| 1983-08-29 | @ HOU | 128 | W 6-1 | 64-64 | 4 | 9,848 | John Stuper | Mike Madden | John Stuper | Mike Madden | | 551 | 558 | -7 |
| 1983-08-30 | @ HOU | 129 | L 1-3 | 64-65 | 4 | 11,041 | Danny Cox | Vern Ruhle | Vern Ruhle | Danny Cox | Bill Dawley | 552 | 561 | -9 |
| 1983-08-31 | @ ATL | 130 | W 6-3 | 65-65 | 4 | 21,954 | Joaquin Andujar | Len Barker | Joaquin Andujar | Len Barker | Bruce Sutter | 558 | 564 | -6 |
| 1983-09-01 | @ ATL | 131 | W 8-3 | 66-65 | 4 | 15,062 | Neil Allen | Pascual Perez | Bob Forsch | Pascual Perez | | 566 | 567 | -1 |
| 1983-09-02 | vs CIN | 132 | L 0-4 | 66-66 | 4 | 22,760 | John Stuper | Frank Pastore | Frank Pastore | John Stuper | | 566 | 571 | -5 |
| 1983-09-03 | vs CIN | 133 | L 2-3 | 66-67 | 4 | 34,798 | Danny Cox | Mario Soto | Mario Soto | Dave Rucker | | 568 | 574 | -6 |
| 1983-09-04 | vs CIN | 134 | W 5-4 | 67-67 | 4 | 35,255 | Joaquin Andujar | Joe Price | Jeff Lahti | Ben Hayes | | 573 | 578 | -5 |
| 1983-09-05 | vs PIT | 135 | W 7-4 | 69-67 | 4 | 0 | Neil Allen | Larry McWilliams | Dave LaPoint | Rod Scurry | | 580 | 582 | -2 |
| 1983-09-05 | vs PIT | 136 | W 7-6 | 69-67 | 4 | 39,687 | Bob Forsch | Alfonso Pulido | Neil Allen | Cecilio Guante | | 587 | 588 | -1 |
| 1983-09-06 | vs PIT | 137 | L 0-5 | 69-68 | 4 | 23,604 | John Stuper | Lee Tunnell | Lee Tunnell | John Stuper | | 587 | 593 | -6 |
| 1983-09-07 | vs PIT | 138 | W 5-2 | 70-68 | 4 | 25,981 | Danny Cox | Rick Rhoden | Danny Cox | Rick Rhoden | Bruce Sutter | 592 | 595 | -3 |
| 1983-09-09 | @ CHN | 139 | W 6-5 | 71-68 | 3 | 10,195 | Joaquin Andujar | Fergie Jenkins | Bruce Sutter | Lee Smith | | 598 | 600 | -2 |
| 1983-09-10 | @ CHN | 140 | L 5-8 | 71-69 | 4 | 26,388 | Bob Forsch | Chuck Rainey | Bill Campbell | Jeff Lahti | Lee Smith | 603 | 608 | -5 |
| 1983-09-11 | @ CHN | 141 | W 2-1 | 72-69 | 3 | 34,634 | John Stuper | Rick Reuschel | John Stuper | Lee Smith | Bruce Sutter | 605 | 609 | -4 |
| 1983-09-12 | @ PIT | 142 | L 5-7 | 72-70 | 4 | 10,458 | Danny Cox | Lee Tunnell | Lee Tunnell | Danny Cox | Manny Sarmiento | 610 | 616 | -6 |
| 1983-09-13 | @ PIT | 143 | L 0-6 | 72-71 | 4 | 9,771 | Joaquin Andujar | Rick Rhoden | Rick Rhoden | Joaquin Andujar | | 610 | 622 | -12 |
| 1983-09-14 | @ NYN | 144 | W 2-1 | 73-71 | 4 | 5,748 | Neil Allen | Tom Seaver | Neil Allen | Tom Seaver | Bruce Sutter | 612 | 623 | -11 |
| 1983-09-15 | @ NYN | 145 | L 4-6 | 73-72 | 4 | 5,887 | Bob Forsch | Ed Lynch | Ed Lynch | Dave LaPoint | Jesse Orosco | 616 | 629 | -13 |
| 1983-09-16 | @ PHI | 146 | L 2-3 | 73-73 | 4 | 30,069 | John Stuper | Charles Hudson | Guillermo Hernandez | Steve Baker | | 618 | 632 | -14 |
| 1983-09-17 | @ PHI | 147 | L 1-4 | 73-74 | 4 | 23,467 | Danny Cox | John Denny | John Denny | Danny Cox | Al Holland | 619 | 636 | -17 |
| 1983-09-18 | @ PHI | 148 | L 3-5 | 73-75 | 4 | 30,915 | Joaquin Andujar | Steve Carlton | Steve Carlton | Joaquin Andujar | Al Holland | 622 | 641 | -19 |
| 1983-09-19 | @ MON | 149 | L 0-3 | 73-77 | 4 | 0 | Neil Allen | Bryn Smith | Bryn Smith | Neil Allen | | 622 | 644 | -22 |
| 1983-09-19 | @ MON | 150 | L 3-6 | 73-77 | 4 | 40,229 | Dave LaPoint | Ray Burris | Jeff Reardon | Dave Rucker | Bob James | 625 | 650 | -25 |
| 1983-09-20 | @ MON | 151 | L 1-10 | 73-78 | 4 | 33,669 | Bob Forsch | Bill Gullickson | Bill Gullickson | Bob Forsch | | 626 | 660 | -34 |
| 1983-09-21 | vs NYN | 152 | W 9-3 | 74-78 | 4 | 11,741 | John Stuper | Mike Torrez | John Stuper | Mike Torrez | | 635 | 663 | -28 |
| 1983-09-22 | vs NYN | 153 | W 3-2 | 75-78 | 4 | 11,882 | Danny Cox | Ron Darling | Danny Cox | Ron Darling | Bruce Sutter | 638 | 665 | -27 |
| 1983-09-23 | vs PHI | 154 | L 2-6 | 75-79 | 4 | 27,266 | Joaquin Andujar | Steve Carlton | Steve Carlton | Joaquin Andujar | | 640 | 671 | -31 |
| 1983-09-24 | vs PHI | 155 | L 6-9 | 75-80 | 4 | 27,441 | Dave LaPoint | Marty Bystrom | Ron Reed | Bruce Sutter | | 646 | 680 | -34 |
| 1983-09-25 | vs PHI | 156 | L 5-6 | 75-81 | 4 | 20,029 | Neil Allen | Kevin Gross | Larry Andersen | Jeff Lahti | Al Holland | 651 | 686 | -35 |
| 1983-09-26 | vs MON | 157 | W 3-0 | 76-81 | 4 | 12,457 | Bob Forsch | Steve Rogers | Bob Forsch | Steve Rogers | | 654 | 686 | -32 |
| 1983-09-27 | vs MON | 158 | L 4-10 | 76-82 | 4 | 13,949 | John Stuper | Charlie Lea | Charlie Lea | John Stuper | Bob James | 658 | 696 | -38 |
| 1983-09-28 | vs MON | 159 | L 0-4 | 76-83 | 4 | 13,944 | Danny Cox | Bryn Smith | Bryn Smith | Danny Cox | | 658 | 700 | -42 |
| 1983-09-30 | vs CHN | 160 | W 9-2 | 77-83 | 4 | 19,924 | Neil Allen | Reggie Patterson | Neil Allen | Reggie Patterson | | 667 | 702 | -35 |
| 1983-10-01 | vs CHN | 161 | W 3-2 | 78-83 | 4 | 23,543 | Bob Forsch | Don Schulze | Bob Forsch | Craig Lefferts | Bruce Sutter | 670 | 704 | -34 |
| 1983-10-02 | vs CHN | 162 | W 9-6 | 79-83 | 4 | 38,763 | John Stuper | Chuck Rainey | John Stuper | Chuck Rainey | Dave Von Ohlen | 679 | 710 | -31 |