| 1983-04-04 | @ CIN | 1 | L 4-5 | 0-1 | 2 | 42,892 | Phil Niekro | Mario Soto | Mario Soto | Steve Bedrosian | Tom Hume | 4 | 5 | -1 |
| 1983-04-06 | @ CIN | 2 | W 5-1 | 1-1 | 3 | 10,102 | Pascual Perez | Bruce Berenyi | Pascual Perez | Bruce Berenyi | | 9 | 6 | 3 |
| 1983-04-08 | vs SDN | 3 | W 4-2 | 2-1 | 1 | 32,737 | Rick Camp | Eric Show | Steve Bedrosian | Floyd Chiffer | Gene Garber | 13 | 8 | 5 |
| 1983-04-09 | vs SDN | 4 | W 6-5 | 3-1 | 1 | 12,665 | Phil Niekro | John Montefusco | Pete Falcone | Chris Welsh | | 19 | 13 | 6 |
| 1983-04-10 | vs SDN | 5 | W 4-3 | 4-1 | 1 | 21,144 | Craig McMurtry | Ed Whitson | Craig McMurtry | Ed Whitson | Steve Bedrosian | 23 | 16 | 7 |
| 1983-04-11 | vs SDN | 6 | W 4-0 | 5-1 | 1 | 6,915 | Pascual Perez | Tim Lollar | Pascual Perez | Tim Lollar | | 27 | 16 | 11 |
| 1983-04-12 | vs CIN | 7 | W 4-1 | 6-1 | 1 | 10,356 | Rick Behenna | Mario Soto | Rick Behenna | Mario Soto | Terry Forster | 31 | 17 | 14 |
| 1983-04-13 | vs CIN | 8 | W 6-1 | 7-1 | 1 | 12,362 | Rick Camp | Frank Pastore | Rick Camp | Frank Pastore | | 37 | 18 | 19 |
| 1983-04-16 | @ PHI | 9 | L 4-8 | 7-2 | 2 | 17,557 | Phil Niekro | Steve Carlton | Steve Carlton | Phil Niekro | | 41 | 26 | 15 |
| 1983-04-17 | @ PHI | 10 | W 3-1 | 8-2 | 1 | 27,522 | Pascual Perez | Larry Christenson | Pascual Perez | Ed Farmer | Gene Garber | 44 | 27 | 17 |
| 1983-04-18 | @ SDN | 11 | L 3-10 | 8-3 | 2 | 18,730 | Craig McMurtry | Eric Show | Eric Show | Craig McMurtry | Luis DeLeon | 47 | 37 | 10 |
| 1983-04-19 | @ SDN | 12 | W 9-2 | 9-3 | 1 | 21,327 | Rick Camp | John Montefusco | Rick Camp | John Montefusco | | 56 | 39 | 17 |
| 1983-04-22 | vs NYN | 13 | W 5-4 | 10-3 | 1 | 12,138 | Phil Niekro | Scott Holman | Gene Garber | Neil Allen | | 61 | 43 | 18 |
| 1983-04-24 | vs NYN | 14 | W 6-3 | 12-3 | 1 | 0 | Rick Camp | Craig Swan | Rick Camp | Craig Swan | Gene Garber | 67 | 46 | 21 |
| 1983-04-24 | vs NYN | 15 | W 5-3 | 12-3 | 1 | 18,568 | Craig McMurtry | Rick Ownbey | Steve Bedrosian | Doug Sisk | | 72 | 49 | 23 |
| 1983-04-26 | vs PHI | 16 | W 10-4 | 13-3 | 1 | 22,511 | Pascual Perez | Larry Christenson | Pascual Perez | Larry Christenson | Terry Forster | 82 | 53 | 29 |
| 1983-04-27 | vs PHI | 17 | L 2-6 | 13-4 | 1 | 20,341 | Phil Niekro | Dick Ruthven | Dick Ruthven | Phil Niekro | | 84 | 59 | 25 |
| 1983-04-29 | @ NYN | 18 | L 5-6 | 13-5 | 2 | 12,348 | Rick Camp | Craig Swan | Ed Lynch | Rick Camp | Doug Sisk | 89 | 65 | 24 |
| 1983-04-30 | @ NYN | 19 | W 6-1 | 14-5 | 1 | 9,811 | Craig McMurtry | Rick Ownbey | Craig McMurtry | Rick Ownbey | | 95 | 66 | 29 |
| 1983-05-01 | @ NYN | 20 | W 2-1 | 15-5 | 1 | 32,163 | Phil Niekro | Tom Seaver | Phil Niekro | Tom Seaver | Steve Bedrosian | 97 | 67 | 30 |
| 1983-05-03 | @ MON | 21 | W 5-2 | 16-5 | 1 | 10,625 | Rick Behenna | Scott Sanderson | Rick Behenna | Rick Grapenthin | Terry Forster | 102 | 69 | 33 |
| 1983-05-04 | @ MON | 22 | L 1-4 | 16-6 | 1 | 10,193 | Rick Camp | Steve Rogers | Steve Rogers | Rick Camp | | 103 | 73 | 30 |
| 1983-05-05 | vs HOU | 23 | W 6-3 | 17-6 | 1 | 14,817 | Craig McMurtry | Bob Knepper | Craig McMurtry | Bob Knepper | Steve Bedrosian | 109 | 76 | 33 |
| 1983-05-06 | vs HOU | 24 | L 0-6 | 17-7 | 2 | 29,956 | Phil Niekro | Mike Scott | Frank DiPino | Phil Niekro | | 109 | 82 | 27 |
| 1983-05-07 | vs HOU | 25 | W 10-1 | 18-7 | 2 | 33,612 | Pascual Perez | Joe Niekro | Pascual Perez | Joe Niekro | | 119 | 83 | 36 |
| 1983-05-08 | vs HOU | 26 | W 4-3 | 19-7 | 2 | 20,799 | Rick Behenna | Mike LaCoss | Rick Behenna | Mike LaCoss | Terry Forster | 123 | 86 | 37 |
| 1983-05-09 | vs MON | 27 | L 3-5 | 19-8 | 2 | 16,231 | Rick Camp | Steve Rogers | Steve Rogers | Rick Camp | | 126 | 91 | 35 |
| 1983-05-10 | vs MON | 28 | W 4-2 | 20-8 | 2 | 16,977 | Craig McMurtry | Scott Sanderson | Craig McMurtry | Scott Sanderson | Steve Bedrosian | 130 | 93 | 37 |
| 1983-05-11 | vs MON | 29 | L 5-8 | 20-9 | 2 | 16,866 | Phil Niekro | Charlie Lea | Dan Schatzeder | Steve Bedrosian | | 135 | 101 | 34 |
| 1983-05-12 | @ HOU | 30 | L 3-4 | 20-10 | 2 | 9,842 | Pascual Perez | Joe Niekro | Frank DiPino | Pete Falcone | | 138 | 105 | 33 |
| 1983-05-13 | @ HOU | 31 | L 2-5 | 20-11 | 2 | 17,757 | Rick Behenna | Mike LaCoss | Mike LaCoss | Rick Behenna | | 140 | 110 | 30 |
| 1983-05-14 | @ HOU | 32 | W 4-3 | 21-11 | 2 | 38,102 | Rick Camp | Vern Ruhle | Terry Forster | Bill Dawley | | 144 | 113 | 31 |
| 1983-05-15 | @ HOU | 33 | W 9-4 | 22-11 | 2 | 14,857 | Craig McMurtry | Bob Knepper | Craig McMurtry | Bob Knepper | | 153 | 117 | 36 |
| 1983-05-17 | @ CHN | 34 | L 3-4 | 22-12 | 2 | 9,041 | Pascual Perez | Chuck Rainey | Chuck Rainey | Pascual Perez | Mike Proly | 156 | 121 | 35 |
| 1983-05-18 | @ CHN | 35 | L 3-5 | 22-13 | 2 | 8,403 | Rick Behenna | Steve Trout | Steve Trout | Rick Behenna | Bill Campbell | 159 | 126 | 33 |
| 1983-05-20 | @ SLN | 36 | W 2-1 | 23-13 | 2 | 42,759 | Craig McMurtry | Dave LaPoint | Craig McMurtry | Dave LaPoint | Terry Forster | 161 | 127 | 34 |
| 1983-05-21 | @ SLN | 37 | W 4-1 | 24-13 | 2 | 42,854 | Phil Niekro | John Stuper | Steve Bedrosian | John Stuper | | 165 | 128 | 37 |
| 1983-05-22 | @ SLN | 38 | W 7-5 | 25-13 | 2 | 34,326 | Pascual Perez | Bob Forsch | Steve Bedrosian | Bruce Sutter | | 172 | 133 | 39 |
| 1983-05-23 | vs PIT | 39 | W 6-3 | 26-13 | 2 | 16,743 | Pete Falcone | Rick Rhoden | Pete Falcone | Rick Rhoden | Donnie Moore | 178 | 136 | 42 |
| 1983-05-24 | vs PIT | 40 | L 5-6 | 26-14 | 2 | 17,447 | Rick Camp | Larry McWilliams | Larry McWilliams | Rick Camp | | 183 | 142 | 41 |
| 1983-05-25 | vs PIT | 41 | W 6-0 | 27-14 | 2 | 15,034 | Craig McMurtry | Jim Bibby | Craig McMurtry | Jim Bibby | | 189 | 142 | 47 |
| 1983-05-26 | vs CHN | 42 | L 1-5 | 27-15 | 2 | 13,444 | Phil Niekro | Paul Moskau | Paul Moskau | Phil Niekro | | 190 | 147 | 43 |
| 1983-05-27 | vs CHN | 43 | L 6-8 | 27-16 | 2 | 25,838 | Pascual Perez | Chuck Rainey | Warren Brusstar | Rick Behenna | Lee Smith | 196 | 155 | 41 |
| 1983-05-28 | vs CHN | 44 | W 6-4 | 28-16 | 2 | 40,041 | Pete Falcone | Steve Trout | Donnie Moore | Mike Proly | Steve Bedrosian | 202 | 159 | 43 |
| 1983-05-29 | vs CHN | 45 | W 6-2 | 29-16 | 2 | 29,025 | Rick Camp | Dick Ruthven | Rick Camp | Dick Ruthven | Terry Forster | 208 | 161 | 47 |
| 1983-05-30 | @ PIT | 46 | L 6-8 | 29-17 | 2 | 12,211 | Craig McMurtry | Jim Bibby | Jim Bibby | Craig McMurtry | Kent Tekulve | 214 | 169 | 45 |
| 1983-05-31 | @ PIT | 47 | W 10-2 | 30-17 | 2 | 5,262 | Phil Niekro | Lee Tunnell | Phil Niekro | Lee Tunnell | Steve Bedrosian | 224 | 171 | 53 |
| 1983-06-01 | @ PIT | 48 | W 6-3 | 31-17 | 2 | 6,255 | Pascual Perez | John Candelaria | Pascual Perez | John Candelaria | Gene Garber | 230 | 174 | 56 |
| 1983-06-02 | vs SLN | 49 | W 8-1 | 32-17 | 2 | 18,756 | Pete Falcone | Bob Forsch | Pete Falcone | Bob Forsch | Terry Forster | 238 | 175 | 63 |
| 1983-06-03 | vs SLN | 50 | W 5-3 | 33-17 | 2 | 34,071 | Rick Camp | Dave LaPoint | Rick Camp | Dave LaPoint | Steve Bedrosian | 243 | 178 | 65 |
| 1983-06-04 | vs SLN | 51 | W 6-4 | 34-17 | 2 | 41,773 | Craig McMurtry | Joaquin Andujar | Donnie Moore | Joaquin Andujar | Terry Forster | 249 | 182 | 67 |
| 1983-06-05 | vs SLN | 52 | L 3-8 | 34-18 | 2 | 28,787 | Phil Niekro | John Stuper | John Stuper | Phil Niekro | Doug Bair | 252 | 190 | 62 |
| 1983-06-07 | vs LAN | 53 | W 4-1 | 35-18 | 2 | 38,193 | Pascual Perez | Bob Welch | Pascual Perez | Bob Welch | Steve Bedrosian | 256 | 191 | 65 |
| 1983-06-08 | vs LAN | 54 | L 5-11 | 35-19 | 2 | 47,142 | Rick Camp | Fernando Valenzuela | Fernando Valenzuela | Rick Camp | | 261 | 202 | 59 |
| 1983-06-09 | vs LAN | 55 | L 2-4 | 35-20 | 2 | 47,501 | Craig McMurtry | Burt Hooton | Dave Stewart | Terry Forster | | 263 | 206 | 57 |
| 1983-06-10 | vs SFN | 56 | L 4-6 | 36-21 | 2 | 0 | Phil Niekro | Fred Breining | Gary Lavelle | Rick Camp | Greg Minton | 267 | 212 | 55 |
| 1983-06-10 | vs SFN | 57 | W 7-3 | 36-21 | 2 | 38,550 | Pete Falcone | Bill Laskey | Pete Falcone | Bill Laskey | Donnie Moore | 274 | 215 | 59 |
| 1983-06-11 | vs SFN | 58 | L 6-7 | 36-22 | 2 | 48,381 | Rick Behenna | Atlee Hammaker | Atlee Hammaker | Gene Garber | Gary Lavelle | 280 | 222 | 58 |
| 1983-06-12 | vs SFN | 59 | W 3-2 | 37-22 | 2 | 24,676 | Pascual Perez | Andy McGaffigan | Pascual Perez | Andy McGaffigan | Gene Garber | 283 | 224 | 59 |
| 1983-06-14 | @ LAN | 60 | L 3-4 | 37-23 | 2 | 47,639 | Craig McMurtry | Burt Hooton | Burt Hooton | Craig McMurtry | Dave Stewart | 286 | 228 | 58 |
| 1983-06-15 | @ LAN | 61 | W 3-2 | 38-23 | 2 | 46,213 | Pete Falcone | Jerry Reuss | Gene Garber | Dave Stewart | Steve Bedrosian | 289 | 230 | 59 |
| 1983-06-16 | @ LAN | 62 | L 1-6 | 38-24 | 2 | 49,946 | Rick Camp | Alejandro Pena | Alejandro Pena | Rick Camp | | 290 | 236 | 54 |
| 1983-06-17 | @ SFN | 63 | L 1-2 | 38-25 | 2 | 16,871 | Pascual Perez | Atlee Hammaker | Atlee Hammaker | Pascual Perez | Greg Minton | 291 | 238 | 53 |
| 1983-06-18 | @ SFN | 64 | L 4-5 | 38-26 | 2 | 20,055 | Ken Dayley | Andy McGaffigan | Gary Lavelle | Gene Garber | | 295 | 243 | 52 |
| 1983-06-19 | @ SFN | 65 | L 6-9 | 38-27 | 2 | 48,811 | Craig McMurtry | Mike Krukow | Mike Krukow | Craig McMurtry | Gary Lavelle | 301 | 252 | 49 |
| 1983-06-20 | @ HOU | 66 | W 7-1 | 39-27 | 2 | 16,242 | Pete Falcone | Vern Ruhle | Pete Falcone | Vern Ruhle | | 308 | 253 | 55 |
| 1983-06-21 | @ HOU | 67 | L 0-5 | 39-28 | 2 | 16,251 | Phil Niekro | Mike Scott | Mike Scott | Phil Niekro | | 308 | 258 | 50 |
| 1983-06-22 | @ HOU | 68 | L 3-4 | 39-29 | 2 | 25,322 | Pascual Perez | Nolan Ryan | Bill Dawley | Gene Garber | | 311 | 262 | 49 |
| 1983-06-24 | @ CIN | 69 | W 3-0 | 41-29 | 2 | 0 | Craig McMurtry | Joe Price | Craig McMurtry | Joe Price | | 314 | 262 | 52 |
| 1983-06-24 | @ CIN | 70 | W 10-5 | 41-29 | 2 | 23,667 | Ken Dayley | Bruce Berenyi | Ken Dayley | Bruce Berenyi | | 324 | 267 | 57 |
| 1983-06-25 | @ CIN | 71 | W 8-2 | 42-29 | 2 | 20,983 | Pete Falcone | Charlie Puleo | Pete Falcone | Charlie Puleo | | 332 | 269 | 63 |
| 1983-06-26 | @ CIN | 72 | W 5-1 | 43-29 | 2 | 15,769 | Phil Niekro | Frank Pastore | Phil Niekro | Frank Pastore | | 337 | 270 | 67 |
| 1983-06-27 | @ CIN | 73 | W 2-1 | 44-29 | 2 | 12,745 | Pascual Perez | Mario Soto | Pascual Perez | Mario Soto | | 339 | 271 | 68 |
| 1983-06-28 | vs HOU | 74 | L 3-4 | 44-30 | 2 | 20,960 | Craig McMurtry | Nolan Ryan | Nolan Ryan | Terry Forster | Bill Dawley | 342 | 275 | 67 |
| 1983-06-29 | vs HOU | 75 | W 11-1 | 45-30 | 2 | 16,776 | Ken Dayley | Joe Niekro | Ken Dayley | Joe Niekro | | 353 | 276 | 77 |
| 1983-06-30 | vs HOU | 76 | W 6-4 | 46-30 | 2 | 20,117 | Pete Falcone | Bob Knepper | Steve Bedrosian | Frank DiPino | | 359 | 280 | 79 |
| 1983-07-01 | vs CIN | 77 | W 5-2 | 47-30 | 2 | 26,600 | Phil Niekro | Frank Pastore | Phil Niekro | Frank Pastore | Steve Bedrosian | 364 | 282 | 82 |
| 1983-07-02 | vs CIN | 78 | W 4-2 | 48-30 | 2 | 48,492 | Pascual Perez | Mario Soto | Pascual Perez | Mario Soto | Donnie Moore | 368 | 284 | 84 |
| 1983-07-03 | vs CIN | 79 | L 1-2 | 48-31 | 2 | 32,275 | Craig McMurtry | Joe Price | Joe Price | Craig McMurtry | Ben Hayes | 369 | 286 | 83 |
| 1983-07-04 | vs CIN | 80 | W 9-5 | 49-31 | 1 | 48,470 | Ken Dayley | Bruce Berenyi | Pete Falcone | Bruce Berenyi | Donnie Moore | 378 | 291 | 87 |
| 1983-07-08 | @ MON | 81 | W 6-5 | 50-31 | 1 | 30,151 | Craig McMurtry | Charlie Lea | Craig McMurtry | Charlie Lea | Steve Bedrosian | 384 | 296 | 88 |
| 1983-07-09 | @ MON | 82 | W 8-5 | 51-31 | 1 | 31,846 | Pascual Perez | Steve Rogers | Terry Forster | Bryn Smith | Steve Bedrosian | 392 | 301 | 91 |
| 1983-07-10 | @ MON | 83 | L 6-7 | 51-32 | 1 | 47,191 | Phil Niekro | Bill Gullickson | Jeff Reardon | Donnie Moore | | 398 | 308 | 90 |
| 1983-07-11 | @ MON | 84 | W 6-4 | 52-32 | 1 | 27,338 | Pete Falcone | Ray Burris | Rick Camp | Woodie Fryman | Steve Bedrosian | 404 | 312 | 92 |
| 1983-07-12 | @ PHI | 85 | L 1-4 | 52-34 | 1 | 0 | Ken Dayley | John Denny | John Denny | Ken Dayley | Al Holland | 405 | 316 | 89 |
| 1983-07-12 | @ PHI | 86 | L 6-7 | 52-34 | 1 | 32,491 | Bob Walk | Kevin Gross | Guillermo Hernandez | Steve Bedrosian | | 411 | 323 | 88 |
| 1983-07-13 | @ PHI | 87 | W 5-2 | 53-34 | 1 | 27,762 | Craig McMurtry | Steve Carlton | Craig McMurtry | Steve Carlton | | 416 | 325 | 91 |
| 1983-07-14 | @ PHI | 88 | W 5-2 | 54-34 | 1 | 26,784 | Pascual Perez | Marty Bystrom | Steve Bedrosian | Guillermo Hernandez | Terry Forster | 421 | 327 | 94 |
| 1983-07-15 | vs MON | 89 | W 9-3 | 55-34 | 1 | 38,729 | Phil Niekro | Bill Gullickson | Phil Niekro | Bill Gullickson | Donnie Moore | 430 | 330 | 100 |
| 1983-07-16 | vs MON | 90 | W 6-3 | 56-34 | 1 | 48,139 | Pete Falcone | Ray Burris | Pete Falcone | Ray Burris | Steve Bedrosian | 436 | 333 | 103 |
| 1983-07-17 | vs MON | 91 | L 1-3 | 56-35 | 1 | 24,288 | Ken Dayley | Greg Bargar | Greg Bargar | Ken Dayley | Jeff Reardon | 437 | 336 | 101 |
| 1983-07-18 | vs NYN | 92 | W 7-4 | 57-35 | 1 | 19,463 | Craig McMurtry | Tom Gorman | Rick Camp | Tom Gorman | Steve Bedrosian | 444 | 340 | 104 |
| 1983-07-19 | vs NYN | 93 | W 11-7 | 58-35 | 1 | 17,599 | Pascual Perez | Tom Seaver | Tony Brizzolara | Jesse Orosco | | 455 | 347 | 108 |
| 1983-07-20 | vs NYN | 94 | L 2-3 | 58-36 | 1 | 22,188 | Phil Niekro | Ed Lynch | Ed Lynch | Donnie Moore | Doug Sisk | 457 | 350 | 107 |
| 1983-07-21 | vs PHI | 95 | L 6-10 | 58-37 | 1 | 29,316 | Pete Falcone | John Denny | John Denny | Rick Camp | | 463 | 360 | 103 |
| 1983-07-22 | vs PHI | 96 | W 6-1 | 59-37 | 1 | 40,481 | Craig McMurtry | Kevin Gross | Craig McMurtry | Kevin Gross | | 469 | 361 | 108 |
| 1983-07-23 | vs PHI | 97 | W 6-5 | 60-37 | 1 | 36,501 | Ken Dayley | Steve Carlton | Rick Camp | Guillermo Hernandez | | 475 | 366 | 109 |
| 1983-07-24 | vs PHI | 98 | W 12-4 | 61-37 | 1 | 29,406 | Pascual Perez | Marty Bystrom | Pascual Perez | Marty Bystrom | | 487 | 370 | 117 |
| 1983-07-25 | @ NYN | 99 | L 4-5 | 61-38 | 1 | 12,191 | Phil Niekro | Ed Lynch | Doug Sisk | Steve Bedrosian | | 491 | 375 | 116 |
| 1983-07-26 | @ NYN | 100 | L 1-2 | 61-39 | 1 | 13,380 | Rick Camp | Mike Torrez | Mike Torrez | Ken Dayley | | 492 | 377 | 115 |
| 1983-07-27 | @ NYN | 101 | W 6-3 | 62-39 | 1 | 12,455 | Craig McMurtry | Walt Terrell | Craig McMurtry | Doug Sisk | Terry Forster | 498 | 380 | 118 |
| 1983-07-29 | @ SDN | 102 | W 2-1 | 63-40 | 1 | 0 | Pascual Perez | Tim Lollar | Pascual Perez | Tim Lollar | Gene Garber | 500 | 381 | 119 |
| 1983-07-29 | @ SDN | 103 | L 5-6 | 63-40 | 1 | 33,132 | Ken Dayley | John Montefusco | Sid Monge | Donnie Moore | | 505 | 387 | 118 |
| 1983-07-30 | @ SDN | 104 | W 5-2 | 64-40 | 1 | 24,111 | Phil Niekro | Dave Dravecky | Phil Niekro | Dave Dravecky | | 510 | 389 | 121 |
| 1983-07-31 | @ SDN | 105 | L 2-5 | 64-41 | 1 | 13,865 | Craig McMurtry | Mark Thurmond | Mark Thurmond | Craig McMurtry | John Montefusco | 512 | 394 | 118 |
| 1983-08-01 | @ SFN | 106 | W 8-3 | 65-41 | 1 | 23,822 | Rick Camp | Andy McGaffigan | Rick Camp | Andy McGaffigan | | 520 | 397 | 123 |
| 1983-08-02 | @ SFN | 107 | L 3-7 | 65-42 | 1 | 8,276 | Pascual Perez | Mike Krukow | Mike Krukow | Pascual Perez | Greg Minton | 523 | 404 | 119 |
| 1983-08-03 | @ SFN | 108 | W 6-4 | 66-42 | 1 | 20,015 | Ken Dayley | Mark Davis | Steve Bedrosian | Jim Barr | | 529 | 408 | 121 |
| 1983-08-04 | @ SFN | 109 | W 8-1 | 67-42 | 1 | 10,004 | Phil Niekro | Fred Breining | Phil Niekro | Fred Breining | | 537 | 409 | 128 |
| 1983-08-05 | @ LAN | 110 | L 1-2 | 67-43 | 1 | 50,039 | Craig McMurtry | Fernando Valenzuela | Fernando Valenzuela | Craig McMurtry | | 538 | 411 | 127 |
| 1983-08-06 | @ LAN | 111 | L 2-4 | 67-44 | 1 | 48,677 | Rick Camp | Bob Welch | Bob Welch | Rick Camp | Steve Howe | 540 | 415 | 125 |
| 1983-08-07 | @ LAN | 112 | W 5-2 | 68-44 | 1 | 46,594 | Pascual Perez | Alejandro Pena | Pascual Perez | Alejandro Pena | Steve Bedrosian | 545 | 417 | 128 |
| 1983-08-09 | vs SFN | 113 | W 7-2 | 69-44 | 1 | 32,416 | Phil Niekro | Mark Davis | Phil Niekro | Mark Calvert | | 552 | 419 | 133 |
| 1983-08-10 | vs SFN | 114 | L 4-7 | 69-45 | 1 | 29,103 | Craig McMurtry | Fred Breining | Greg Minton | Steve Bedrosian | Gary Lavelle | 556 | 426 | 130 |
| 1983-08-11 | vs SFN | 115 | W 6-4 | 70-45 | 1 | 31,214 | Ken Dayley | Bill Laskey | Ken Dayley | Bill Laskey | Gene Garber | 562 | 430 | 132 |
| 1983-08-12 | vs LAN | 116 | L 3-5 | 70-46 | 1 | 47,718 | Pascual Perez | Bob Welch | Bob Welch | Pascual Perez | Steve Howe | 565 | 435 | 130 |
| 1983-08-13 | vs LAN | 117 | W 8-7 | 71-46 | 1 | 48,566 | Pete Falcone | Alejandro Pena | Steve Bedrosian | Steve Howe | | 573 | 442 | 131 |
| 1983-08-14 | vs LAN | 118 | L 4-5 | 71-47 | 1 | 47,684 | Phil Niekro | Fernando Valenzuela | Fernando Valenzuela | Phil Niekro | Tom Niedenfuer | 577 | 447 | 130 |
| 1983-08-15 | vs SDN | 119 | L 0-4 | 71-48 | 1 | 35,893 | Craig McMurtry | Dave Dravecky | Dave Dravecky | Craig McMurtry | | 577 | 451 | 126 |
| 1983-08-16 | vs SDN | 120 | L 2-3 | 71-49 | 1 | 21,936 | Pascual Perez | Mark Thurmond | Sid Monge | Steve Bedrosian | Ed Whitson | 579 | 454 | 125 |
| 1983-08-18 | @ CHN | 121 | L 0-3 | 71-50 | 1 | 19,535 | Pete Falcone | Fergie Jenkins | Fergie Jenkins | Pete Falcone | Lee Smith | 579 | 457 | 122 |
| 1983-08-19 | @ CHN | 122 | W 5-3 | 72-50 | 1 | 16,701 | Phil Niekro | Chuck Rainey | Phil Niekro | Chuck Rainey | Steve Bedrosian | 584 | 460 | 124 |
| 1983-08-20 | @ CHN | 123 | W 9-2 | 73-50 | 1 | 36,043 | Craig McMurtry | Steve Trout | Ken Dayley | Steve Trout | Terry Forster | 593 | 462 | 131 |
| 1983-08-21 | @ CHN | 124 | W 11-9 | 74-50 | 1 | 31,669 | Pascual Perez | Dick Ruthven | Rick Camp | Dick Ruthven | Steve Bedrosian | 604 | 471 | 133 |
| 1983-08-23 | @ SLN | 125 | L 0-7 | 74-51 | 1 | 32,100 | Pete Falcone | Joaquin Andujar | Joaquin Andujar | Pete Falcone | | 604 | 478 | 126 |
| 1983-08-24 | @ SLN | 126 | W 11-3 | 75-51 | 1 | 31,049 | Phil Niekro | Dave LaPoint | Phil Niekro | Dave LaPoint | | 615 | 481 | 134 |
| 1983-08-25 | @ SLN | 127 | L 1-2 | 75-52 | 1 | 27,637 | Craig McMurtry | John Stuper | Neil Allen | Steve Bedrosian | | 616 | 483 | 133 |
| 1983-08-26 | @ PIT | 128 | L 1-9 | 75-53 | 1 | 23,772 | Pascual Perez | Larry McWilliams | Larry McWilliams | Pascual Perez | | 617 | 492 | 125 |
| 1983-08-27 | @ PIT | 129 | L 0-2 | 75-54 | 1 | 22,811 | Ken Dayley | Lee Tunnell | Lee Tunnell | Ken Dayley | | 617 | 494 | 123 |
| 1983-08-28 | @ PIT | 130 | W 2-1 | 76-54 | 1 | 26,193 | Pete Falcone | John Candelaria | Pete Falcone | John Candelaria | Terry Forster | 619 | 495 | 124 |
| 1983-08-29 | vs CHN | 131 | L 5-7 | 76-55 | 2 | 15,470 | Phil Niekro | Fergie Jenkins | Bill Campbell | Gene Garber | Lee Smith | 624 | 502 | 122 |
| 1983-08-30 | vs CHN | 132 | L 6-9 | 76-56 | 2 | 13,983 | Craig McMurtry | Chuck Rainey | Chuck Rainey | Craig McMurtry | Lee Smith | 630 | 511 | 119 |
| 1983-08-31 | vs SLN | 133 | L 3-6 | 76-57 | 2 | 21,954 | Len Barker | Joaquin Andujar | Joaquin Andujar | Len Barker | Bruce Sutter | 633 | 517 | 116 |
| 1983-09-01 | vs SLN | 134 | L 3-8 | 76-58 | 2 | 15,062 | Pascual Perez | Neil Allen | Bob Forsch | Pascual Perez | | 636 | 525 | 111 |
| 1983-09-02 | vs PIT | 135 | L 1-4 | 76-59 | 2 | 23,998 | Ken Dayley | John Candelaria | John Candelaria | Ken Dayley | Kent Tekulve | 637 | 529 | 108 |
| 1983-09-03 | vs PIT | 136 | L 2-6 | 76-60 | 2 | 31,233 | Phil Niekro | Rick Rhoden | Jim Bibby | Steve Bedrosian | Cecilio Guante | 639 | 535 | 104 |
| 1983-09-04 | vs PIT | 137 | W 6-5 | 77-60 | 2 | 24,610 | Craig McMurtry | Jose DeLeon | Terry Forster | Jim Bibby | Steve Bedrosian | 645 | 540 | 105 |
| 1983-09-05 | vs HOU | 138 | W 7-5 | 78-60 | 2 | 19,166 | Len Barker | Joe Niekro | Len Barker | Joe Niekro | Donnie Moore | 652 | 545 | 107 |
| 1983-09-07 | @ SFN | 139 | L 1-2 | 78-61 | 2 | 4,919 | Pascual Perez | Scott Garrelts | Scott Garrelts | Pascual Perez | Gary Lavelle | 653 | 547 | 106 |
| 1983-09-08 | @ SFN | 140 | W 12-9 | 79-61 | 2 | 3,720 | Ken Dayley | Mike Krukow | Gene Garber | Greg Minton | | 665 | 556 | 109 |
| 1983-09-09 | @ LAN | 141 | L 2-3 | 79-62 | 2 | 48,258 | Phil Niekro | Alejandro Pena | Alejandro Pena | Phil Niekro | Steve Howe | 667 | 559 | 108 |
| 1983-09-10 | @ LAN | 142 | W 6-3 | 80-62 | 2 | 51,418 | Craig McMurtry | Fernando Valenzuela | Steve Bedrosian | Joe Beckwith | Gene Garber | 673 | 562 | 111 |
| 1983-09-11 | @ LAN | 143 | L 6-7 | 80-63 | 2 | 45,269 | Len Barker | Rick Honeycutt | Joe Beckwith | Gene Garber | | 679 | 569 | 110 |
| 1983-09-13 | @ CIN | 144 | L 0-6 | 80-64 | 2 | 9,415 | Pascual Perez | Mario Soto | Mario Soto | Pascual Perez | | 679 | 575 | 104 |
| 1983-09-14 | @ CIN | 145 | L 4-6 | 80-65 | 2 | 9,222 | Phil Niekro | Frank Pastore | Frank Pastore | Phil Niekro | | 683 | 581 | 102 |
| 1983-09-16 | vs SDN | 146 | W 6-0 | 81-65 | 2 | 29,062 | Craig McMurtry | Tim Lollar | Craig McMurtry | Tim Lollar | | 689 | 581 | 108 |
| 1983-09-17 | vs SDN | 147 | L 1-2 | 81-66 | 2 | 35,031 | Len Barker | Andy Hawkins | Luis DeLeon | Len Barker | Gary Lucas | 690 | 583 | 107 |
| 1983-09-18 | vs SDN | 148 | L 2-4 | 81-67 | 2 | 25,476 | Pascual Perez | Mark Thurmond | Gary Lucas | Ken Dayley | | 692 | 587 | 105 |
| 1983-09-21 | vs CIN | 149 | W 9-1 | 82-68 | 2 | 0 | Craig McMurtry | Charlie Puleo | Craig McMurtry | Charlie Puleo | | 701 | 588 | 113 |
| 1983-09-21 | vs CIN | 150 | L 3-4 | 82-68 | 2 | 12,621 | Phil Niekro | Frank Pastore | Tom Hume | Steve Bedrosian | | 704 | 592 | 112 |
| 1983-09-22 | vs CIN | 151 | L 4-6 | 82-69 | 2 | 13,466 | Ken Dayley | Jeff Russell | Jeff Russell | Ken Dayley | Tom Hume | 708 | 598 | 110 |
| 1983-09-23 | vs LAN | 152 | L 2-11 | 82-70 | 2 | 44,403 | Len Barker | Jerry Reuss | Jerry Reuss | Len Barker | | 710 | 609 | 101 |
| 1983-09-24 | vs LAN | 153 | W 3-2 | 83-70 | 2 | 43,999 | Pascual Perez | Bob Welch | Pascual Perez | Tom Niedenfuer | | 713 | 611 | 102 |
| 1983-09-25 | vs LAN | 154 | W 7-1 | 84-70 | 2 | 43,931 | Craig McMurtry | Alejandro Pena | Craig McMurtry | Alejandro Pena | | 720 | 612 | 108 |
| 1983-09-26 | vs SFN | 155 | W 6-2 | 85-70 | 2 | 14,710 | Phil Niekro | Mark Calvert | Phil Niekro | Mark Calvert | Gene Garber | 726 | 614 | 112 |
| 1983-09-27 | vs SFN | 156 | L 2-6 | 85-71 | 2 | 29,838 | Len Barker | Mark Davis | Mark Davis | Steve Bedrosian | Greg Minton | 728 | 620 | 108 |
| 1983-09-28 | @ HOU | 157 | W 3-1 | 86-72 | 2 | 0 | Pascual Perez | Mike Scott | Pascual Perez | Mike Scott | | 731 | 621 | 110 |
| 1983-09-28 | @ HOU | 158 | L 1-5 | 86-72 | 2 | 15,356 | Ken Dayley | Joe Niekro | Joe Niekro | Ken Dayley | | 732 | 626 | 106 |
| 1983-09-29 | @ HOU | 159 | W 5-4 | 87-72 | 2 | 12,899 | Craig McMurtry | Nolan Ryan | Gene Garber | Vern Ruhle | Terry Forster | 737 | 630 | 107 |
| 1983-09-30 | @ SDN | 160 | L 2-3 | 87-73 | 2 | 9,736 | Phil Niekro | Eric Show | Eric Show | Phil Niekro | Gary Lucas | 739 | 633 | 106 |
| 1983-10-01 | @ SDN | 161 | L 3-4 | 87-74 | 2 | 9,153 | Steve Bedrosian | Dennis Rasmussen | Sid Monge | Pete Falcone | | 742 | 637 | 105 |
| 1983-10-02 | @ SDN | 162 | W 4-3 | 88-74 | 2 | 15,959 | Ken Dayley | Greg Booker | Ken Dayley | Greg Booker | Tony Brizzolara | 746 | 640 | 106 |