| 1983-04-05 | vs DET | 1 | L 3-11 | 0-1 | 6 | 30,961 | Brad Havens | Jack Morris | Jack Morris | Brad Havens | | 3 | 11 | -8 |
| 1983-04-06 | vs DET | 2 | L 5-9 | 0-2 | 7 | 4,835 | Jack O'Connor | Dan Petry | Dan Petry | Rick Lysander | | 8 | 20 | -12 |
| 1983-04-07 | vs DET | 3 | W 5-4 | 1-2 | 5 | 7,936 | Albert Williams | Jerry Ujdur | Albert Williams | Jerry Ujdur | Ron Davis | 13 | 24 | -11 |
| 1983-04-08 | @ SEA | 4 | W 5-4 | 2-2 | 3 | 6,662 | Frank Viola | Mike Moore | Rick Lysander | Bill Caudill | Len Whitehouse | 18 | 28 | -10 |
| 1983-04-09 | @ SEA | 5 | L 2-3 | 2-3 | 5 | 21,100 | Bryan Oelkers | Ed Nunez | Roy Thomas | Bryan Oelkers | Bill Caudill | 20 | 31 | -11 |
| 1983-04-10 | @ SEA | 6 | W 6-3 | 3-3 | 3 | 7,869 | Brad Havens | Gaylord Perry | Brad Havens | Gaylord Perry | Ron Davis | 26 | 34 | -8 |
| 1983-04-12 | @ OAK | 7 | L 3-4 | 3-4 | 6 | 7,129 | Jack O'Connor | Mike Norris | Dave Beard | Len Whitehouse | | 29 | 38 | -9 |
| 1983-04-13 | @ OAK | 8 | L 4-5 | 3-5 | 6 | 10,677 | Albert Williams | Tom Underwood | Steve Baker | Albert Williams | | 33 | 43 | -10 |
| 1983-04-15 | vs CAL | 9 | L 2-8 | 3-6 | 7 | 7,323 | Frank Viola | Ken Forsch | Ken Forsch | Frank Viola | | 35 | 51 | -16 |
| 1983-04-16 | vs CAL | 10 | L 5-9 | 3-7 | 7 | 9,974 | Bryan Oelkers | Bruce Kison | Bruce Kison | Bryan Oelkers | | 40 | 60 | -20 |
| 1983-04-17 | vs CAL | 11 | W 11-8 | 4-7 | 7 | 23,010 | Brad Havens | Tommy John | Len Whitehouse | Dave Goltz | Ron Davis | 51 | 68 | -17 |
| 1983-04-18 | vs SEA | 12 | W 8-5 | 5-7 | 6 | 2,416 | Jack O'Connor | Mike Moore | Jack O'Connor | Mike Moore | Pete Filson | 59 | 73 | -14 |
| 1983-04-19 | vs SEA | 13 | W 6-2 | 6-7 | 6 | 3,336 | Albert Williams | Ed Nunez | Len Whitehouse | Ed Nunez | | 65 | 75 | -10 |
| 1983-04-20 | vs SEA | 14 | W 11-2 | 7-7 | 6 | 3,074 | Bobby Castillo | Gaylord Perry | Bobby Castillo | Gaylord Perry | | 76 | 77 | -1 |
| 1983-04-21 | vs SEA | 15 | L 0-2 | 7-8 | 6 | 4,719 | Bryan Oelkers | Matt Young | Matt Young | Bryan Oelkers | Bill Caudill | 76 | 79 | -3 |
| 1983-04-22 | @ NYA | 16 | W 5-3 | 8-8 | 5 | 17,037 | Brad Havens | Doyle Alexander | Brad Havens | Doyle Alexander | Len Whitehouse | 81 | 82 | -1 |
| 1983-04-23 | @ NYA | 17 | L 4-7 | 8-9 | 5 | 20,146 | Jack O'Connor | Shane Rawley | Shane Rawley | Jack O'Connor | | 85 | 89 | -4 |
| 1983-04-25 | @ NYA | 18 | L 1-2 | 8-10 | 6 | 11,363 | Frank Viola | Ron Guidry | Ron Guidry | Frank Viola | | 86 | 91 | -5 |
| 1983-04-26 | @ CLE | 19 | L 1-7 | 8-11 | 6 | 4,493 | Bobby Castillo | Lary Sorensen | Lary Sorensen | Bobby Castillo | | 87 | 98 | -11 |
| 1983-04-27 | @ CLE | 20 | W 5-3 | 9-11 | 5 | 6,824 | Bryan Oelkers | Bert Blyleven | Albert Williams | Ed Glynn | Rick Lysander | 92 | 101 | -9 |
| 1983-04-29 | vs MIL | 21 | W 7-4 | 10-11 | 5 | 18,896 | Brad Havens | Bob McClure | Brad Havens | Bob McClure | Albert Williams | 99 | 105 | -6 |
| 1983-04-30 | vs MIL | 22 | W 9-7 | 11-11 | 5 | 23,267 | Jack O'Connor | Mike Caldwell | Ron Davis | Pete Ladd | | 108 | 112 | -4 |
| 1983-05-01 | vs MIL | 23 | L 4-8 | 11-12 | 5 | 24,703 | Frank Viola | Don Sutton | Don Sutton | Albert Williams | | 112 | 120 | -8 |
| 1983-05-03 | vs CLE | 24 | L 1-3 | 11-13 | 5 | 3,615 | Bobby Castillo | Bert Blyleven | Bert Blyleven | Bobby Castillo | Neal Heaton | 113 | 123 | -10 |
| 1983-05-04 | vs CLE | 25 | L 7-11 | 11-14 | 6 | 3,516 | Bryan Oelkers | Len Barker | Dan Spillner | Ron Davis | | 120 | 134 | -14 |
| 1983-05-05 | vs CLE | 26 | L 5-7 | 11-15 | 6 | 5,644 | Brad Havens | Rick Sutcliffe | Rick Sutcliffe | Brad Havens | Neal Heaton | 125 | 141 | -16 |
| 1983-05-06 | vs NYA | 27 | L 4-8 | 11-16 | 6 | 15,093 | Jack O'Connor | Ron Guidry | Ron Guidry | Jack O'Connor | Rich Gossage | 129 | 149 | -20 |
| 1983-05-07 | vs NYA | 28 | L 7-8 | 11-17 | 6 | 18,036 | Frank Viola | Dave Righetti | George Frazier | Albert Williams | Rich Gossage | 136 | 157 | -21 |
| 1983-05-08 | vs NYA | 29 | W 6-5 | 12-17 | 6 | 10,823 | Bobby Castillo | Bob Shirley | Len Whitehouse | Dale Murray | | 142 | 162 | -20 |
| 1983-05-10 | @ MIL | 30 | L 1-4 | 12-18 | 6 | 10,195 | Brad Havens | Moose Haas | Moose Haas | Brad Havens | Tom Tellmann | 143 | 166 | -23 |
| 1983-05-11 | @ MIL | 31 | L 1-4 | 12-19 | 6 | 14,549 | Albert Williams | Bob McClure | Bob McClure | Albert Williams | | 144 | 170 | -26 |
| 1983-05-13 | @ CAL | 32 | W 5-4 | 13-19 | 6 | 29,469 | Frank Viola | Geoff Zahn | Len Whitehouse | Mike Witt | Ron Davis | 149 | 174 | -25 |
| 1983-05-14 | @ CAL | 33 | W 2-1 | 14-19 | 5 | 44,047 | Bobby Castillo | Ken Forsch | Ken Schrom | Ken Forsch | Ron Davis | 151 | 175 | -24 |
| 1983-05-15 | @ CAL | 34 | W 8-6 | 15-19 | 5 | 30,840 | Jack O'Connor | Tommy John | Pete Filson | Dave Goltz | Ron Davis | 159 | 181 | -22 |
| 1983-05-16 | vs OAK | 35 | L 6-7 | 15-20 | 6 | 7,056 | Brad Havens | Mike Norris | Mike Norris | Brad Havens | Tom Burgmeier | 165 | 188 | -23 |
| 1983-05-17 | vs OAK | 36 | L 6-7 | 15-21 | 5 | 4,686 | Albert Williams | Chris Codiroli | Chris Codiroli | Albert Williams | Steve McCatty | 171 | 195 | -24 |
| 1983-05-18 | vs OAK | 37 | W 16-5 | 16-21 | 5 | 4,069 | Frank Viola | Bill Krueger | Frank Viola | Bill Krueger | | 187 | 200 | -13 |
| 1983-05-19 | @ BOS | 38 | L 1-4 | 16-22 | 5 | 14,173 | Bobby Castillo | Doug Bird | Doug Bird | Bobby Castillo | Luis Aponte | 188 | 204 | -16 |
| 1983-05-20 | @ BOS | 39 | W 10-4 | 17-22 | 5 | 19,332 | Ken Schrom | Bruce Hurst | Ken Schrom | Bruce Hurst | Rick Lysander | 198 | 208 | -10 |
| 1983-05-21 | @ BOS | 40 | L 4-11 | 17-23 | 5 | 24,856 | Brad Havens | Bob Ojeda | Bob Ojeda | Brad Havens | | 202 | 219 | -17 |
| 1983-05-22 | @ BOS | 41 | W 4-3 | 18-23 | 5 | 23,496 | Albert Williams | John Tudor | Ron Davis | Luis Aponte | | 206 | 222 | -16 |
| 1983-05-23 | @ BAL | 42 | W 12-4 | 19-23 | 5 | 16,985 | Frank Viola | Storm Davis | Frank Viola | Storm Davis | | 218 | 226 | -8 |
| 1983-05-24 | @ BAL | 43 | W 6-1 | 20-23 | 5 | 10,707 | Bobby Castillo | Scott McGregor | Bobby Castillo | Scott McGregor | | 224 | 227 | -3 |
| 1983-05-25 | @ BAL | 44 | W 7-4 | 21-23 | 5 | 17,791 | Ken Schrom | Dennis Martinez | Ken Schrom | Dennis Martinez | Ron Davis | 231 | 231 | 0 |
| 1983-05-27 | @ DET | 45 | L 4-7 | 21-25 | 5 | 0 | Brad Havens | Juan Berenguer | Larry Pashnick | Rick Lysander | Aurelio Lopez | 235 | 238 | -3 |
| 1983-05-27 | @ DET | 46 | L 1-2 | 21-25 | 5 | 18,806 | Pete Filson | Dave Rozema | Howard Bailey | Rick Lysander | | 236 | 240 | -4 |
| 1983-05-28 | @ DET | 47 | L 1-6 | 21-26 | 5 | 11,676 | Albert Williams | Milt Wilcox | Milt Wilcox | Albert Williams | | 237 | 246 | -9 |
| 1983-05-29 | @ DET | 48 | L 6-7 | 21-27 | 6 | 12,928 | Frank Viola | Jack Morris | Aurelio Lopez | Rick Lysander | | 243 | 253 | -10 |
| 1983-05-30 | vs BAL | 49 | L 1-6 | 21-28 | 6 | 14,916 | Bobby Castillo | Mike Boddicker | Mike Boddicker | Bobby Castillo | | 244 | 259 | -15 |
| 1983-05-31 | vs BAL | 50 | W 10-3 | 22-28 | 6 | 4,242 | Ken Schrom | Storm Davis | Ken Schrom | Storm Davis | | 254 | 262 | -8 |
| 1983-06-01 | vs BAL | 51 | L 3-6 | 22-29 | 6 | 5,564 | Pete Filson | Scott McGregor | Scott McGregor | Rick Lysander | Tippy Martinez | 257 | 268 | -11 |
| 1983-06-03 | vs BOS | 52 | L 3-6 | 22-30 | 6 | 8,996 | Albert Williams | Oil Can Boyd | Oil Can Boyd | Albert Williams | Bob Stanley | 260 | 274 | -14 |
| 1983-06-04 | vs BOS | 53 | L 6-8 | 22-31 | 6 | 8,788 | Frank Viola | Dennis Eckersley | Dennis Eckersley | Frank Viola | Luis Aponte | 266 | 282 | -16 |
| 1983-06-05 | vs BOS | 54 | W 10-4 | 23-31 | 6 | 7,892 | Brad Havens | Bruce Hurst | Brad Havens | Bruce Hurst | | 276 | 286 | -10 |
| 1983-06-07 | @ KCA | 55 | L 4-9 | 23-32 | 6 | 21,173 | Ken Schrom | Larry Gura | Larry Gura | Ken Schrom | Dan Quisenberry | 280 | 295 | -15 |
| 1983-06-08 | @ KCA | 56 | L 2-9 | 23-33 | 6 | 20,103 | Pete Filson | Steve Renko | Steve Renko | Pete Filson | Dan Quisenberry | 282 | 304 | -22 |
| 1983-06-09 | @ KCA | 57 | L 5-6 | 23-34 | 7 | 26,869 | Albert Williams | Keith Creel | Bill Castro | Rick Lysander | Dan Quisenberry | 287 | 310 | -23 |
| 1983-06-10 | vs TEX | 58 | L 2-4 | 23-35 | 7 | 5,282 | Frank Viola | Frank Tanana | Frank Tanana | Frank Viola | John Butcher | 289 | 314 | -25 |
| 1983-06-11 | vs TEX | 59 | L 0-11 | 23-36 | 7 | 11,363 | Brad Havens | Danny Darwin | Danny Darwin | Brad Havens | | 289 | 325 | -36 |
| 1983-06-12 | vs TEX | 60 | L 3-4 | 23-37 | 7 | 4,707 | Ken Schrom | Rick Honeycutt | Odell Jones | Ron Davis | | 292 | 329 | -37 |
| 1983-06-13 | vs KCA | 61 | W 9-4 | 24-37 | 7 | 10,897 | Bobby Castillo | Steve Renko | Bobby Castillo | Steve Renko | | 301 | 333 | -32 |
| 1983-06-14 | vs KCA | 62 | W 8-1 | 25-37 | 6 | 7,303 | Albert Williams | Keith Creel | Albert Williams | Keith Creel | | 309 | 334 | -25 |
| 1983-06-15 | vs KCA | 63 | W 6-2 | 26-37 | 6 | 7,136 | Frank Viola | Paul Splittorff | Frank Viola | Paul Splittorff | | 315 | 336 | -21 |
| 1983-06-16 | @ TEX | 64 | W 4-3 | 27-37 | 6 | 10,011 | Bryan Oelkers | Danny Darwin | Rick Lysander | Danny Darwin | Ron Davis | 319 | 339 | -20 |
| 1983-06-17 | @ TEX | 65 | L 1-10 | 27-38 | 6 | 15,610 | Ken Schrom | Rick Honeycutt | Rick Honeycutt | Ken Schrom | | 320 | 349 | -29 |
| 1983-06-18 | @ TEX | 66 | W 8-4 | 28-38 | 6 | 35,812 | Bobby Castillo | Mike Smithson | Bobby Castillo | Mike Smithson | Ron Davis | 328 | 353 | -25 |
| 1983-06-19 | @ TEX | 67 | L 1-4 | 28-39 | 6 | 15,166 | Albert Williams | Charlie Hough | Charlie Hough | Albert Williams | | 329 | 357 | -28 |
| 1983-06-20 | @ TOR | 68 | L 1-2 | 28-40 | 6 | 19,267 | Frank Viola | Jim Gott | Jim Gott | Ron Davis | | 330 | 359 | -29 |
| 1983-06-21 | @ TOR | 69 | L 3-8 | 28-41 | 6 | 23,473 | Bryan Oelkers | Jim Acker | Jim Acker | Bryan Oelkers | | 333 | 367 | -34 |
| 1983-06-22 | @ TOR | 70 | W 4-3 | 29-41 | 6 | 26,452 | Ken Schrom | Dave Stieb | Ken Schrom | Dave Stieb | Ron Davis | 337 | 370 | -33 |
| 1983-06-23 | @ CHA | 71 | L 6-8 | 29-42 | 6 | 19,886 | Bobby Castillo | Floyd Bannister | Floyd Bannister | Bobby Castillo | Dennis Lamp | 343 | 378 | -35 |
| 1983-06-24 | @ CHA | 72 | W 5-1 | 30-42 | 6 | 26,786 | Albert Williams | Britt Burns | Albert Williams | Britt Burns | Rick Lysander | 348 | 379 | -31 |
| 1983-06-25 | @ CHA | 73 | L 3-8 | 30-43 | 6 | 28,388 | Frank Viola | LaMarr Hoyt | LaMarr Hoyt | Frank Viola | Juan Agosto | 351 | 387 | -36 |
| 1983-06-26 | @ CHA | 74 | L 7-9 | 30-44 | 6 | 19,505 | Bryan Oelkers | Richard Dotson | Richard Dotson | Bryan Oelkers | Salome Barojas | 358 | 396 | -38 |
| 1983-06-28 | vs TOR | 75 | W 5-2 | 31-44 | 6 | 12,844 | Ken Schrom | Dave Stieb | Ken Schrom | Dave Stieb | Ron Davis | 363 | 398 | -35 |
| 1983-06-29 | vs TOR | 76 | L 2-4 | 31-45 | 6 | 8,242 | Bobby Castillo | Jim Clancy | Jim Clancy | Bobby Castillo | | 365 | 402 | -37 |
| 1983-06-30 | vs TOR | 77 | L 3-11 | 31-46 | 6 | 20,498 | Albert Williams | Luis Leal | Luis Leal | Albert Williams | | 368 | 413 | -45 |
| 1983-07-01 | vs CHA | 78 | W 6-3 | 32-46 | 6 | 8,101 | Frank Viola | LaMarr Hoyt | Frank Viola | LaMarr Hoyt | Ron Davis | 374 | 416 | -42 |
| 1983-07-02 | vs CHA | 79 | L 2-4 | 32-47 | 6 | 13,609 | Ken Schrom | Richard Dotson | Richard Dotson | Ken Schrom | Salome Barojas | 376 | 420 | -44 |
| 1983-07-03 | vs CHA | 80 | W 4-3 | 33-47 | 6 | 10,339 | Bobby Castillo | Jerry Koosman | Ron Davis | Salome Barojas | | 380 | 423 | -43 |
| 1983-07-04 | vs CHA | 81 | L 6-12 | 33-48 | 6 | 11,538 | Albert Williams | Floyd Bannister | Dennis Lamp | Rick Lysander | | 386 | 435 | -49 |
| 1983-07-08 | vs CLE | 82 | L 4-10 | 33-49 | 6 | 11,529 | Frank Viola | Bert Blyleven | Bert Blyleven | Frank Viola | | 390 | 445 | -55 |
| 1983-07-09 | vs CLE | 83 | W 3-2 | 34-49 | 6 | 11,683 | Ken Schrom | Rick Sutcliffe | Ken Schrom | Rick Sutcliffe | Ron Davis | 393 | 447 | -54 |
| 1983-07-10 | vs CLE | 84 | W 6-4 | 35-49 | 6 | 7,287 | Albert Williams | Juan Eichelberger | Albert Williams | Juan Eichelberger | Ron Davis | 399 | 451 | -52 |
| 1983-07-11 | vs NYA | 85 | W 4-2 | 36-49 | 6 | 16,835 | Bobby Castillo | Jay Howell | Bobby Castillo | Jay Howell | | 403 | 453 | -50 |
| 1983-07-12 | vs NYA | 86 | L 3-4 | 36-50 | 6 | 16,550 | Frank Viola | Matt Keough | George Frazier | Rick Lysander | | 406 | 457 | -51 |
| 1983-07-13 | vs NYA | 87 | W 6-1 | 37-50 | 6 | 22,148 | Ken Schrom | Ron Guidry | Ken Schrom | Ron Guidry | Ron Davis | 412 | 458 | -46 |
| 1983-07-14 | @ MIL | 88 | L 1-5 | 37-51 | 6 | 20,316 | Albert Williams | Don Sutton | Don Sutton | Albert Williams | | 413 | 463 | -50 |
| 1983-07-15 | @ MIL | 89 | L 3-6 | 37-52 | 6 | 28,343 | Bobby Castillo | Mike Caldwell | Mike Caldwell | Bobby Castillo | | 416 | 469 | -53 |
| 1983-07-16 | @ MIL | 90 | L 0-5 | 37-53 | 6 | 46,519 | Frank Viola | Moose Haas | Moose Haas | Frank Viola | | 416 | 474 | -58 |
| 1983-07-17 | @ MIL | 91 | L 6-10 | 37-54 | 6 | 41,021 | Ken Schrom | Chuck Porter | Chuck Porter | Ken Schrom | Jim Slaton | 422 | 484 | -62 |
| 1983-07-18 | @ NYA | 92 | L 2-4 | 37-55 | 6 | 20,448 | Albert Williams | Ron Guidry | Ron Guidry | Albert Williams | | 424 | 488 | -64 |
| 1983-07-19 | @ NYA | 93 | L 0-4 | 37-56 | 6 | 17,580 | Bobby Castillo | Shane Rawley | Shane Rawley | Bobby Castillo | | 424 | 492 | -68 |
| 1983-07-20 | @ NYA | 94 | L 4-6 | 37-57 | 6 | 27,583 | Frank Viola | Dave Righetti | Rich Gossage | Ron Davis | | 428 | 498 | -70 |
| 1983-07-22 | @ CLE | 95 | L 5-8 | 37-58 | 6 | 6,800 | Ken Schrom | Lary Sorensen | Jamie Easterly | Rick Lysander | Dan Spillner | 433 | 506 | -73 |
| 1983-07-23 | @ CLE | 96 | W 5-2 | 38-58 | 6 | 6,675 | Albert Williams | Len Barker | Albert Williams | Len Barker | Ron Davis | 438 | 508 | -70 |
| 1983-07-24 | @ CLE | 97 | W 7-5 | 40-58 | 6 | 0 | Bobby Castillo | Rick Sutcliffe | Bobby Castillo | Rick Sutcliffe | Ron Davis | 445 | 513 | -68 |
| 1983-07-24 | @ CLE | 98 | W 5-4 | 40-58 | 6 | 8,938 | Brad Havens | Tom Brennan | Brad Havens | Tom Brennan | Ron Davis | 450 | 517 | -67 |
| 1983-07-25 | vs MIL | 99 | W 17-3 | 41-58 | 6 | 24,527 | Frank Viola | Mike Caldwell | Frank Viola | Mike Caldwell | | 467 | 520 | -53 |
| 1983-07-26 | vs MIL | 100 | W 6-5 | 42-58 | 6 | 25,732 | Ken Schrom | Moose Haas | Len Whitehouse | Tom Tellmann | | 473 | 525 | -52 |
| 1983-07-27 | vs MIL | 101 | L 9-13 | 42-59 | 6 | 34,003 | Albert Williams | Chuck Porter | Jim Slaton | Brad Havens | | 482 | 538 | -56 |
| 1983-07-29 | vs SEA | 102 | W 4-3 | 43-59 | 6 | 13,066 | Bobby Castillo | Jim Beattie | Bobby Castillo | Bill Caudill | Ron Davis | 486 | 541 | -55 |
| 1983-07-30 | vs SEA | 103 | L 3-7 | 43-60 | 6 | 12,260 | Frank Viola | Glenn Abbott | Glenn Abbott | Frank Viola | Mike Stanton | 489 | 548 | -59 |
| 1983-07-31 | vs SEA | 104 | L 2-3 | 43-61 | 6 | 6,785 | Ken Schrom | Matt Young | Roy Thomas | Ron Davis | Bill Caudill | 491 | 551 | -60 |
| 1983-08-01 | vs CAL | 105 | L 6-12 | 44-62 | 6 | 0 | Brad Havens | Mike Witt | Mike Witt | Brad Havens | | 497 | 563 | -66 |
| 1983-08-01 | vs CAL | 106 | W 7-0 | 44-62 | 6 | 18,368 | Rick Lysander | Steve Brown | Rick Lysander | Steve Brown | | 504 | 563 | -59 |
| 1983-08-02 | vs CAL | 107 | L 1-2 | 44-63 | 6 | 13,064 | Bobby Castillo | Ken Forsch | Bruce Kison | Bobby Castillo | | 505 | 565 | -60 |
| 1983-08-03 | vs CAL | 108 | L 5-7 | 44-64 | 6 | 10,711 | Frank Viola | Tommy John | Bruce Kison | Mike Walters | | 510 | 572 | -62 |
| 1983-08-04 | vs OAK | 109 | W 4-3 | 45-64 | 6 | 12,457 | Ken Schrom | Steve McCatty | Len Whitehouse | Tom Burgmeier | | 514 | 575 | -61 |
| 1983-08-05 | vs OAK | 110 | L 2-3 | 45-65 | 6 | 8,203 | Jack O'Connor | Gorman Heimueller | Gorman Heimueller | Jack O'Connor | Dave Beard | 516 | 578 | -62 |
| 1983-08-06 | vs OAK | 111 | L 4-6 | 45-66 | 6 | 11,759 | Bobby Castillo | Mike Norris | Keith Atherton | Ron Davis | | 520 | 584 | -64 |
| 1983-08-07 | vs OAK | 112 | L 0-6 | 45-67 | 6 | 8,503 | Frank Viola | Chris Codiroli | Chris Codiroli | Frank Viola | Keith Atherton | 520 | 590 | -70 |
| 1983-08-08 | @ CAL | 113 | W 4-2 | 46-67 | 6 | 37,307 | Ken Schrom | Tommy John | Ken Schrom | Tommy John | | 524 | 592 | -68 |
| 1983-08-09 | @ CAL | 114 | L 2-8 | 46-68 | 6 | 25,443 | Rick Lysander | Rick Steirer | Rick Steirer | Rick Lysander | Bruce Kison | 526 | 600 | -74 |
| 1983-08-10 | @ CAL | 115 | W 4-1 | 47-68 | 6 | 27,510 | Bobby Castillo | Geoff Zahn | Bobby Castillo | Geoff Zahn | | 530 | 601 | -71 |
| 1983-08-11 | @ OAK | 116 | L 0-6 | 47-69 | 6 | 6,915 | Frank Viola | Chris Codiroli | Chris Codiroli | Frank Viola | | 530 | 607 | -77 |
| 1983-08-12 | @ OAK | 117 | W 5-3 | 48-69 | 6 | 10,735 | Ken Schrom | Mike Warren | Ken Schrom | Tom Underwood | Ron Davis | 535 | 610 | -75 |
| 1983-08-13 | @ OAK | 118 | W 7-3 | 49-69 | 6 | 18,028 | Albert Williams | Tim Conroy | Albert Williams | Tim Conroy | | 542 | 613 | -71 |
| 1983-08-14 | @ OAK | 119 | L 0-6 | 49-70 | 6 | 19,155 | Bobby Castillo | Steve McCatty | Steve McCatty | Bobby Castillo | | 542 | 619 | -77 |
| 1983-08-15 | @ SEA | 120 | W 7-4 | 50-70 | 6 | 6,005 | Frank Viola | Glenn Abbott | Frank Viola | Bryan Clark | Ron Davis | 549 | 623 | -74 |
| 1983-08-16 | @ SEA | 121 | W 5-1 | 51-70 | 6 | 6,891 | Ken Schrom | Matt Young | Ken Schrom | Matt Young | Ron Davis | 554 | 624 | -70 |
| 1983-08-17 | @ SEA | 122 | W 7-4 | 52-70 | 6 | 5,473 | Albert Williams | Mike Moore | Albert Williams | Mike Moore | Mike Walters | 561 | 628 | -67 |
| 1983-08-19 | vs DET | 123 | L 1-5 | 52-71 | 6 | 13,437 | Bobby Castillo | Jack Morris | Jack Morris | Bobby Castillo | | 562 | 633 | -71 |
| 1983-08-20 | vs DET | 124 | L 1-9 | 52-72 | 6 | 13,646 | Frank Viola | Juan Berenguer | Juan Berenguer | Frank Viola | | 563 | 642 | -79 |
| 1983-08-21 | vs DET | 125 | W 4-3 | 53-72 | 6 | 10,799 | Ken Schrom | Larry Pashnick | Ken Schrom | Larry Pashnick | Ron Davis | 567 | 645 | -78 |
| 1983-08-23 | vs BOS | 126 | W 3-2 | 54-72 | 6 | 12,686 | Albert Williams | Oil Can Boyd | Albert Williams | Oil Can Boyd | Ron Davis | 570 | 647 | -77 |
| 1983-08-24 | vs BOS | 127 | W 8-7 | 55-72 | 6 | 13,325 | Bobby Castillo | John Tudor | Len Whitehouse | Bob Stanley | Ron Davis | 578 | 654 | -76 |
| 1983-08-25 | vs BOS | 128 | W 5-2 | 56-72 | 6 | 11,250 | Frank Viola | Dennis Eckersley | Frank Viola | Dennis Eckersley | | 583 | 656 | -73 |
| 1983-08-26 | @ BAL | 129 | L 0-9 | 56-73 | 6 | 23,988 | Ken Schrom | Mike Boddicker | Mike Boddicker | Ken Schrom | | 583 | 665 | -82 |
| 1983-08-27 | @ BAL | 130 | L 3-5 | 56-74 | 6 | 33,921 | Albert Williams | Jim Palmer | Jim Palmer | Albert Williams | Tim Stoddard | 586 | 670 | -84 |
| 1983-08-28 | @ BAL | 131 | L 4-11 | 56-75 | 6 | 30,922 | Bobby Castillo | Mike Flanagan | Mike Flanagan | Bobby Castillo | Sammy Stewart | 590 | 681 | -91 |
| 1983-08-29 | @ DET | 132 | W 5-4 | 57-75 | 6 | 25,875 | Frank Viola | Juan Berenguer | Rick Lysander | Aurelio Lopez | Ron Davis | 595 | 685 | -90 |
| 1983-08-30 | @ DET | 133 | L 3-4 | 57-76 | 6 | 15,280 | Ken Schrom | Dan Petry | Dan Petry | Ken Schrom | | 598 | 689 | -91 |
| 1983-09-01 | @ BOS | 134 | W 11-0 | 58-77 | 6 | 0 | Albert Williams | Dennis Eckersley | Albert Williams | Dennis Eckersley | | 609 | 689 | -80 |
| 1983-09-01 | @ BOS | 135 | L 3-9 | 58-77 | 6 | 18,860 | Rick Lysander | Bob Ojeda | Bob Ojeda | Rick Lysander | | 612 | 698 | -86 |
| 1983-09-02 | vs BAL | 136 | L 0-1 | 58-78 | 6 | 7,996 | Frank Viola | Mike Flanagan | Mike Flanagan | Frank Viola | Tim Stoddard | 612 | 699 | -87 |
| 1983-09-03 | vs BAL | 137 | L 0-13 | 58-79 | 6 | 9,230 | Ken Schrom | Scott McGregor | Scott McGregor | Ken Schrom | | 612 | 712 | -100 |
| 1983-09-04 | vs BAL | 138 | L 6-9 | 58-80 | 6 | 8,296 | Pete Filson | Storm Davis | Storm Davis | Ron Davis | Tippy Martinez | 618 | 721 | -103 |
| 1983-09-05 | @ TEX | 139 | L 3-7 | 58-81 | 6 | 5,124 | Rick Lysander | John Butcher | John Butcher | Rick Lysander | | 621 | 728 | -107 |
| 1983-09-06 | @ TEX | 140 | W 5-3 | 59-81 | 6 | 7,057 | Frank Viola | Frank Tanana | Ron Davis | Frank Tanana | Mike Walters | 626 | 731 | -105 |
| 1983-09-07 | @ TEX | 141 | L 0-3 | 59-82 | 6 | 5,634 | Albert Williams | Charlie Hough | Charlie Hough | Albert Williams | | 626 | 734 | -108 |
| 1983-09-09 | vs KCA | 142 | W 7-6 | 60-82 | 6 | 5,400 | Ken Schrom | Gaylord Perry | Jack O'Connor | Mike Armstrong | | 633 | 740 | -107 |
| 1983-09-10 | vs KCA | 143 | W 6-3 | 61-82 | 6 | 6,354 | Pete Filson | Eric Rasmussen | Pete Filson | Eric Rasmussen | Ron Davis | 639 | 743 | -104 |
| 1983-09-11 | vs KCA | 144 | L 1-3 | 61-83 | 6 | 4,820 | Jay Pettibone | Frank Wills | Danny Jackson | Jay Pettibone | Dan Quisenberry | 640 | 746 | -106 |
| 1983-09-13 | vs CHA | 145 | L 1-5 | 61-84 | 6 | 6,210 | Frank Viola | Richard Dotson | Richard Dotson | Frank Viola | | 641 | 751 | -110 |
| 1983-09-14 | vs CHA | 146 | W 1-0 | 62-84 | 6 | 6,650 | Albert Williams | Britt Burns | Ron Davis | Britt Burns | | 642 | 751 | -109 |
| 1983-09-15 | vs TOR | 147 | W 6-2 | 63-84 | 6 | 4,039 | Ken Schrom | Dave Stieb | Ken Schrom | Dave Stieb | | 648 | 753 | -105 |
| 1983-09-16 | vs TOR | 148 | W 11-4 | 64-84 | 6 | 11,640 | Pete Filson | Jim Gott | Rick Lysander | Jim Gott | | 659 | 757 | -98 |
| 1983-09-17 | vs TOR | 149 | L 3-13 | 64-85 | 6 | 6,300 | Jay Pettibone | Luis Leal | Luis Leal | Jay Pettibone | | 662 | 770 | -108 |
| 1983-09-19 | @ CHA | 150 | W 7-5 | 65-85 | 5 | 29,138 | Frank Viola | Britt Burns | Mike Walters | Salome Barojas | Ron Davis | 669 | 775 | -106 |
| 1983-09-21 | @ CHA | 151 | L 1-2 | 65-87 | 6 | 0 | Ken Schrom | LaMarr Hoyt | LaMarr Hoyt | Ken Schrom | | 670 | 777 | -107 |
| 1983-09-21 | @ CHA | 152 | L 6-7 | 65-87 | 6 | 37,806 | Albert Williams | Floyd Bannister | Guy Hoffman | Ron Davis | | 676 | 784 | -108 |
| 1983-09-22 | @ KCA | 153 | W 2-1 | 66-87 | 6 | 15,684 | Pete Filson | Eric Rasmussen | Pete Filson | Eric Rasmussen | Ron Davis | 678 | 785 | -107 |
| 1983-09-23 | @ KCA | 154 | L 2-3 | 66-88 | 6 | 18,313 | Jay Pettibone | Frank Wills | Frank Wills | Jay Pettibone | Dan Quisenberry | 680 | 788 | -108 |
| 1983-09-24 | @ KCA | 155 | L 4-12 | 66-89 | 6 | 17,407 | Frank Viola | Buddy Black | Buddy Black | Frank Viola | | 684 | 800 | -116 |
| 1983-09-25 | @ KCA | 156 | W 7-1 | 67-89 | 5 | 22,695 | Ken Schrom | Danny Jackson | Ken Schrom | Danny Jackson | | 691 | 801 | -110 |
| 1983-09-27 | vs TEX | 157 | L 1-6 | 67-90 | 6 | 3,000 | Albert Williams | Mike Smithson | Mike Smithson | Albert Williams | | 692 | 807 | -115 |
| 1983-09-28 | vs TEX | 158 | W 3-0 | 68-90 | 5 | 4,084 | Pete Filson | Danny Darwin | Pete Filson | Danny Darwin | Ron Davis | 695 | 807 | -112 |
| 1983-09-29 | vs TEX | 159 | W 2-0 | 69-90 | 5 | 4,395 | Ken Schrom | Dave Stewart | Ken Schrom | Dave Stewart | | 697 | 807 | -110 |
| 1983-09-30 | @ TOR | 160 | L 0-8 | 69-91 | 5 | 18,501 | Frank Viola | Dave Stieb | Dave Stieb | Frank Viola | | 697 | 815 | -118 |
| 1983-10-01 | @ TOR | 161 | L 3-4 | 69-92 | 5 | 25,332 | Jay Pettibone | Doyle Alexander | Doyle Alexander | Jay Pettibone | | 700 | 819 | -119 |
| 1983-10-02 | @ TOR | 162 | W 9-3 | 70-92 | 5 | 40,692 | Albert Williams | Jim Clancy | Albert Williams | Jim Clancy | | 709 | 822 | -113 |