| 1983-04-05 | vs NYA | 1 | W 5-4 | 1-0 | 2 | 37,015 | Gaylord Perry | Ron Guidry | Bryan Clark | Roger Erickson | Bill Caudill | 5 | 4 | 1 |
| 1983-04-06 | vs NYA | 2 | W 6-2 | 2-0 | 1 | 12,870 | Matt Young | Bob Shirley | Matt Young | Bob Shirley | Mike Stanton | 11 | 6 | 5 |
| 1983-04-07 | vs NYA | 3 | L 1-8 | 2-1 | 2 | 13,843 | Bob Stoddard | Dave Righetti | Dave Righetti | Bob Stoddard | George Frazier | 12 | 14 | -2 |
| 1983-04-08 | vs MIN | 4 | L 4-5 | 2-2 | 5 | 6,662 | Mike Moore | Frank Viola | Rick Lysander | Bill Caudill | Len Whitehouse | 16 | 19 | -3 |
| 1983-04-09 | vs MIN | 5 | W 3-2 | 3-2 | 3 | 21,100 | Ed Nunez | Bryan Oelkers | Roy Thomas | Bryan Oelkers | Bill Caudill | 19 | 21 | -2 |
| 1983-04-10 | vs MIN | 6 | L 3-6 | 3-3 | 5 | 7,869 | Gaylord Perry | Brad Havens | Brad Havens | Gaylord Perry | Ron Davis | 22 | 27 | -5 |
| 1983-04-11 | @ CAL | 7 | L 1-6 | 3-4 | 6 | 22,588 | Matt Young | Tommy John | Tommy John | Matt Young | | 23 | 33 | -10 |
| 1983-04-12 | @ CAL | 8 | W 8-1 | 4-4 | 4 | 22,912 | Bob Stoddard | Mike Witt | Bob Stoddard | Mike Witt | | 31 | 34 | -3 |
| 1983-04-13 | @ CAL | 9 | L 1-6 | 4-5 | 5 | 24,002 | Mike Moore | Geoff Zahn | Geoff Zahn | Mike Moore | | 32 | 40 | -8 |
| 1983-04-14 | vs OAK | 10 | L 3-5 | 4-6 | 6 | 4,600 | Ed Nunez | Chris Codiroli | Chris Codiroli | Ed Nunez | Dave Beard | 35 | 45 | -10 |
| 1983-04-15 | vs OAK | 11 | W 5-1 | 5-6 | 5 | 6,175 | Gaylord Perry | Matt Keough | Gaylord Perry | Matt Keough | | 40 | 46 | -6 |
| 1983-04-16 | vs OAK | 12 | L 2-5 | 5-7 | 6 | 22,234 | Matt Young | Bill Krueger | Bill Krueger | Matt Young | Dave Beard | 42 | 51 | -9 |
| 1983-04-17 | vs OAK | 13 | L 4-7 | 5-8 | 6 | 5,153 | Bob Stoddard | Mike Norris | Mike Norris | Bob Stoddard | Tom Burgmeier | 46 | 58 | -12 |
| 1983-04-18 | @ MIN | 14 | L 5-8 | 5-9 | 7 | 2,416 | Mike Moore | Jack O'Connor | Jack O'Connor | Mike Moore | Pete Filson | 51 | 66 | -15 |
| 1983-04-19 | @ MIN | 15 | L 2-6 | 5-10 | 7 | 3,336 | Ed Nunez | Albert Williams | Len Whitehouse | Ed Nunez | | 53 | 72 | -19 |
| 1983-04-20 | @ MIN | 16 | L 2-11 | 5-11 | 7 | 3,074 | Gaylord Perry | Bobby Castillo | Bobby Castillo | Gaylord Perry | | 55 | 83 | -28 |
| 1983-04-21 | @ MIN | 17 | W 2-0 | 6-11 | 7 | 4,719 | Matt Young | Bryan Oelkers | Matt Young | Bryan Oelkers | Bill Caudill | 57 | 83 | -26 |
| 1983-04-22 | @ DET | 18 | L 0-4 | 6-12 | 7 | 12,696 | Bob Stoddard | Milt Wilcox | Milt Wilcox | Bob Stoddard | | 57 | 87 | -30 |
| 1983-04-23 | @ DET | 19 | L 0-4 | 6-13 | 7 | 12,393 | Mike Moore | Dan Petry | Dan Petry | Mike Moore | | 57 | 91 | -34 |
| 1983-04-24 | @ DET | 20 | L 2-4 | 6-14 | 7 | 11,801 | Ed Nunez | Jack Morris | Jack Morris | Ed Nunez | Aurelio Lopez | 59 | 95 | -36 |
| 1983-04-26 | vs BOS | 21 | W 7-6 | 7-14 | 7 | 1,891 | Gaylord Perry | Mike Brown | Gaylord Perry | Mike Brown | Bill Caudill | 66 | 101 | -35 |
| 1983-04-27 | vs BOS | 22 | L 1-2 | 7-15 | 7 | 6,548 | Matt Young | Dennis Eckersley | Dennis Eckersley | Matt Young | Bob Stanley | 67 | 103 | -36 |
| 1983-04-29 | vs BAL | 23 | L 1-9 | 7-16 | 7 | 7,371 | Jim Beattie | Scott McGregor | Scott McGregor | Jim Beattie | | 68 | 112 | -44 |
| 1983-04-30 | vs BAL | 24 | W 6-2 | 8-16 | 7 | 21,093 | Bob Stoddard | Dennis Martinez | Bob Stoddard | Dennis Martinez | Ed Vande Berg | 74 | 114 | -40 |
| 1983-05-01 | vs BAL | 25 | L 2-8 | 8-17 | 7 | 7,602 | Gaylord Perry | Storm Davis | Storm Davis | Gaylord Perry | Tippy Martinez | 76 | 122 | -46 |
| 1983-05-03 | vs DET | 26 | L 1-2 | 8-18 | 7 | 14,124 | Matt Young | Dan Petry | Aurelio Lopez | Bill Caudill | | 77 | 124 | -47 |
| 1983-05-04 | vs DET | 27 | W 5-1 | 9-18 | 7 | 4,698 | Jim Beattie | Jack Morris | Jim Beattie | Jack Morris | Roy Thomas | 82 | 125 | -43 |
| 1983-05-06 | @ BOS | 28 | L 4-6 | 9-19 | 7 | 18,241 | Gaylord Perry | John Tudor | Luis Aponte | Ed Vande Berg | | 86 | 131 | -45 |
| 1983-05-07 | @ BOS | 29 | L 0-8 | 9-20 | 7 | 24,076 | Bob Stoddard | Mike Brown | Mike Brown | Bob Stoddard | | 86 | 139 | -53 |
| 1983-05-08 | @ BOS | 30 | W 4-2 | 10-20 | 7 | 16,997 | Matt Young | Doug Bird | Matt Young | Doug Bird | Bill Caudill | 90 | 141 | -51 |
| 1983-05-09 | @ BAL | 31 | W 6-4 | 11-20 | 7 | 9,605 | Jim Beattie | Scott McGregor | Jim Beattie | Scott McGregor | Bill Caudill | 96 | 145 | -49 |
| 1983-05-10 | @ BAL | 32 | L 2-13 | 11-21 | 7 | 8,508 | Ed Nunez | Dennis Martinez | Dennis Martinez | Ed Nunez | | 98 | 158 | -60 |
| 1983-05-11 | @ BAL | 33 | L 0-1 | 11-22 | 7 | 10,208 | Gaylord Perry | Mike Flanagan | Mike Flanagan | Gaylord Perry | | 98 | 159 | -61 |
| 1983-05-13 | @ OAK | 34 | L 2-9 | 11-23 | 7 | 10,484 | Bob Stoddard | Bill Krueger | Bill Krueger | Bob Stoddard | | 100 | 168 | -68 |
| 1983-05-14 | @ OAK | 35 | W 4-1 | 12-23 | 7 | 17,097 | Matt Young | Rick Langford | Matt Young | Rick Langford | Bill Caudill | 104 | 169 | -65 |
| 1983-05-15 | @ OAK | 36 | L 0-3 | 12-24 | 7 | 24,664 | Jim Beattie | Tom Underwood | Tom Underwood | Jim Beattie | Steve McCatty | 104 | 172 | -68 |
| 1983-05-17 | vs CAL | 37 | L 1-3 | 12-25 | 7 | 7,313 | Gaylord Perry | Bruce Kison | Bruce Kison | Gaylord Perry | | 105 | 175 | -70 |
| 1983-05-18 | vs CAL | 38 | W 2-1 | 13-25 | 7 | 6,299 | Bob Stoddard | Geoff Zahn | Bob Stoddard | Geoff Zahn | Bill Caudill | 107 | 176 | -69 |
| 1983-05-19 | vs CAL | 39 | W 1-0 | 14-25 | 7 | 6,585 | Matt Young | Ken Forsch | Matt Young | Ken Forsch | | 108 | 176 | -68 |
| 1983-05-20 | vs MIL | 40 | L 3-4 | 14-26 | 7 | 7,536 | Jim Beattie | Moose Haas | Tom Tellmann | Bryan Clark | | 111 | 180 | -69 |
| 1983-05-21 | vs MIL | 41 | W 5-4 | 15-26 | 7 | 21,280 | Gene Nelson | Bob McClure | Bryan Clark | Bob McClure | | 116 | 184 | -68 |
| 1983-05-22 | vs MIL | 42 | L 0-6 | 15-27 | 7 | 37,807 | Gaylord Perry | Mike Caldwell | Mike Caldwell | Gaylord Perry | | 116 | 190 | -74 |
| 1983-05-23 | vs CLE | 43 | W 3-2 | 16-27 | 7 | 4,332 | Bob Stoddard | Rick Sutcliffe | Bob Stoddard | Rick Sutcliffe | Bill Caudill | 119 | 192 | -73 |
| 1983-05-24 | vs CLE | 44 | L 4-6 | 16-28 | 7 | 5,161 | Matt Young | Lary Sorensen | Neal Heaton | Bill Caudill | | 123 | 198 | -75 |
| 1983-05-25 | vs CLE | 45 | W 2-1 | 17-28 | 7 | 5,057 | Jim Beattie | Juan Eichelberger | Jim Beattie | Juan Eichelberger | Mike Stanton | 125 | 199 | -74 |
| 1983-05-27 | @ MIL | 46 | W 7-5 | 18-28 | 7 | 14,762 | Gaylord Perry | Bob McClure | Gaylord Perry | Tom Tellmann | Bill Caudill | 132 | 204 | -72 |
| 1983-05-28 | @ MIL | 47 | W 4-3 | 19-28 | 7 | 28,880 | Bob Stoddard | Mike Caldwell | Ed Vande Berg | Jim Slaton | | 136 | 207 | -71 |
| 1983-05-29 | @ MIL | 48 | W 6-4 | 20-28 | 7 | 25,301 | Matt Young | Don Sutton | Matt Young | Don Sutton | Bill Caudill | 142 | 211 | -69 |
| 1983-05-30 | @ MIL | 49 | L 3-6 | 20-29 | 7 | 18,673 | Jim Beattie | Jerry Augustine | Jerry Augustine | Jim Beattie | Tom Tellmann | 145 | 217 | -72 |
| 1983-05-31 | @ CLE | 50 | L 2-5 | 20-30 | 7 | 3,057 | Gene Nelson | Juan Eichelberger | Juan Eichelberger | Gene Nelson | Dan Spillner | 147 | 222 | -75 |
| 1983-06-01 | @ CLE | 51 | L 2-5 | 20-31 | 7 | 4,702 | Gaylord Perry | Bert Blyleven | Neal Heaton | Gaylord Perry | | 149 | 227 | -78 |
| 1983-06-02 | @ CLE | 52 | L 1-3 | 20-32 | 7 | 4,052 | Bob Stoddard | Rick Sutcliffe | Rick Sutcliffe | Bob Stoddard | | 150 | 230 | -80 |
| 1983-06-03 | @ NYA | 53 | W 5-0 | 21-32 | 7 | 18,546 | Matt Young | Jay Howell | Matt Young | Jay Howell | | 155 | 230 | -75 |
| 1983-06-04 | @ NYA | 54 | W 5-4 | 22-32 | 7 | 17,792 | Jim Beattie | Bob Shirley | Jim Beattie | Bob Shirley | Bill Caudill | 160 | 234 | -74 |
| 1983-06-05 | @ NYA | 55 | W 8-7 | 23-32 | 7 | 55,593 | Gene Nelson | Shane Rawley | Bryan Clark | Shane Rawley | Bill Caudill | 168 | 241 | -73 |
| 1983-06-06 | @ NYA | 56 | L 2-6 | 23-33 | 7 | 13,864 | Gaylord Perry | Ron Guidry | Ron Guidry | Ed Vande Berg | | 170 | 247 | -77 |
| 1983-06-07 | vs TEX | 57 | L 0-10 | 23-34 | 7 | 5,284 | Bob Stoddard | Rick Honeycutt | Rick Honeycutt | Bob Stoddard | | 170 | 257 | -87 |
| 1983-06-08 | vs TEX | 58 | L 0-1 | 23-35 | 7 | 6,529 | Matt Young | Mike Smithson | Mike Smithson | Matt Young | Odell Jones | 170 | 258 | -88 |
| 1983-06-09 | vs TEX | 59 | W 3-2 | 24-35 | 6 | 4,915 | Jim Beattie | Charlie Hough | Bill Caudill | Charlie Hough | | 173 | 260 | -87 |
| 1983-06-10 | vs KCA | 60 | L 0-2 | 24-36 | 6 | 8,721 | Bob Stoddard | Paul Splittorff | Paul Splittorff | Bob Stoddard | Mike Armstrong | 173 | 262 | -89 |
| 1983-06-11 | vs KCA | 61 | L 1-4 | 24-37 | 6 | 16,661 | Gaylord Perry | Buddy Black | Buddy Black | Gaylord Perry | Dan Quisenberry | 174 | 266 | -92 |
| 1983-06-12 | vs KCA | 62 | W 8-1 | 25-37 | 6 | 11,833 | Glenn Abbott | Larry Gura | Glenn Abbott | Larry Gura | | 182 | 267 | -85 |
| 1983-06-13 | @ TEX | 63 | L 2-5 | 25-38 | 6 | 31,238 | Matt Young | Mike Smithson | Mike Smithson | Matt Young | John Butcher | 184 | 272 | -88 |
| 1983-06-14 | @ TEX | 64 | L 1-7 | 25-39 | 7 | 11,118 | Jim Beattie | Charlie Hough | Charlie Hough | Jim Beattie | | 185 | 279 | -94 |
| 1983-06-15 | @ TEX | 65 | W 6-4 | 26-39 | 7 | 12,604 | Bob Stoddard | Frank Tanana | Ed Vande Berg | Odell Jones | | 191 | 283 | -92 |
| 1983-06-17 | @ KCA | 66 | L 1-3 | 26-40 | 7 | 26,130 | Gaylord Perry | Larry Gura | Larry Gura | Gaylord Perry | Dan Quisenberry | 192 | 286 | -94 |
| 1983-06-18 | @ KCA | 67 | L 5-6 | 26-41 | 7 | 24,254 | Glenn Abbott | Buddy Black | Dan Quisenberry | Bill Caudill | | 197 | 292 | -95 |
| 1983-06-19 | @ KCA | 68 | L 2-4 | 26-42 | 7 | 27,174 | Matt Young | Keith Creel | Bill Castro | Matt Young | Mike Armstrong | 199 | 296 | -97 |
| 1983-06-20 | @ CHA | 69 | L 3-7 | 26-43 | 7 | 16,602 | Jim Beattie | LaMarr Hoyt | LaMarr Hoyt | Jim Beattie | | 202 | 303 | -101 |
| 1983-06-21 | @ CHA | 70 | L 2-4 | 26-44 | 7 | 16,273 | Bob Stoddard | Richard Dotson | Richard Dotson | Bob Stoddard | Juan Agosto | 204 | 307 | -103 |
| 1983-06-22 | @ CHA | 71 | L 3-6 | 26-45 | 7 | 15,514 | Gaylord Perry | Jerry Koosman | Jerry Koosman | Gaylord Perry | Salome Barojas | 207 | 313 | -106 |
| 1983-06-23 | vs TOR | 72 | L 4-5 | 26-46 | 7 | 6,303 | Glenn Abbott | Jim Clancy | Jim Clancy | Mike Stanton | Joey McLaughlin | 211 | 318 | -107 |
| 1983-06-24 | vs TOR | 73 | L 2-4 | 26-47 | 7 | 6,389 | Matt Young | Luis Leal | Luis Leal | Matt Young | | 213 | 322 | -109 |
| 1983-06-25 | vs TOR | 74 | W 5-2 | 27-47 | 7 | 15,048 | Jim Beattie | Jim Gott | Jim Beattie | Jim Gott | Bill Caudill | 218 | 324 | -106 |
| 1983-06-26 | vs TOR | 75 | L 7-19 | 27-48 | 7 | 6,593 | Bob Stoddard | Jim Acker | Jim Acker | Bob Stoddard | | 225 | 343 | -118 |
| 1983-06-27 | vs CHA | 76 | L 4-7 | 27-49 | 7 | 7,412 | Bryan Clark | Jerry Koosman | Dennis Lamp | Bryan Clark | Juan Agosto | 229 | 350 | -121 |
| 1983-06-28 | vs CHA | 77 | W 6-2 | 28-49 | 7 | 20,683 | Glenn Abbott | Floyd Bannister | Glenn Abbott | Floyd Bannister | Bill Caudill | 235 | 352 | -117 |
| 1983-06-29 | vs CHA | 78 | L 3-5 | 28-50 | 7 | 7,342 | Matt Young | Britt Burns | Britt Burns | Matt Young | Salome Barojas | 238 | 357 | -119 |
| 1983-07-01 | @ TOR | 79 | W 11-2 | 29-50 | 7 | 36,572 | Jim Beattie | Jim Gott | Jim Beattie | Jim Gott | | 249 | 359 | -110 |
| 1983-07-02 | @ TOR | 80 | L 6-7 | 29-51 | 7 | 21,783 | Mike Moore | Jim Acker | Roy Lee Jackson | Bill Caudill | | 255 | 366 | -111 |
| 1983-07-03 | @ TOR | 81 | W 4-1 | 30-51 | 7 | 32,161 | Glenn Abbott | Dave Stieb | Glenn Abbott | Dave Stieb | | 259 | 367 | -108 |
| 1983-07-08 | @ BAL | 82 | W 3-0 | 31-51 | 7 | 17,164 | Jim Beattie | Storm Davis | Jim Beattie | Storm Davis | | 262 | 367 | -105 |
| 1983-07-09 | @ BAL | 83 | W 3-2 | 32-51 | 7 | 20,791 | Glenn Abbott | Scott McGregor | Bill Caudill | Sammy Stewart | | 265 | 369 | -104 |
| 1983-07-10 | @ BAL | 84 | L 0-2 | 32-52 | 7 | 34,289 | Matt Young | Mike Boddicker | Mike Boddicker | Matt Young | | 265 | 371 | -106 |
| 1983-07-11 | @ BOS | 85 | L 5-6 | 32-53 | 7 | 19,384 | Mike Moore | Bob Ojeda | Luis Aponte | Mike Stanton | | 270 | 377 | -107 |
| 1983-07-12 | @ BOS | 86 | W 3-2 | 33-53 | 7 | 18,846 | Bryan Clark | Mike Brown | Bryan Clark | Mike Brown | Bill Caudill | 273 | 379 | -106 |
| 1983-07-13 | @ BOS | 87 | W 6-4 | 34-53 | 7 | 18,708 | Jim Beattie | Dennis Eckersley | Jim Beattie | Dennis Eckersley | Bill Caudill | 279 | 383 | -104 |
| 1983-07-14 | vs DET | 88 | L 2-4 | 34-54 | 7 | 9,551 | Glenn Abbott | Jack Morris | Jack Morris | Glenn Abbott | Doug Bair | 281 | 387 | -106 |
| 1983-07-15 | vs DET | 89 | W 7-2 | 35-54 | 7 | 8,607 | Matt Young | Juan Berenguer | Matt Young | Juan Berenguer | | 288 | 389 | -101 |
| 1983-07-16 | vs DET | 90 | W 1-0 | 36-54 | 7 | 13,018 | Mike Moore | Dave Rozema | Mike Moore | Aurelio Lopez | | 289 | 389 | -100 |
| 1983-07-17 | vs DET | 91 | L 1-8 | 36-55 | 7 | 11,986 | Bryan Clark | Milt Wilcox | Doug Bair | Bill Caudill | | 290 | 397 | -107 |
| 1983-07-18 | vs BAL | 92 | L 4-9 | 36-56 | 7 | 7,309 | Jim Beattie | Storm Davis | Storm Davis | Jim Beattie | | 294 | 406 | -112 |
| 1983-07-19 | vs BAL | 93 | L 1-8 | 36-57 | 7 | 14,670 | Glenn Abbott | Scott McGregor | Scott McGregor | Glenn Abbott | | 295 | 414 | -119 |
| 1983-07-20 | vs BAL | 94 | L 2-4 | 36-58 | 7 | 7,444 | Matt Young | Mike Boddicker | Sammy Stewart | Matt Young | Tim Stoddard | 297 | 418 | -121 |
| 1983-07-21 | vs BOS | 95 | L 13-14 | 36-59 | 7 | 8,143 | Mike Moore | Bob Ojeda | John Henry Johnson | Ed Vande Berg | Bob Stanley | 310 | 432 | -122 |
| 1983-07-22 | vs BOS | 96 | L 4-5 | 36-60 | 7 | 9,584 | Bryan Clark | Mike Brown | Mike Brown | Ed Vande Berg | John Henry Johnson | 314 | 437 | -123 |
| 1983-07-23 | vs BOS | 97 | W 5-0 | 37-60 | 7 | 15,113 | Bob Stoddard | Dennis Eckersley | Bob Stoddard | Dennis Eckersley | | 319 | 437 | -118 |
| 1983-07-24 | vs BOS | 98 | L 0-6 | 37-61 | 7 | 8,616 | Glenn Abbott | John Tudor | John Tudor | Glenn Abbott | | 319 | 443 | -124 |
| 1983-07-26 | @ DET | 99 | L 3-8 | 37-62 | 7 | 24,465 | Matt Young | Dave Rozema | Dave Rozema | Matt Young | Juan Berenguer | 322 | 451 | -129 |
| 1983-07-27 | @ DET | 100 | W 5-3 | 38-62 | 7 | 23,270 | Mike Moore | Milt Wilcox | Mike Moore | Doug Bair | Bill Caudill | 327 | 454 | -127 |
| 1983-07-28 | @ DET | 101 | L 1-6 | 38-63 | 7 | 17,207 | Bryan Clark | Dan Petry | Dan Petry | Bryan Clark | | 328 | 460 | -132 |
| 1983-07-29 | @ MIN | 102 | L 3-4 | 38-64 | 7 | 13,066 | Jim Beattie | Bobby Castillo | Bobby Castillo | Bill Caudill | Ron Davis | 331 | 464 | -133 |
| 1983-07-30 | @ MIN | 103 | W 7-3 | 39-64 | 7 | 12,260 | Glenn Abbott | Frank Viola | Glenn Abbott | Frank Viola | Mike Stanton | 338 | 467 | -129 |
| 1983-07-31 | @ MIN | 104 | W 3-2 | 40-64 | 7 | 6,785 | Matt Young | Ken Schrom | Roy Thomas | Ron Davis | Bill Caudill | 341 | 469 | -128 |
| 1983-08-01 | vs OAK | 105 | L 3-4 | 40-65 | 7 | 6,510 | Mike Moore | Mike Norris | Tom Underwood | Mike Stanton | Dave Beard | 344 | 473 | -129 |
| 1983-08-02 | vs OAK | 106 | W 15-12 | 41-65 | 7 | 5,833 | Bryan Clark | Bill Krueger | Roy Thomas | Chris Codiroli | Ed Vande Berg | 359 | 485 | -126 |
| 1983-08-03 | vs OAK | 107 | L 1-6 | 41-66 | 7 | 6,261 | Jim Beattie | Tim Conroy | Tim Conroy | Jim Beattie | | 360 | 491 | -131 |
| 1983-08-04 | vs CAL | 108 | W 11-5 | 42-66 | 7 | 8,865 | Glenn Abbott | Rick Steirer | Bryan Clark | John Curtis | Ed Vande Berg | 371 | 496 | -125 |
| 1983-08-05 | vs CAL | 109 | W 3-1 | 43-66 | 7 | 7,313 | Matt Young | Geoff Zahn | Bob Stoddard | Geoff Zahn | Bill Caudill | 374 | 497 | -123 |
| 1983-08-06 | vs CAL | 110 | W 2-1 | 44-66 | 7 | 26,440 | Mike Moore | Mike Witt | Mike Moore | Mike Witt | Bill Caudill | 376 | 498 | -122 |
| 1983-08-07 | vs CAL | 111 | L 3-4 | 44-67 | 7 | 8,722 | Bryan Clark | Ken Forsch | Ken Forsch | Bryan Clark | Bruce Kison | 379 | 502 | -123 |
| 1983-08-08 | @ OAK | 112 | L 1-2 | 44-68 | 7 | 14,329 | Jim Beattie | Tim Conroy | Tim Conroy | Jim Beattie | Dave Beard | 380 | 504 | -124 |
| 1983-08-09 | @ OAK | 113 | L 6-7 | 44-69 | 7 | 6,848 | Glenn Abbott | Steve McCatty | Tom Underwood | Bob Stoddard | Dave Beard | 386 | 511 | -125 |
| 1983-08-10 | @ OAK | 114 | W 7-5 | 45-69 | 7 | 13,780 | Matt Young | Gorman Heimueller | Matt Young | Gorman Heimueller | Ed Vande Berg | 393 | 516 | -123 |
| 1983-08-12 | @ CAL | 115 | W 7-6 | 46-69 | 7 | 37,552 | Mike Moore | Mike Witt | Mike Stanton | Luis Sanchez | Bill Caudill | 400 | 522 | -122 |
| 1983-08-13 | @ CAL | 116 | L 5-10 | 46-70 | 7 | 29,702 | Bryan Clark | Ken Forsch | Ken Forsch | Bob Stoddard | John Curtis | 405 | 532 | -127 |
| 1983-08-14 | @ CAL | 117 | L 2-7 | 46-71 | 7 | 23,754 | Jim Beattie | Tommy John | Tommy John | Jim Beattie | | 407 | 539 | -132 |
| 1983-08-15 | vs MIN | 118 | L 4-7 | 46-72 | 7 | 6,005 | Glenn Abbott | Frank Viola | Frank Viola | Bryan Clark | Ron Davis | 411 | 546 | -135 |
| 1983-08-16 | vs MIN | 119 | L 1-5 | 46-73 | 7 | 6,891 | Matt Young | Ken Schrom | Ken Schrom | Matt Young | Ron Davis | 412 | 551 | -139 |
| 1983-08-17 | vs MIN | 120 | L 4-7 | 46-74 | 7 | 5,473 | Mike Moore | Albert Williams | Albert Williams | Mike Moore | Mike Walters | 416 | 558 | -142 |
| 1983-08-19 | @ CLE | 121 | L 5-6 | 46-75 | 7 | 6,639 | Bryan Clark | Neal Heaton | Neal Heaton | Karl Best | Jamie Easterly | 421 | 564 | -143 |
| 1983-08-20 | @ CLE | 122 | L 2-3 | 46-76 | 7 | 6,001 | Jim Beattie | Lary Sorensen | Jamie Easterly | Jim Beattie | | 423 | 567 | -144 |
| 1983-08-21 | @ CLE | 123 | W 7-2 | 47-76 | 7 | 10,259 | Glenn Abbott | Mike Jeffcoat | Glenn Abbott | Mike Jeffcoat | Mike Stanton | 430 | 569 | -139 |
| 1983-08-22 | @ MIL | 124 | L 2-3 | 47-77 | 7 | 22,244 | Matt Young | Chuck Porter | Chuck Porter | Bob Stoddard | | 432 | 572 | -140 |
| 1983-08-23 | @ MIL | 125 | W 5-0 | 48-77 | 7 | 23,148 | Mike Moore | Mike Caldwell | Mike Moore | Mike Caldwell | | 437 | 572 | -135 |
| 1983-08-24 | @ NYA | 126 | L 3-6 | 48-78 | 7 | 25,247 | Bryan Clark | Ron Guidry | Ron Guidry | Bryan Clark | | 440 | 578 | -138 |
| 1983-08-25 | @ NYA | 127 | L 4-7 | 48-79 | 7 | 33,854 | Jim Beattie | Shane Rawley | Shane Rawley | Jim Beattie | | 444 | 585 | -141 |
| 1983-08-26 | vs CLE | 128 | L 1-4 | 48-80 | 7 | 5,581 | Bob Stoddard | Rick Sutcliffe | Rick Sutcliffe | Bob Stoddard | | 445 | 589 | -144 |
| 1983-08-27 | vs CLE | 129 | W 6-3 | 49-80 | 7 | 7,409 | Matt Young | Juan Eichelberger | Matt Young | Juan Eichelberger | Mike Stanton | 451 | 592 | -141 |
| 1983-08-28 | vs CLE | 130 | L 2-5 | 49-81 | 7 | 7,474 | Mike Moore | Lary Sorensen | Lary Sorensen | Mike Moore | | 453 | 597 | -144 |
| 1983-08-29 | vs MIL | 131 | W 2-1 | 50-81 | 7 | 6,120 | Bryan Clark | Don Sutton | Bryan Clark | Don Sutton | | 455 | 598 | -143 |
| 1983-08-30 | vs MIL | 132 | L 2-3 | 50-82 | 7 | 15,218 | Jim Beattie | Tom Candiotti | Tom Candiotti | Jim Beattie | Pete Ladd | 457 | 601 | -144 |
| 1983-08-31 | vs MIL | 133 | W 4-1 | 51-82 | 7 | 6,307 | Bob Stoddard | Pete Vuckovich | Bob Stoddard | Pete Vuckovich | Mike Stanton | 461 | 602 | -141 |
| 1983-09-02 | vs NYA | 134 | L 4-5 | 51-83 | 7 | 21,919 | Matt Young | Ray Fontenot | Ray Fontenot | Matt Young | Rich Gossage | 465 | 607 | -142 |
| 1983-09-03 | vs NYA | 135 | L 3-5 | 51-84 | 7 | 19,589 | Mike Moore | John Montefusco | John Montefusco | Mike Moore | George Frazier | 468 | 612 | -144 |
| 1983-09-04 | vs NYA | 136 | L 3-4 | 51-85 | 7 | 11,373 | Bryan Clark | Ron Guidry | Ron Guidry | Bryan Clark | Rich Gossage | 471 | 616 | -145 |
| 1983-09-05 | @ KCA | 137 | W 13-6 | 52-85 | 7 | 16,952 | Jim Beattie | Larry Gura | Jim Beattie | Larry Gura | | 484 | 622 | -138 |
| 1983-09-06 | @ KCA | 138 | W 3-1 | 53-85 | 7 | 14,084 | Bob Stoddard | Buddy Black | Bob Stoddard | Buddy Black | Bill Caudill | 487 | 623 | -136 |
| 1983-09-07 | @ KCA | 139 | L 2-3 | 53-86 | 7 | 15,059 | Matt Young | Paul Splittorff | Paul Splittorff | Matt Young | Dan Quisenberry | 489 | 626 | -137 |
| 1983-09-09 | vs TEX | 140 | W 6-4 | 54-86 | 7 | 4,701 | Mike Moore | Mike Smithson | Mike Moore | Mike Smithson | Mike Stanton | 495 | 630 | -135 |
| 1983-09-10 | vs TEX | 141 | W 4-2 | 55-86 | 7 | 6,309 | Bryan Clark | Danny Darwin | Bryan Clark | Danny Darwin | | 499 | 632 | -133 |
| 1983-09-11 | vs TEX | 142 | L 1-2 | 55-87 | 7 | 4,080 | Jim Beattie | Dave Stewart | Dave Stewart | Jim Beattie | Dave Tobik | 500 | 634 | -134 |
| 1983-09-13 | vs TOR | 143 | L 4-6 | 55-88 | 7 | 4,340 | Bob Stoddard | Luis Leal | Luis Leal | Bob Stoddard | Roy Lee Jackson | 504 | 640 | -136 |
| 1983-09-14 | vs TOR | 144 | L 3-4 | 55-89 | 7 | 4,800 | Matt Young | Jim Clancy | Doyle Alexander | Roy Thomas | | 507 | 644 | -137 |
| 1983-09-15 | @ CHA | 145 | L 0-12 | 55-90 | 7 | 30,378 | Mike Moore | LaMarr Hoyt | LaMarr Hoyt | Mike Moore | | 507 | 656 | -149 |
| 1983-09-16 | @ CHA | 146 | L 0-7 | 55-91 | 7 | 38,502 | Bryan Clark | Floyd Bannister | Floyd Bannister | Bryan Clark | | 507 | 663 | -156 |
| 1983-09-17 | @ CHA | 147 | L 3-4 | 55-92 | 7 | 45,646 | Jim Beattie | Jerry Koosman | Dennis Lamp | Bill Caudill | | 510 | 667 | -157 |
| 1983-09-18 | @ CHA | 148 | L 0-6 | 55-93 | 7 | 40,984 | Bob Stoddard | Richard Dotson | Richard Dotson | Bob Stoddard | | 510 | 673 | -163 |
| 1983-09-19 | @ TOR | 149 | W 9-6 | 56-93 | 7 | 10,484 | Matt Young | Jim Clancy | Matt Young | Dave Geisel | Ed Vande Berg | 519 | 679 | -160 |
| 1983-09-20 | @ TOR | 150 | L 3-7 | 56-94 | 7 | 15,657 | Mike Moore | Dave Stieb | Dave Stieb | Mike Moore | | 522 | 686 | -164 |
| 1983-09-21 | @ TOR | 151 | L 3-4 | 56-95 | 7 | 16,321 | Bryan Clark | Doyle Alexander | Doyle Alexander | Bryan Clark | | 525 | 690 | -165 |
| 1983-09-22 | @ TEX | 152 | L 2-5 | 56-96 | 7 | 8,739 | Jim Beattie | Danny Darwin | Danny Darwin | Jim Beattie | | 527 | 695 | -168 |
| 1983-09-23 | @ TEX | 153 | L 1-2 | 56-97 | 7 | 7,902 | Gene Nelson | Dave Stewart | Dave Stewart | Gene Nelson | | 528 | 697 | -169 |
| 1983-09-24 | @ TEX | 154 | W 2-0 | 57-97 | 7 | 9,790 | Mike Moore | Frank Tanana | Mike Moore | Frank Tanana | Bill Caudill | 530 | 697 | -167 |
| 1983-09-25 | @ TEX | 155 | W 2-1 | 58-97 | 7 | 5,787 | Bob Stoddard | Charlie Hough | Bob Stoddard | Charlie Hough | Bill Caudill | 532 | 698 | -166 |
| 1983-09-26 | vs KCA | 156 | L 2-6 | 58-98 | 7 | 3,864 | Bryan Clark | Paul Splittorff | Paul Splittorff | Bryan Clark | Dan Quisenberry | 534 | 704 | -170 |
| 1983-09-27 | vs KCA | 157 | W 4-0 | 59-98 | 7 | 7,956 | Jim Beattie | Larry Gura | Jim Beattie | Larry Gura | | 538 | 704 | -166 |
| 1983-09-28 | vs KCA | 158 | L 8-11 | 59-99 | 7 | 3,630 | Gene Nelson | Frank Wills | Frank Wills | Gene Nelson | | 546 | 715 | -169 |
| 1983-09-29 | vs KCA | 159 | W 5-4 | 60-99 | 7 | 3,694 | Mike Moore | Buddy Black | Mike Stanton | Buddy Black | Bill Caudill | 551 | 719 | -168 |
| 1983-09-30 | vs CHA | 160 | L 4-9 | 60-100 | 7 | 5,171 | Bryan Clark | LaMarr Hoyt | LaMarr Hoyt | Bob Stoddard | | 555 | 728 | -173 |
| 1983-10-01 | vs CHA | 161 | L 3-9 | 60-101 | 7 | 25,467 | Matt Young | Floyd Bannister | Floyd Bannister | Matt Young | Jerry Koosman | 558 | 737 | -179 |
| 1983-10-02 | vs CHA | 162 | L 0-3 | 60-102 | 7 | 4,750 | Jim Beattie | Richard Dotson | Richard Dotson | Jim Beattie | Dennis Lamp | 558 | 740 | -182 |