| 1963-04-09 | @ MIN | 1 | W 5-4 | 1-0 | 3 | 22,091 | Mudcat Grant | Camilo Pascual | Mudcat Grant | Camilo Pascual | | 5 | 4 | 1 |
| 1963-04-10 | @ MIN | 2 | L 3-5 | 1-1 | 5 | 6,996 | Sam McDowell | Jim Kaat | Jim Kaat | Sam McDowell | | 8 | 9 | -1 |
| 1963-04-11 | vs DET | 3 | L 1-6 | 1-2 | 6 | 25,812 | Dick Donovan | Don Mossi | Don Mossi | Dick Donovan | | 9 | 15 | -6 |
| 1963-04-13 | vs DET | 4 | L 1-4 | 1-3 | 8 | 3,490 | Pedro Ramos | Phil Regan | Phil Regan | Pedro Ramos | Terry Fox | 10 | 19 | -9 |
| 1963-04-14 | vs DET | 5 | W 6-0 | 2-3 | 7 | 2,869 | Mudcat Grant | Jim Bunning | Jerry Walker | Jim Bunning | | 16 | 19 | -3 |
| 1963-04-16 | vs WS2 | 6 | W 3-0 | 3-3 | 6 | 3,044 | Sam McDowell | Claude Osteen | Sam McDowell | Claude Osteen | | 19 | 19 | 0 |
| 1963-04-19 | @ BAL | 7 | L 5-8 | 3-4 | 7 | 13,548 | Pedro Ramos | Milt Pappas | Wes Stock | Ron Nischwitz | Stu Miller | 24 | 27 | -3 |
| 1963-04-20 | @ BAL | 8 | L 1-8 | 3-5 | 8 | 4,715 | Mudcat Grant | Dave McNally | Dave McNally | Mudcat Grant | | 25 | 35 | -10 |
| 1963-04-21 | @ BAL | 9 | L 0-7 | 4-6 | 7 | 0 | Sam McDowell | Steve Barber | Steve Barber | Sam McDowell | | 25 | 42 | -17 |
| 1963-04-21 | @ BAL | 10 | W 2-0 | 4-6 | 7 | 23,228 | Dick Donovan | Robin Roberts | Dick Donovan | Robin Roberts | | 27 | 42 | -15 |
| 1963-04-24 | vs BOS | 11 | W 2-0 | 5-6 | 7 | 2,879 | Gary Bell | Earl Wilson | Gary Bell | Earl Wilson | Mudcat Grant | 29 | 42 | -13 |
| 1963-04-27 | @ NYA | 12 | L 1-8 | 5-7 | 7 | 16,375 | Dick Donovan | Ralph Terry | Ralph Terry | Dick Donovan | | 30 | 50 | -20 |
| 1963-04-28 | @ NYA | 13 | L 0-5 | 5-8 | 8 | 22,346 | Mudcat Grant | Whitey Ford | Whitey Ford | Mudcat Grant | Hal Reniff | 30 | 55 | -25 |
| 1963-05-01 | @ KC1 | 14 | L 3-11 | 5-9 | 8 | 9,357 | Gary Bell | Orlando Pena | Orlando Pena | Gary Bell | | 33 | 66 | -33 |
| 1963-05-02 | @ KC1 | 15 | W 15-6 | 6-9 | 8 | 4,764 | Pedro Ramos | Dave Wickersham | Barry Latman | Dave Wickersham | | 48 | 72 | -24 |
| 1963-05-03 | @ LAA | 16 | W 2-1 | 7-9 | 6 | 9,454 | Sam McDowell | Don Lee | Gary Bell | Don Lee | Ron Nischwitz | 50 | 73 | -23 |
| 1963-05-04 | @ LAA | 17 | W 6-0 | 8-9 | 6 | 12,574 | Mudcat Grant | Ken McBride | Mudcat Grant | Ken McBride | | 56 | 73 | -17 |
| 1963-05-05 | @ LAA | 18 | W 4-3 | 9-9 | 6 | 12,852 | Dick Donovan | Bo Belinsky | Dick Donovan | Bo Belinsky | Barry Latman | 60 | 76 | -16 |
| 1963-05-07 | @ WS2 | 19 | W 7-3 | 10-9 | 5 | 6,331 | Sam McDowell | Claude Osteen | Bob Allen | Jim Coates | | 67 | 79 | -12 |
| 1963-05-08 | @ WS2 | 20 | L 3-6 | 10-10 | 6 | 7,047 | Jack Kralick | Don Rudolph | Don Rudolph | Ron Nischwitz | | 70 | 85 | -15 |
| 1963-05-09 | @ WS2 | 21 | L 0-6 | 10-11 | 6 | 8,006 | Mudcat Grant | Dave Stenhouse | Dave Stenhouse | Mudcat Grant | | 70 | 91 | -21 |
| 1963-05-10 | @ DET | 22 | L 0-14 | 10-12 | 6 | 7,985 | Gary Bell | Phil Regan | Phil Regan | Gary Bell | | 70 | 105 | -35 |
| 1963-05-11 | @ DET | 23 | W 6-5 | 11-12 | 6 | 5,540 | Dick Donovan | Hank Aguirre | Jerry Walker | Terry Fox | | 76 | 110 | -34 |
| 1963-05-12 | @ DET | 24 | W 9-3 | 12-12 | 6 | 10,117 | Sam McDowell | Don Mossi | Sam McDowell | Don Mossi | | 85 | 113 | -28 |
| 1963-05-14 | vs KC1 | 25 | L 2-5 | 12-13 | 6 | 13,408 | Jack Kralick | Ed Rakow | Ed Rakow | Jack Kralick | | 87 | 118 | -31 |
| 1963-05-15 | vs KC1 | 26 | W 1-0 | 13-13 | 6 | 3,330 | Mudcat Grant | Orlando Pena | Mudcat Grant | Orlando Pena | | 88 | 118 | -30 |
| 1963-05-16 | vs CHA | 27 | W 5-4 | 14-13 | 6 | 3,079 | Dick Donovan | John Buzhardt | Pedro Ramos | Jim Brosnan | | 93 | 122 | -29 |
| 1963-05-17 | vs MIN | 28 | L 4-11 | 14-14 | 6 | 6,905 | Gary Bell | Jim Perry | Jim Perry | Gary Bell | Ray Moore | 97 | 133 | -36 |
| 1963-05-18 | vs MIN | 29 | L 1-8 | 14-15 | 6 | 3,010 | Sam McDowell | Jim Kaat | Jim Kaat | Sam McDowell | | 98 | 141 | -43 |
| 1963-05-19 | vs MIN | 30 | W 6-4 | 15-16 | 6 | 0 | Pedro Ramos | Dick Stigman | Pedro Ramos | Dick Stigman | Bob Allen | 104 | 145 | -41 |
| 1963-05-19 | vs MIN | 31 | L 6-7 | 15-16 | 6 | 9,112 | Mudcat Grant | Jim Roland | Ray Moore | Barry Latman | Frank Sullivan | 110 | 152 | -42 |
| 1963-05-20 | vs LAA | 32 | W 7-5 | 16-16 | 6 | 2,545 | Jack Kralick | Don Lee | Jack Kralick | Don Lee | Gary Bell | 117 | 157 | -40 |
| 1963-05-22 | vs LAA | 33 | L 6-7 | 16-17 | 6 | 2,171 | Dick Donovan | Dan Osinski | Julio Navarro | Gary Bell | Dean Chance | 123 | 164 | -41 |
| 1963-05-24 | vs BAL | 34 | L 4-7 | 16-18 | 6 | 6,744 | Sam McDowell | Mike McCormick | Mike McCormick | Sam McDowell | Dave McNally | 127 | 171 | -44 |
| 1963-05-25 | vs BAL | 35 | L 4-6 | 16-19 | 7 | 2,789 | Pedro Ramos | Milt Pappas | Stu Miller | Bob Allen | | 131 | 177 | -46 |
| 1963-05-26 | vs BAL | 36 | L 6-10 | 16-21 | 7 | 0 | Dick Donovan | Steve Barber | Wes Stock | Dick Donovan | Stu Miller | 137 | 187 | -50 |
| 1963-05-26 | vs BAL | 37 | L 1-6 | 16-21 | 7 | 8,209 | Mudcat Grant | Chuck Estrada | Wes Stock | Mudcat Grant | | 138 | 193 | -55 |
| 1963-05-28 | @ CHA | 38 | W 3-2 | 17-21 | 7 | 10,595 | Jack Kralick | Ray Herbert | Jack Kralick | Ray Herbert | Ted Abernathy | 141 | 195 | -54 |
| 1963-05-30 | @ CHA | 39 | L 4-8 | 17-23 | 7 | 0 | Sam McDowell | Juan Pizarro | Eddie Fisher | Jerry Walker | Hoyt Wilhelm | 145 | 203 | -58 |
| 1963-05-30 | @ CHA | 40 | L 2-4 | 17-23 | 7 | 29,436 | Barry Latman | Gary Peters | Gary Peters | Barry Latman | Frank Baumann | 147 | 207 | -60 |
| 1963-05-31 | vs NYA | 41 | L 0-4 | 17-24 | 8 | 20,426 | Mudcat Grant | Whitey Ford | Whitey Ford | Mudcat Grant | | 147 | 211 | -64 |
| 1963-06-01 | vs NYA | 42 | L 2-5 | 17-25 | 8 | 30,729 | Dick Donovan | Jim Bouton | Jim Bouton | Dick Donovan | | 149 | 216 | -67 |
| 1963-06-02 | vs NYA | 43 | W 5-0 | 19-25 | 7 | 0 | Jack Kralick | Bill Stafford | Jack Kralick | Bill Stafford | | 154 | 216 | -62 |
| 1963-06-02 | vs NYA | 44 | W 7-2 | 19-25 | 7 | 27,557 | Sam McDowell | Stan Williams | Sam McDowell | Stan Williams | | 161 | 218 | -57 |
| 1963-06-04 | vs DET | 45 | W 6-4 | 20-25 | 7 | 5,698 | Barry Latman | Mickey Lolich | Jerry Walker | Hank Aguirre | Ted Abernathy | 167 | 222 | -55 |
| 1963-06-05 | vs DET | 46 | L 4-5 | 20-26 | 7 | 7,488 | Mudcat Grant | Jim Bunning | Jim Bunning | Mudcat Grant | Terry Fox | 171 | 227 | -56 |
| 1963-06-07 | @ WS2 | 47 | W 8-1 | 21-26 | 7 | 9,478 | Dick Donovan | Jim Duckworth | Dick Donovan | Jim Duckworth | Ted Abernathy | 179 | 228 | -49 |
| 1963-06-08 | @ WS2 | 48 | W 6-1 | 22-26 | 7 | 11,729 | Jack Kralick | Bennie Daniels | Jack Kralick | Bennie Daniels | | 185 | 229 | -44 |
| 1963-06-09 | @ WS2 | 49 | W 7-3 | 23-26 | 7 | 5,637 | Sam McDowell | Tom Cheney | Gary Bell | Tom Cheney | Ted Abernathy | 192 | 232 | -40 |
| 1963-06-10 | @ BAL | 50 | W 3-2 | 24-26 | 7 | 9,470 | Barry Latman | Mike McCormick | Barry Latman | Mike McCormick | Ted Abernathy | 195 | 234 | -39 |
| 1963-06-11 | @ BAL | 51 | W 9-5 | 25-26 | 7 | 20,193 | Mudcat Grant | Robin Roberts | Mudcat Grant | Robin Roberts | Ted Abernathy | 204 | 239 | -35 |
| 1963-06-12 | @ DET | 52 | W 12-6 | 26-26 | 7 | 12,780 | Dick Donovan | Hank Aguirre | Jerry Walker | Tom Sturdivant | | 216 | 245 | -29 |
| 1963-06-13 | @ DET | 53 | W 5-3 | 27-26 | 6 | 5,784 | Jack Kralick | Phil Regan | Jack Kralick | Phil Regan | | 221 | 248 | -27 |
| 1963-06-14 | vs WS2 | 54 | L 2-5 | 28-27 | 6 | 0 | Barry Latman | Tom Cheney | Tom Cheney | Barry Latman | Ron Kline | 223 | 253 | -30 |
| 1963-06-14 | vs WS2 | 55 | W 3-2 | 28-27 | 6 | 12,377 | Gary Bell | Claude Osteen | Jerry Walker | Jim Coates | | 226 | 255 | -29 |
| 1963-06-15 | vs WS2 | 56 | W 4-0 | 29-27 | 6 | 2,954 | Pedro Ramos | Bennie Daniels | Pedro Ramos | Bennie Daniels | Ted Abernathy | 230 | 255 | -25 |
| 1963-06-16 | vs WS2 | 57 | W 4-2 | 31-27 | 4 | 0 | Mudcat Grant | Dave Stenhouse | Ted Abernathy | Ron Kline | | 234 | 257 | -23 |
| 1963-06-16 | vs WS2 | 58 | W 6-4 | 31-27 | 4 | 15,347 | Dick Donovan | Don Rudolph | Dick Donovan | Jim Bronstad | | 240 | 261 | -21 |
| 1963-06-17 | vs WS2 | 59 | W 1-0 | 32-27 | 4 | 4,162 | Jack Kralick | Jim Duckworth | Jack Kralick | Jim Duckworth | | 241 | 261 | -20 |
| 1963-06-18 | vs BAL | 60 | W 7-3 | 33-27 | 4 | 6,583 | Barry Latman | Dave McNally | Barry Latman | Dave McNally | | 248 | 264 | -16 |
| 1963-06-19 | vs BAL | 61 | W 5-4 | 34-28 | 4 | 0 | Pedro Ramos | Steve Barber | Ted Abernathy | Stu Miller | | 253 | 268 | -15 |
| 1963-06-19 | vs BAL | 62 | L 2-6 | 34-28 | 4 | 13,150 | Gary Bell | Milt Pappas | Milt Pappas | Gary Bell | | 255 | 274 | -19 |
| 1963-06-20 | vs BAL | 63 | W 11-8 | 35-28 | 4 | 4,304 | Dick Donovan | Dick Hall | Jerry Walker | Dick Hall | Ted Abernathy | 266 | 282 | -16 |
| 1963-06-21 | vs CHA | 64 | L 0-2 | 35-29 | 4 | 19,177 | Early Wynn | Juan Pizarro | Juan Pizarro | Early Wynn | | 266 | 284 | -18 |
| 1963-06-22 | vs CHA | 65 | L 1-2 | 35-30 | 4 | 4,573 | Mudcat Grant | Gary Peters | Gary Peters | Mudcat Grant | Jim Brosnan | 267 | 286 | -19 |
| 1963-06-23 | vs CHA | 66 | L 1-2 | 36-31 | 4 | 0 | Jack Kralick | Ray Herbert | Ray Herbert | Jack Kralick | Hoyt Wilhelm | 268 | 288 | -20 |
| 1963-06-23 | vs CHA | 67 | W 2-0 | 36-31 | 4 | 46,019 | Barry Latman | Dave DeBusschere | Barry Latman | Dave DeBusschere | | 270 | 288 | -18 |
| 1963-06-24 | @ BOS | 68 | L 5-7 | 36-32 | 5 | 16,950 | Gary Bell | Bob Heffner | Jack Lamabe | Jerry Walker | | 275 | 295 | -20 |
| 1963-06-25 | @ BOS | 69 | L 1-4 | 36-34 | 6 | 0 | Dick Donovan | Bill Monbouquette | Bill Monbouquette | Dick Donovan | Dick Radatz | 276 | 299 | -23 |
| 1963-06-25 | @ BOS | 70 | L 2-3 | 36-34 | 6 | 18,755 | Sam McDowell | Earl Wilson | Earl Wilson | Sam McDowell | Dick Radatz | 278 | 302 | -24 |
| 1963-06-26 | @ BOS | 71 | L 5-6 | 36-35 | 5 | 11,730 | Mudcat Grant | Dave Morehead | Jack Lamabe | Pedro Ramos | | 283 | 308 | -25 |
| 1963-06-27 | @ BOS | 72 | W 6-4 | 37-35 | 5 | 6,497 | Barry Latman | Wilbur Wood | Barry Latman | Wilbur Wood | Ted Abernathy | 289 | 312 | -23 |
| 1963-06-28 | @ CHA | 73 | W 4-3 | 38-35 | 5 | 36,324 | Early Wynn | Dave DeBusschere | Ted Abernathy | Jim Brosnan | | 293 | 315 | -22 |
| 1963-06-29 | @ CHA | 74 | W 5-2 | 39-35 | 5 | 10,749 | Jack Kralick | John Buzhardt | Jack Kralick | John Buzhardt | Bob Allen | 298 | 317 | -19 |
| 1963-06-30 | @ CHA | 75 | W 8-4 | 40-36 | 5 | 0 | Dick Donovan | Juan Pizarro | Dick Donovan | Juan Pizarro | Ted Abernathy | 306 | 321 | -15 |
| 1963-06-30 | @ CHA | 76 | L 0-4 | 40-36 | 5 | 27,805 | Mudcat Grant | Gary Peters | Gary Peters | Mudcat Grant | | 306 | 325 | -19 |
| 1963-07-02 | vs BOS | 77 | L 1-6 | 40-37 | 5 | 1,433 | Barry Latman | Dave Morehead | Dave Morehead | Barry Latman | | 307 | 331 | -24 |
| 1963-07-03 | vs BOS | 78 | L 2-6 | 40-38 | 6 | 16,419 | Pedro Ramos | Bob Heffner | Dick Radatz | Bob Allen | | 309 | 337 | -28 |
| 1963-07-04 | vs BOS | 79 | W 4-3 | 42-38 | 6 | 0 | Early Wynn | Bill Monbouquette | Gary Bell | Hal Kolstad | | 313 | 340 | -27 |
| 1963-07-04 | vs BOS | 80 | W 7-5 | 42-38 | 6 | 10,102 | Mudcat Grant | Chet Nichols | Mudcat Grant | Chet Nichols | | 320 | 345 | -25 |
| 1963-07-05 | vs NYA | 81 | W 4-1 | 43-38 | 5 | 27,598 | Dick Donovan | Jim Bouton | Dick Donovan | Jim Bouton | | 324 | 346 | -22 |
| 1963-07-06 | vs NYA | 82 | L 6-11 | 43-39 | 6 | 57,621 | Barry Latman | Al Downing | Al Downing | Barry Latman | Hal Reniff | 330 | 357 | -27 |
| 1963-07-07 | vs NYA | 83 | W 11-3 | 44-40 | 6 | 0 | Jack Kralick | Ralph Terry | Jack Kralick | Ralph Terry | | 341 | 360 | -19 |
| 1963-07-07 | vs NYA | 84 | L 4-7 | 44-40 | 6 | 37,220 | Pedro Ramos | Stan Williams | Jim Bouton | Ted Abernathy | Whitey Ford | 345 | 367 | -22 |
| 1963-07-11 | @ KC1 | 85 | W 8-6 | 45-40 | 6 | 6,542 | Dick Donovan | Dave Wickersham | Mudcat Grant | Dale Willis | Ted Abernathy | 353 | 373 | -20 |
| 1963-07-13 | @ KC1 | 86 | L 5-6 | 46-41 | 6 | 0 | Jack Kralick | Diego Segui | John Wyatt | Jack Kralick | | 358 | 379 | -21 |
| 1963-07-13 | @ KC1 | 87 | W 7-4 | 46-41 | 6 | 13,565 | Early Wynn | Moe Drabowsky | Early Wynn | Moe Drabowsky | Jerry Walker | 365 | 383 | -18 |
| 1963-07-14 | @ MIN | 88 | L 3-5 | 46-43 | 6 | 0 | Pedro Ramos | Jim Kaat | Jim Kaat | Pedro Ramos | Bill Dailey | 368 | 388 | -20 |
| 1963-07-14 | @ MIN | 89 | L 2-8 | 46-43 | 6 | 32,260 | Barry Latman | Bill Pleis | Bill Pleis | Barry Latman | Garry Roggenburk | 370 | 396 | -26 |
| 1963-07-15 | @ MIN | 90 | L 1-13 | 46-44 | 6 | 11,160 | Dick Donovan | Dick Stigman | Dick Stigman | Dick Donovan | | 371 | 409 | -38 |
| 1963-07-16 | @ LAA | 91 | L 1-2 | 46-45 | 6 | 9,971 | Mudcat Grant | Ken McBride | Ken McBride | Mudcat Grant | | 372 | 411 | -39 |
| 1963-07-17 | @ LAA | 92 | L 2-7 | 46-47 | 6 | 0 | Jerry Walker | Dean Chance | Dean Chance | Jerry Walker | | 374 | 418 | -44 |
| 1963-07-17 | @ LAA | 93 | L 0-1 | 46-47 | 6 | 10,661 | Jack Kralick | Paul Foytack | Paul Foytack | Jack Kralick | Art Fowler | 374 | 419 | -45 |
| 1963-07-20 | @ NYA | 94 | L 4-5 | 46-48 | 6 | 21,931 | Dick Donovan | Whitey Ford | Whitey Ford | Dick Donovan | Hal Reniff | 378 | 424 | -46 |
| 1963-07-21 | @ NYA | 95 | L 2-5 | 46-50 | 6 | 0 | Jack Kralick | Al Downing | Al Downing | Jack Kralick | Hal Reniff | 380 | 429 | -49 |
| 1963-07-21 | @ NYA | 96 | L 4-5 | 46-50 | 6 | 30,180 | Barry Latman | Jim Bouton | Steve Hamilton | Early Wynn | | 384 | 434 | -50 |
| 1963-07-23 | vs MIN | 97 | W 3-2 | 47-50 | 6 | 7,373 | Mudcat Grant | Camilo Pascual | Mudcat Grant | Camilo Pascual | | 387 | 436 | -49 |
| 1963-07-24 | vs MIN | 98 | L 0-9 | 47-52 | 6 | 0 | Pedro Ramos | Dick Stigman | Dick Stigman | Pedro Ramos | | 387 | 445 | -58 |
| 1963-07-24 | vs MIN | 99 | L 0-5 | 47-52 | 6 | 11,347 | Dick Donovan | Jim Kaat | Jim Kaat | Dick Donovan | | 387 | 450 | -63 |
| 1963-07-25 | vs MIN | 100 | W 3-2 | 48-52 | 6 | 3,296 | Barry Latman | Jim Perry | Gary Bell | Bill Dailey | | 390 | 452 | -62 |
| 1963-07-26 | vs KC1 | 101 | W 3-2 | 49-52 | 6 | 9,091 | Jack Kralick | Moe Drabowsky | Jack Kralick | Moe Drabowsky | | 393 | 454 | -61 |
| 1963-07-27 | vs KC1 | 102 | W 3-2 | 50-52 | 6 | 3,582 | Early Wynn | Diego Segui | Pedro Ramos | Diego Segui | | 396 | 456 | -60 |
| 1963-07-28 | vs KC1 | 103 | L 0-3 | 51-53 | 6 | 0 | Jerry Walker | Orlando Pena | Orlando Pena | Jerry Walker | | 396 | 459 | -63 |
| 1963-07-28 | vs KC1 | 104 | W 12-7 | 51-53 | 6 | 11,553 | Mudcat Grant | Bill Fischer | Ted Abernathy | Tom Sturdivant | Barry Latman | 408 | 466 | -58 |
| 1963-07-29 | vs LAA | 105 | L 0-11 | 51-54 | 6 | 5,223 | Dick Donovan | Dean Chance | Dean Chance | Dick Donovan | | 408 | 477 | -69 |
| 1963-07-30 | vs LAA | 106 | L 4-6 | 51-55 | 6 | 4,425 | Jack Kralick | Ken McBride | Jack Spring | Ted Abernathy | | 412 | 483 | -71 |
| 1963-07-31 | vs LAA | 107 | W 1-0 | 53-55 | 6 | 0 | Barry Latman | Fred Newman | Barry Latman | Fred Newman | | 413 | 483 | -70 |
| 1963-07-31 | vs LAA | 108 | W 9-5 | 53-55 | 6 | 7,288 | Pedro Ramos | Eli Grba | Pedro Ramos | Eli Grba | Gary Bell | 422 | 488 | -66 |
| 1963-08-02 | @ DET | 109 | L 9-10 | 53-56 | 6 | 18,525 | Mudcat Grant | Jim Bunning | Jim Bunning | Mudcat Grant | Terry Fox | 431 | 498 | -67 |
| 1963-08-03 | @ DET | 110 | L 5-7 | 53-57 | 6 | 8,926 | Dick Donovan | Phil Regan | Phil Regan | Dick Donovan | Terry Fox | 436 | 505 | -69 |
| 1963-08-04 | @ DET | 111 | L 0-2 | 54-58 | 6 | 0 | Jack Kralick | Hank Aguirre | Hank Aguirre | Jack Kralick | | 436 | 507 | -71 |
| 1963-08-04 | @ DET | 112 | W 3-2 | 54-58 | 6 | 20,945 | Pedro Ramos | Mickey Lolich | Ted Abernathy | Fred Gladding | Gary Bell | 439 | 509 | -70 |
| 1963-08-06 | @ BAL | 113 | L 4-6 | 54-59 | 6 | 16,448 | Barry Latman | Robin Roberts | Robin Roberts | Barry Latman | Stu Miller | 443 | 515 | -72 |
| 1963-08-07 | @ BAL | 114 | W 4-1 | 55-59 | 6 | 7,080 | Mudcat Grant | Milt Pappas | Mudcat Grant | Milt Pappas | | 447 | 516 | -69 |
| 1963-08-08 | @ BAL | 115 | W 2-0 | 56-59 | 5 | 7,738 | Dick Donovan | Steve Barber | Dick Donovan | Steve Barber | | 449 | 516 | -67 |
| 1963-08-09 | vs KC1 | 116 | L 1-5 | 56-60 | 5 | 8,603 | Jack Kralick | Moe Drabowsky | Moe Drabowsky | Jack Kralick | | 450 | 521 | -71 |
| 1963-08-10 | vs KC1 | 117 | L 3-6 | 56-61 | 5 | 6,544 | Pedro Ramos | Diego Segui | Diego Segui | Pedro Ramos | | 453 | 527 | -74 |
| 1963-08-11 | vs KC1 | 118 | W 2-1 | 57-61 | 5 | 5,728 | Barry Latman | Orlando Pena | Barry Latman | Orlando Pena | | 455 | 528 | -73 |
| 1963-08-13 | @ CHA | 119 | L 0-3 | 57-62 | 5 | 17,902 | Mudcat Grant | Dave DeBusschere | Dave DeBusschere | Mudcat Grant | | 455 | 531 | -76 |
| 1963-08-14 | @ CHA | 120 | W 1-0 | 58-62 | 6 | 23,220 | Dick Donovan | Ray Herbert | Dick Donovan | Ray Herbert | | 456 | 531 | -75 |
| 1963-08-16 | @ BOS | 121 | L 4-7 | 58-63 | 6 | 16,301 | Jack Kralick | Bob Heffner | Bob Heffner | Jack Kralick | Dick Radatz | 460 | 538 | -78 |
| 1963-08-17 | @ BOS | 122 | L 3-10 | 58-64 | 6 | 9,325 | Barry Latman | Bill Monbouquette | Bill Monbouquette | Barry Latman | | 463 | 548 | -85 |
| 1963-08-18 | @ BOS | 123 | W 7-4 | 59-64 | 6 | 14,572 | Mudcat Grant | Dave Morehead | Mudcat Grant | Dave Morehead | | 470 | 552 | -82 |
| 1963-08-19 | @ BOS | 124 | W 8-3 | 60-64 | 5 | 11,493 | Pedro Ramos | Arnold Earley | Pedro Ramos | Arnold Earley | | 478 | 555 | -77 |
| 1963-08-20 | @ NYA | 125 | W 2-1 | 61-64 | 5 | 20,356 | Dick Donovan | Whitey Ford | Dick Donovan | Whitey Ford | | 480 | 556 | -76 |
| 1963-08-21 | @ NYA | 126 | L 1-3 | 61-66 | 5 | 0 | Jack Kralick | Al Downing | Al Downing | Jack Kralick | | 481 | 559 | -78 |
| 1963-08-21 | @ NYA | 127 | L 1-3 | 61-66 | 5 | 25,983 | Barry Latman | Stan Williams | Stan Williams | Barry Latman | | 482 | 562 | -80 |
| 1963-08-22 | @ NYA | 128 | W 7-4 | 62-66 | 5 | 21,293 | Mudcat Grant | Ralph Terry | Mudcat Grant | Ralph Terry | Gary Bell | 489 | 566 | -77 |
| 1963-08-23 | vs BOS | 129 | L 2-3 | 62-67 | 6 | 9,739 | Pedro Ramos | Earl Wilson | Dick Radatz | Pedro Ramos | | 491 | 569 | -78 |
| 1963-08-24 | vs BOS | 130 | W 6-2 | 63-67 | 5 | 3,171 | Dick Donovan | Bob Turley | Dick Donovan | Bob Turley | | 497 | 571 | -74 |
| 1963-08-25 | vs BOS | 131 | L 3-8 | 64-68 | 5 | 0 | Barry Latman | Bill Monbouquette | Bill Monbouquette | Barry Latman | | 500 | 579 | -79 |
| 1963-08-25 | vs BOS | 132 | W 2-1 | 64-68 | 5 | 9,555 | Jack Kralick | Bob Heffner | Ted Abernathy | Dick Radatz | | 502 | 580 | -78 |
| 1963-08-27 | vs CHA | 133 | L 1-6 | 64-69 | 6 | 8,404 | Mudcat Grant | Joe Horlen | Joe Horlen | Mudcat Grant | Hoyt Wilhelm | 503 | 586 | -83 |
| 1963-08-28 | vs CHA | 134 | L 3-8 | 64-71 | 6 | 0 | Pedro Ramos | Juan Pizarro | Juan Pizarro | Pedro Ramos | | 506 | 594 | -88 |
| 1963-08-28 | vs CHA | 135 | L 1-3 | 64-71 | 6 | 7,777 | Dick Donovan | Eddie Fisher | Eddie Fisher | Dick Donovan | Jim Brosnan | 507 | 597 | -90 |
| 1963-08-29 | vs CHA | 136 | L 2-7 | 64-72 | 7 | 4,132 | Barry Latman | Gary Peters | Gary Peters | Barry Latman | | 509 | 604 | -95 |
| 1963-08-30 | vs DET | 137 | W 5-4 | 65-72 | 6 | 6,631 | Jack Kralick | Jim Bunning | Gary Bell | Terry Fox | | 514 | 608 | -94 |
| 1963-08-31 | vs DET | 138 | L 8-9 | 65-73 | 7 | 3,457 | Mudcat Grant | Phil Regan | Fred Gladding | Jerry Walker | | 522 | 617 | -95 |
| 1963-09-01 | vs DET | 139 | W 6-3 | 67-73 | 6 | 0 | Dick Donovan | Don Mossi | Dick Donovan | Don Mossi | Gary Bell | 528 | 620 | -92 |
| 1963-09-01 | vs DET | 140 | W 3-1 | 67-73 | 6 | 8,706 | Pedro Ramos | Mickey Lolich | Pedro Ramos | Mickey Lolich | Early Wynn | 531 | 621 | -90 |
| 1963-09-02 | vs WS2 | 141 | W 15-3 | 68-74 | 7 | 0 | Jack Kralick | Don Rudolph | Jack Kralick | Don Rudolph | | 546 | 624 | -78 |
| 1963-09-02 | vs WS2 | 142 | L 7-8 | 68-74 | 7 | 4,858 | Barry Latman | Ed Hobaugh | Ed Roebuck | Barry Latman | Ron Kline | 553 | 632 | -79 |
| 1963-09-04 | vs BAL | 143 | L 5-6 | 68-75 | 7 | 2,648 | Mudcat Grant | Robin Roberts | Robin Roberts | Mudcat Grant | Stu Miller | 558 | 638 | -80 |
| 1963-09-06 | @ WS2 | 144 | L 2-7 | 68-76 | 6 | 12,054 | Dick Donovan | Bennie Daniels | Bennie Daniels | Dick Donovan | | 560 | 645 | -85 |
| 1963-09-07 | @ WS2 | 145 | W 9-2 | 69-76 | 6 | 2,758 | Pedro Ramos | Don Rudolph | Pedro Ramos | Don Rudolph | | 569 | 647 | -78 |
| 1963-09-08 | @ WS2 | 146 | W 6-2 | 70-76 | 6 | 3,541 | Jack Kralick | Jim Duckworth | Jack Kralick | Jim Duckworth | | 575 | 649 | -74 |
| 1963-09-09 | @ MIN | 147 | L 4-7 | 70-77 | 7 | 8,838 | Mudcat Grant | Jim Perry | Bill Pleis | Mudcat Grant | Garry Roggenburk | 579 | 656 | -77 |
| 1963-09-10 | @ MIN | 148 | L 4-5 | 70-78 | 7 | 10,584 | Barry Latman | Jim Kaat | Gerry Arrigo | Jerry Walker | | 583 | 661 | -78 |
| 1963-09-11 | @ MIN | 149 | L 3-9 | 70-79 | 7 | 8,749 | Dick Donovan | Lee Stange | Lee Stange | Dick Donovan | | 586 | 670 | -84 |
| 1963-09-12 | @ MIN | 150 | L 2-3 | 70-80 | 7 | 6,100 | Pedro Ramos | Dwight Siebler | Bill Dailey | Pedro Ramos | | 588 | 673 | -85 |
| 1963-09-13 | @ LAA | 151 | W 7-6 | 71-80 | 7 | 7,363 | Jack Kralick | Fred Newman | Gary Bell | Dan Osinski | | 595 | 679 | -84 |
| 1963-09-14 | @ LAA | 152 | L 3-4 | 71-81 | 7 | 3,365 | Tommy John | Dean Chance | Dean Chance | Tommy John | Jack Spring | 598 | 683 | -85 |
| 1963-09-15 | @ LAA | 153 | W 6-3 | 72-81 | 7 | 9,710 | Mudcat Grant | Bo Belinsky | Mudcat Grant | Bo Belinsky | | 604 | 686 | -82 |
| 1963-09-17 | vs NYA | 154 | W 3-2 | 73-81 | 7 | 7,269 | Pedro Ramos | Al Downing | Ted Abernathy | Stan Williams | | 607 | 688 | -81 |
| 1963-09-21 | vs LAA | 155 | L 2-4 | 73-82 | 7 | 1,617 | Tommy John | Dean Chance | Dean Chance | Tommy John | Bob Duliba | 609 | 692 | -83 |
| 1963-09-22 | vs LAA | 156 | W 5-3 | 75-82 | 6 | 0 | Jack Kralick | Don Lee | Jack Kralick | Don Lee | | 614 | 695 | -81 |
| 1963-09-22 | vs LAA | 157 | W 2-1 | 75-82 | 6 | 4,539 | Pedro Ramos | Mike Lee | Pedro Ramos | Bob Duliba | | 616 | 696 | -80 |
| 1963-09-24 | vs MIN | 158 | W 5-1 | 76-82 | 6 | 2,472 | Mudcat Grant | Dick Stigman | Mudcat Grant | Dick Stigman | | 621 | 697 | -76 |
| 1963-09-26 | @ KC1 | 159 | W 4-1 | 77-82 | 6 | 2,433 | Tommy John | Moe Drabowsky | Gary Bell | Moe Drabowsky | Ted Abernathy | 625 | 698 | -73 |
| 1963-09-27 | @ KC1 | 160 | L 1-3 | 77-83 | 6 | 3,131 | Gordon Seyfried | Dave Wickersham | Dave Wickersham | Gordon Seyfried | | 626 | 701 | -75 |
| 1963-09-28 | @ KC1 | 161 | W 7-0 | 78-83 | 6 | 3,487 | Jack Kralick | Fred Norman | Jack Kralick | Fred Norman | | 633 | 701 | -68 |
| 1963-09-29 | @ KC1 | 162 | W 2-1 | 79-83 | 6 | 7,423 | Mudcat Grant | John O'Donoghue | Mudcat Grant | John O'Donoghue | | 635 | 702 | -67 |