| West | W | L | Pct | GB |
| Oakland | 104 | 58 | .642 | -- |
| Minnesota | 91 | 71 | .562 | 13.0 |
| KC Royals | 84 | 77 | .522 | 19.5 |
| California | 75 | 87 | .463 | 29.0 |
| Chi White Sox | 71 | 90 | .441 | 32.5 |
| Texas | 70 | 91 | .435 | 33.5 |
| Seattle | 68 | 93 | .422 | 35.5 |
| Date | Pitcher | Hand | Age | Game Result | Opp | GS# | Career | Dec | IP | H | R | ER | HR | BB | SO | Pit | Bal | Str | Str% | W-L | ERA | WHIP |
| 1988-04-04 | Bret Saberhagen | R | 24 | W 3-5 | vs TOR | 1 | 109 | L | 8.0 | 7 | 5 | 3 | 3 | 0 | 7 | 108 | 35 | 73 | 68% | 0-1 | 3.38 | 0.88 |
| 1988-04-06 | Charlie Leibrandt | L | 32 | W 4-11 | vs TOR | 1 | 168 | L | 3.0 | 7 | 6 | 6 | 0 | 2 | 3 | 60 | 23 | 37 | 62% | 0-1 | 18.00 | 3.00 |
| 1988-04-07 | Mark Gubicza | R | 26 | L 7-4 | vs TOR | 1 | 117 | W | 6.0 | 5 | 3 | 3 | 1 | 4 | 2 | 112 | 57 | 55 | 49% | 1-0 | 4.50 | 1.50 |
| 1988-04-08 | Floyd Bannister | L | 33 | L 3-2 | vs DET | 1 | 319 | W | 7.0 | 2 | 2 | 2 | 0 | 4 | 3 | 98 | 42 | 56 | 57% | 1-0 | 2.57 | 0.86 |
| 1988-04-09 | Bret Saberhagen | R | 24 | W 4-11 | vs DET | 2 | 110 | - | 6.1 | 11 | 3 | 3 | 0 | 1 | 5 | 114 | 42 | 72 | 63% | 0-1 | 3.86 | 1.36 |
| 1988-04-10 | Charlie Leibrandt | L | 32 | L 8-1 | vs DET | 2 | 169 | W | 8.0 | 7 | 1 | 1 | 0 | 4 | 4 | 124 | 50 | 74 | 60% | 1-1 | 5.73 | 1.82 |
| 1988-04-12 | Mark Gubicza | R | 26 | W 6-1 | @ BAL | 2 | 118 | W | 7.0 | 2 | 1 | 0 | 0 | 5 | 6 | 118 | 57 | 61 | 52% | 2-0 | 2.08 | 1.23 |
| 1988-04-13 | Floyd Bannister | L | 33 | W 9-3 | @ BAL | 2 | 320 | W | 6.0 | 2 | 2 | 1 | 0 | 3 | 5 | 104 | 39 | 65 | 63% | 2-0 | 2.08 | 0.85 |
| 1988-04-14 | Bret Saberhagen | R | 24 | W 4-3 | @ BAL | 3 | 111 | W | 8.0 | 7 | 3 | 2 | 1 | 0 | 5 | 112 | 43 | 69 | 62% | 1-1 | 3.27 | 1.18 |
| 1988-04-16 | Charlie Leibrandt | L | 32 | L 2-4 | @ DET | 3 | 170 | L | 7.1 | 5 | 4 | 3 | 1 | 5 | 3 | 124 | 53 | 71 | 57% | 1-2 | 5.00 | 1.67 |
| 1988-04-17 | Mark Gubicza | R | 26 | L 6-8 | @ DET | 3 | 119 | L | 4.0 | 7 | 5 | 5 | 0 | 2 | 2 | 85 | 36 | 49 | 58% | 2-1 | 4.24 | 1.47 |
| 1988-04-18 | Floyd Bannister | L | 33 | L 2-4 | @ DET | 3 | 321 | L | 6.1 | 8 | 4 | 4 | 0 | 3 | 4 | 111 | 49 | 62 | 56% | 2-1 | 3.32 | 1.16 |
| 1988-04-19 | Bret Saberhagen | R | 24 | L 3-12 | @ TOR | 4 | 112 | L | 4.0 | 7 | 9 | 7 | 1 | 4 | 3 | 107 | 44 | 63 | 59% | 1-2 | 5.19 | 1.42 |
| 1988-04-20 | Charlie Leibrandt | L | 32 | L 0-3 | @ TOR | 4 | 171 | L | 6.0 | 9 | 3 | 1 | 0 | 2 | 1 | 112 | 38 | 74 | 66% | 1-3 | 4.13 | 1.71 |
| 1988-04-22 | Mark Gubicza | R | 26 | L 13-1 | vs BAL | 4 | 120 | W | 9.0 | 3 | 1 | 1 | 0 | 0 | 4 | 108 | 37 | 71 | 66% | 3-1 | 3.12 | 1.08 |
| 1988-04-23 | Floyd Bannister | L | 33 | L 4-3 | vs BAL | 4 | 322 | - | 5.0 | 6 | 3 | 3 | 1 | 1 | 2 | 72 | 24 | 48 | 67% | 2-1 | 3.75 | 1.21 |
| 1988-04-24 | Bret Saberhagen | R | 24 | L 3-1 | vs BAL | 5 | 113 | W | 9.0 | 6 | 1 | 1 | 1 | 1 | 4 | 120 | 38 | 82 | 68% | 2-2 | 4.11 | 1.26 |
| 1988-04-26 | Charlie Leibrandt | L | 32 | L 4-5 | @ NYA | 5 | 172 | L | 8.0 | 4 | 5 | 4 | 3 | 1 | 4 | 109 | 41 | 68 | 62% | 1-4 | 4.22 | 1.44 |
| 1988-04-27 | Mark Gubicza | R | 26 | W 3-1 | @ NYA | 5 | 121 | - | 8.0 | 9 | 1 | 1 | 0 | 3 | 3 | 112 | 47 | 65 | 58% | 3-1 | 2.65 | 1.18 |
| 1988-04-28 | Floyd Bannister | L | 33 | W 6-3 | @ NYA | 5 | 323 | W | 7.2 | 5 | 3 | 3 | 1 | 5 | 6 | 123 | 54 | 69 | 56% | 3-1 | 3.66 | 1.22 |
| 1988-04-29 | Bret Saberhagen | R | 24 | W 7-2 | @ MIL | 6 | 114 | W | 8.0 | 8 | 2 | 2 | 0 | 0 | 6 | 94 | 31 | 63 | 67% | 3-2 | 3.77 | 1.21 |
| 1988-04-30 | Charlie Leibrandt | L | 32 | L 1-4 | @ MIL | 6 | 173 | L | 5.0 | 5 | 3 | 3 | 0 | 5 | 3 | 101 | 51 | 50 | 50% | 1-5 | 4.38 | 1.51 |
| 1988-05-01 | Mark Gubicza | R | 26 | L 6-10 | @ MIL | 6 | 122 | L | 5.1 | 7 | 6 | 4 | 0 | 4 | 2 | 105 | 48 | 57 | 54% | 3-2 | 3.23 | 1.31 |
| 1988-05-02 | Floyd Bannister | L | 33 | W 2-0 | @ BOS | 6 | 324 | W | 5.2 | 6 | 0 | 0 | 0 | 3 | 0 | 80 | 32 | 48 | 60% | 4-1 | 3.08 | 1.26 |
| 1988-05-03 | Bret Saberhagen | R | 24 | W 9-3 | @ BOS | 7 | 115 | W | 7.0 | 7 | 3 | 3 | 0 | 4 | 4 | 112 | 37 | 75 | 67% | 4-2 | 3.78 | 1.26 |
| 1988-05-04 | Charlie Leibrandt | L | 32 | W 3-4 | vs NYA | 7 | 174 | - | 6.2 | 9 | 3 | 2 | 1 | 2 | 3 | 116 | 51 | 65 | 56% | 1-5 | 4.09 | 1.52 |
| 1988-05-05 | Mark Gubicza | R | 26 | W 3-5 | vs NYA | 7 | 123 | L | 6.2 | 8 | 5 | 5 | 0 | 3 | 3 | 116 | 50 | 66 | 57% | 3-3 | 3.72 | 1.35 |
| 1988-05-06 | Floyd Bannister | L | 33 | W 0-4 | vs MIL | 7 | 325 | L | 8.0 | 7 | 4 | 3 | 0 | 3 | 5 | 114 | 42 | 72 | 63% | 4-2 | 3.13 | 1.26 |
| 1988-05-07 | Bret Saberhagen | R | 24 | W 2-4 | vs MIL | 8 | 116 | L | 9.0 | 9 | 4 | 4 | 0 | 1 | 9 | 119 | 39 | 80 | 67% | 4-3 | 3.81 | 1.24 |
| 1988-05-08 | Charlie Leibrandt | L | 32 | W 2-6 | vs MIL | 8 | 175 | - | 9.0 | 4 | 2 | 2 | 1 | 2 | 6 | 114 | 43 | 71 | 62% | 1-5 | 3.74 | 1.38 |
| 1988-05-09 | Mark Gubicza | R | 26 | W 0-2 | vs BOS | 8 | 124 | L | 8.1 | 7 | 2 | 1 | 0 | 3 | 3 | 135 | 55 | 80 | 59% | 3-4 | 3.33 | 1.33 |
| 1988-05-10 | Floyd Bannister | L | 33 | L 7-2 | vs BOS | 8 | 326 | W | 7.0 | 7 | 2 | 2 | 0 | 2 | 5 | 103 | 40 | 63 | 61% | 5-2 | 3.06 | 1.26 |
| 1988-05-13 | Bret Saberhagen | R | 24 | L 1-2 | @ TEX | 9 | 117 | L | 8.0 | 6 | 2 | 2 | 0 | 1 | 6 | 95 | 33 | 62 | 65% | 4-4 | 3.63 | 1.19 |
| 1988-05-14 | Charlie Leibrandt | L | 32 | L 3-6 | @ TEX | 9 | 176 | L | 3.0 | 10 | 6 | 6 | 1 | 1 | 0 | 71 | 30 | 41 | 58% | 1-6 | 4.50 | 1.50 |
| 1988-05-15 | Mark Gubicza | R | 26 | W 5-4 | @ TEX | 9 | 125 | W | 6.0 | 11 | 4 | 4 | 1 | 2 | 5 | 107 | 44 | 63 | 59% | 4-4 | 3.60 | 1.42 |
| 1988-05-16 | Floyd Bannister | L | 33 | W 7-6 | @ TEX | 9 | 327 | W | 8.0 | 5 | 2 | 2 | 1 | 1 | 6 | 111 | 39 | 72 | 65% | 6-2 | 2.95 | 1.20 |
| 1988-05-17 | Ted Power | R | 33 | L 5-6 | @ MIN | 1 | 57 | - | 6.1 | 7 | 4 | 4 | 0 | 3 | 5 | 119 | 51 | 68 | 57% | 1-1 | 6.35 | 1.47 |
| 1988-05-18 | Bret Saberhagen | R | 24 | W 8-2 | @ MIN | 10 | 118 | W | 9.0 | 8 | 2 | 2 | 0 | 4 | 4 | 129 | 46 | 83 | 64% | 5-4 | 3.43 | 1.21 |
| 1988-05-19 | Charlie Leibrandt | L | 32 | W 14-1 | @ MIN | 10 | 177 | W | 6.0 | 3 | 1 | 1 | 0 | 1 | 3 | 83 | 35 | 48 | 58% | 2-6 | 4.21 | 1.42 |
| 1988-05-20 | Mark Gubicza | R | 26 | L 4-3 | vs CLE | 10 | 126 | W | 8.0 | 8 | 3 | 3 | 1 | 2 | 4 | 134 | 56 | 78 | 58% | 5-4 | 3.57 | 1.40 |
| 1988-05-21 | Floyd Bannister | L | 33 | W 5-9 | vs CLE | 10 | 328 | L | 7.0 | 8 | 8 | 8 | 3 | 4 | 1 | 110 | 40 | 70 | 64% | 6-3 | 3.71 | 1.25 |
| 1988-05-22 | Ted Power | R | 33 | W 7-8 | vs CLE | 2 | 58 | - | 5.0 | 7 | 3 | 3 | 0 | 2 | 0 | 62 | 25 | 37 | 60% | 1-1 | 6.14 | 1.55 |
| 1988-05-23 | Bret Saberhagen | R | 24 | W 5-7 | vs MIN | 11 | 119 | L | 8.1 | 11 | 7 | 7 | 1 | 1 | 3 | 127 | 44 | 83 | 65% | 5-5 | 3.81 | 1.22 |
| 1988-05-24 | Charlie Leibrandt | L | 32 | W 5-6 | vs MIN | 11 | 178 | L | 4.2 | 12 | 6 | 6 | 0 | 2 | 1 | 75 | 29 | 46 | 61% | 2-7 | 4.70 | 1.52 |
| 1988-05-25 | Mark Gubicza | R | 26 | W 2-4 | vs MIN | 11 | 127 | L | 8.0 | 13 | 4 | 3 | 0 | 1 | 4 | 125 | 47 | 78 | 62% | 5-5 | 3.55 | 1.43 |
| 1988-05-27 | Floyd Bannister | L | 33 | W 2-3 | vs TEX | 11 | 329 | L | 6.1 | 6 | 3 | 3 | 0 | 3 | 6 | 125 | 45 | 80 | 64% | 6-4 | 3.77 | 1.27 |
| 1988-05-28 | Ted Power | R | 33 | L 8-6 | vs TEX | 3 | 59 | - | 2.2 | 7 | 4 | 3 | 2 | 0 | 1 | 55 | 16 | 39 | 71% | 1-1 | 6.48 | 1.64 |
| 1988-05-29 | Bret Saberhagen | R | 24 | L 12-1 | vs TEX | 12 | 120 | W | 7.0 | 4 | 1 | 1 | 0 | 2 | 6 | 96 | 35 | 61 | 64% | 6-5 | 3.62 | 1.20 |
| 1988-05-30 | Charlie Leibrandt | L | 32 | L 1-4 | @ CLE | 12 | 179 | L | 6.2 | 9 | 4 | 4 | 1 | 0 | 6 | 112 | 43 | 69 | 62% | 2-8 | 4.81 | 1.52 |
| 1988-05-31 | Mark Gubicza | R | 26 | W 6-3 | @ CLE | 12 | 128 | W | 9.0 | 9 | 3 | 3 | 1 | 3 | 8 | 140 | 59 | 81 | 58% | 6-5 | 3.49 | 1.42 |
| 1988-06-01 | Floyd Bannister | L | 33 | L 4-5 | @ CLE | 12 | 330 | L | 4.1 | 4 | 4 | 4 | 2 | 3 | 1 | 68 | 34 | 34 | 50% | 6-5 | 4.04 | 1.29 |
| 1988-06-02 | Ted Power | R | 33 | L 3-0 | vs SEA | 4 | 60 | W | 9.0 | 4 | 0 | 0 | 0 | 1 | 5 | 96 | 32 | 64 | 67% | 2-1 | 4.76 | 1.35 |
| 1988-06-03 | Bret Saberhagen | R | 24 | L 3-1 | vs SEA | 13 | 121 | W | 9.0 | 6 | 1 | 1 | 0 | 2 | 2 | 104 | 40 | 64 | 62% | 7-5 | 3.39 | 1.17 |
| 1988-06-04 | Charlie Leibrandt | L | 32 | L 4-3 | vs SEA | 13 | 180 | - | 7.1 | 10 | 3 | 3 | 0 | 0 | 5 | 105 | 38 | 67 | 64% | 2-8 | 4.67 | 1.49 |
| 1988-06-05 | Mark Gubicza | R | 26 | L 7-3 | vs SEA | 13 | 129 | W | 7.0 | 8 | 2 | 1 | 0 | 3 | 6 | 112 | 47 | 65 | 58% | 7-5 | 3.33 | 1.43 |
| 1988-06-06 | Steve Farr | R | 31 | L 2-0 | vs OAK | 1 | 20 | W | 6.0 | 6 | 0 | 0 | 0 | 2 | 4 | 86 | 27 | 59 | 69% | 2-0 | 2.13 | 1.05 |
| 1988-06-07 | Ted Power | R | 33 | L 6-0 | vs OAK | 5 | 61 | W | 9.0 | 9 | 0 | 0 | 0 | 5 | 4 | 137 | 55 | 82 | 60% | 3-1 | 3.77 | 1.40 |
| 1988-06-08 | Bret Saberhagen | R | 24 | L 5-4 | vs OAK | 14 | 122 | W | 7.1 | 11 | 4 | 4 | 0 | 0 | 3 | 119 | 37 | 82 | 69% | 8-5 | 3.50 | 1.19 |
| 1988-06-10 | Charlie Leibrandt | L | 32 | L 0-1 | @ CAL | 14 | 181 | L | 7.2 | 6 | 1 | 1 | 0 | 2 | 4 | 125 | 52 | 73 | 58% | 2-9 | 4.40 | 1.47 |
| 1988-06-11 | Mark Gubicza | R | 26 | W 7-0 | @ CAL | 14 | 130 | W | 9.0 | 2 | 0 | 0 | 0 | 1 | 9 | 123 | 48 | 75 | 61% | 8-5 | 3.03 | 1.34 |
| 1988-06-12 | Ted Power | R | 33 | W 6-4 | @ CAL | 6 | 62 | W | 8.0 | 4 | 2 | 2 | 1 | 0 | 7 | 106 | 31 | 75 | 71% | 4-1 | 3.53 | 1.25 |
| 1988-06-13 | Floyd Bannister | L | 33 | W 5-3 | @ CAL | 13 | 331 | W | 5.0 | 5 | 3 | 3 | 1 | 0 | 3 | 92 | 27 | 65 | 71% | 7-5 | 4.12 | 1.28 |
| 1988-06-14 | Bret Saberhagen | R | 24 | W 2-1 | @ OAK | 15 | 123 | W | 8.0 | 5 | 1 | 0 | 0 | 2 | 6 | 114 | 41 | 73 | 64% | 9-5 | 3.26 | 1.17 |
| 1988-06-15 | Charlie Leibrandt | L | 32 | W 2-0 | @ OAK | 15 | 182 | W | 9.0 | 2 | 0 | 0 | 0 | 1 | 4 | 95 | 30 | 65 | 68% | 3-9 | 3.99 | 1.36 |
| 1988-06-16 | Mark Gubicza | R | 26 | W 9-5 | @ OAK | 15 | 131 | W | 8.0 | 6 | 4 | 1 | 0 | 3 | 5 | 116 | 53 | 63 | 54% | 9-5 | 2.89 | 1.32 |
| 1988-06-17 | Ted Power | R | 33 | W 7-9 | vs CAL | 7 | 63 | - | 2.1 | 8 | 5 | 5 | 0 | 1 | 3 | 49 | 15 | 34 | 69% | 4-1 | 4.25 | 1.38 |
| 1988-06-18 | Floyd Bannister | L | 33 | W 3-6 | vs CAL | 14 | 332 | - | 6.0 | 7 | 3 | 2 | 0 | 3 | 2 | 87 | 33 | 54 | 62% | 7-5 | 4.04 | 1.30 |
| 1988-06-19 | Bret Saberhagen | R | 24 | W 0-5 | vs CAL | 16 | 124 | L | 8.0 | 10 | 5 | 5 | 0 | 3 | 5 | 119 | 34 | 85 | 71% | 9-6 | 3.41 | 1.20 |
| 1988-06-20 | Charlie Leibrandt | L | 32 | L 3-5 | @ CHA | 16 | 183 | - | 6.0 | 7 | 2 | 2 | 0 | 1 | 2 | 91 | 39 | 52 | 57% | 3-9 | 3.93 | 1.36 |
| 1988-06-21 | Mark Gubicza | R | 26 | W 6-2 | @ CHA | 16 | 132 | W | 6.0 | 8 | 2 | 2 | 1 | 4 | 5 | 97 | 44 | 53 | 55% | 10-5 | 2.90 | 1.36 |
| 1988-06-22 | Rick Anderson | R | 32 | L 4-5 | @ CHA | 1 | 8 | - | 7.1 | 7 | 4 | 4 | 0 | 1 | 2 | 110 | 36 | 74 | 67% | 0-0 | 5.14 | 1.14 |
| 1988-06-24 | Floyd Bannister | L | 33 | L 0-7 | @ SEA | 15 | 333 | L | 3.2 | 6 | 7 | 4 | 3 | 4 | 0 | 69 | 31 | 38 | 55% | 7-6 | 4.26 | 1.35 |
| 1988-06-25 | Bret Saberhagen | R | 24 | W 7-3 | @ SEA | 17 | 125 | W | 8.0 | 5 | 2 | 2 | 2 | 4 | 5 | 110 | 42 | 68 | 62% | 10-6 | 3.34 | 1.20 |
| 1988-06-26 | Charlie Leibrandt | L | 32 | L 0-8 | @ SEA | 17 | 184 | L | 5.2 | 7 | 4 | 4 | 3 | 1 | 1 | 94 | 40 | 54 | 57% | 3-10 | 4.05 | 1.36 |
| 1988-06-27 | Mark Gubicza | R | 26 | L 2-1 | vs CHA | 17 | 133 | W | 8.0 | 4 | 1 | 1 | 0 | 3 | 4 | 108 | 44 | 64 | 59% | 11-5 | 2.78 | 1.33 |
| 1988-06-28 | Rick Anderson | R | 32 | W 3-4 | vs CHA | 2 | 9 | - | 6.0 | 6 | 3 | 3 | 2 | 1 | 2 | 88 | 37 | 51 | 58% | 0-0 | 4.85 | 1.15 |
| 1988-06-29 | Floyd Bannister | L | 33 | L 9-8 | vs CHA | 16 | 334 | W | 6.0 | 9 | 5 | 5 | 0 | 0 | 2 | 94 | 30 | 64 | 68% | 8-6 | 4.45 | 1.36 |
| 1988-07-01 | Bret Saberhagen | R | 24 | L 8-7 | vs BOS | 18 | 126 | - | 5.0 | 8 | 7 | 7 | 0 | 1 | 5 | 90 | 27 | 63 | 70% | 10-6 | 3.68 | 1.22 |
| 1988-07-02 | Charlie Leibrandt | L | 32 | L 3-1 | vs BOS | 18 | 185 | W | 7.2 | 11 | 1 | 1 | 1 | 0 | 3 | 105 | 35 | 70 | 67% | 4-10 | 3.85 | 1.36 |
| 1988-07-03 | Mark Gubicza | R | 26 | L 3-2 | vs BOS | 18 | 134 | - | 7.0 | 6 | 2 | 2 | 1 | 2 | 5 | 92 | 38 | 54 | 59% | 11-5 | 2.77 | 1.32 |
| 1988-07-04 | Ted Power | R | 33 | W 2-9 | vs BOS | 8 | 64 | L | 2.0 | 7 | 5 | 5 | 1 | 1 | 1 | 58 | 21 | 37 | 64% | 4-2 | 4.91 | 1.47 |
| 1988-07-05 | Floyd Bannister | L | 33 | W 1-3 | vs MIL | 17 | 335 | L | 7.1 | 6 | 3 | 3 | 1 | 1 | 1 | 82 | 29 | 53 | 65% | 8-7 | 4.42 | 1.34 |
| 1988-07-06 | Bret Saberhagen | R | 24 | W 2-4 | vs MIL | 19 | 127 | L | 8.0 | 8 | 4 | 4 | 0 | 1 | 3 | 102 | 42 | 60 | 59% | 10-7 | 3.72 | 1.21 |
| 1988-07-07 | Charlie Leibrandt | L | 32 | L 7-3 | vs MIL | 19 | 186 | W | 7.0 | 8 | 1 | 1 | 0 | 0 | 2 | 96 | 37 | 59 | 61% | 5-10 | 3.70 | 1.35 |
| 1988-07-08 | Mark Gubicza | R | 26 | W 4-0 | @ NYA | 19 | 135 | W | 9.0 | 4 | 0 | 0 | 0 | 2 | 6 | 120 | 49 | 71 | 59% | 12-5 | 2.59 | 1.27 |
| 1988-07-09 | Ted Power | R | 33 | L 3-5 | @ NYA | 9 | 65 | L | 3.2 | 8 | 5 | 5 | 0 | 1 | 2 | 92 | 35 | 57 | 62% | 4-3 | 5.34 | 1.53 |
| 1988-07-10 | Floyd Bannister | L | 33 | W 5-3 | @ NYA | 18 | 336 | - | 3.2 | 6 | 3 | 3 | 0 | 3 | 1 | 71 | 32 | 39 | 55% | 8-7 | 4.50 | 1.37 |
| 1988-07-15 | Bret Saberhagen | R | 24 | L 1-3 | @ BOS | 20 | 128 | L | 6.0 | 9 | 3 | 2 | 1 | 1 | 6 | 103 | 30 | 73 | 71% | 10-8 | 3.70 | 1.23 |
| 1988-07-15 | Charlie Leibrandt | L | 32 | L 4-7 | @ BOS | 20 | 187 | L | 4.2 | 10 | 6 | 6 | 2 | 2 | 3 | 92 | 37 | 55 | 60% | 5-11 | 4.01 | 1.40 |
| 1988-07-16 | Mark Gubicza | R | 26 | L 6-7 | @ BOS | 20 | 136 | - | 5.2 | 7 | 4 | 3 | 0 | 4 | 1 | 105 | 50 | 55 | 52% | 12-5 | 2.67 | 1.30 |
| 1988-07-17 | Ted Power | R | 33 | L 8-10 | @ BOS | 10 | 66 | L | 1.1 | 5 | 7 | 7 | 1 | 3 | 1 | 42 | 18 | 24 | 57% | 4-4 | 6.30 | 1.63 |
| 1988-07-18 | Floyd Bannister | L | 33 | L 1-6 | @ MIL | 19 | 337 | L | 8.0 | 6 | 6 | 6 | 2 | 1 | 5 | 130 | 58 | 72 | 55% | 8-8 | 4.65 | 1.34 |
| 1988-07-19 | Bret Saberhagen | R | 24 | L 1-3 | @ MIL | 21 | 129 | L | 8.0 | 6 | 3 | 3 | 1 | 1 | 4 | 107 | 39 | 68 | 64% | 10-9 | 3.68 | 1.21 |
| 1988-07-20 | Charlie Leibrandt | L | 32 | W 4-0 | @ MIL | 21 | 188 | - | 8.0 | 4 | 0 | 0 | 0 | 2 | 4 | 104 | 41 | 63 | 61% | 5-11 | 3.77 | 1.36 |
| 1988-07-21 | Mark Gubicza | R | 26 | L 6-5 | vs NYA | 21 | 137 | - | 8.0 | 7 | 5 | 2 | 2 | 1 | 4 | 131 | 54 | 77 | 59% | 12-5 | 2.65 | 1.28 |
| 1988-07-22 | Ted Power | R | 33 | W 8-9 | vs NYA | 11 | 67 | - | 2.0 | 4 | 4 | 4 | 0 | 2 | 1 | 39 | 15 | 24 | 62% | 4-4 | 6.68 | 1.68 |
| 1988-07-23 | Floyd Bannister | L | 33 | L 6-5 | vs NYA | 20 | 338 | - | 3.0 | 5 | 5 | 5 | 2 | 3 | 1 | 66 | 29 | 37 | 56% | 8-8 | 4.91 | 1.37 |
| 1988-07-24 | Bret Saberhagen | R | 24 | W 8-10 | vs NYA | 22 | 130 | L | 6.0 | 11 | 10 | 8 | 1 | 3 | 2 | 104 | 40 | 64 | 62% | 10-10 | 3.98 | 1.25 |
| 1988-07-26 | Charlie Leibrandt | L | 32 | L 1-2 | @ DET | 22 | 189 | - | 9.0 | 4 | 1 | 1 | 1 | 4 | 7 | 137 | 62 | 75 | 55% | 5-11 | 3.60 | 1.33 |
| 1988-07-27 | Mark Gubicza | R | 26 | L 1-3 | @ DET | 22 | 138 | L | 7.2 | 7 | 3 | 3 | 1 | 4 | 3 | 134 | 50 | 84 | 63% | 12-6 | 2.68 | 1.29 |
| 1988-07-28 | Rick Anderson | R | 32 | L 1-7 | @ DET | 3 | 10 | L | 3.2 | 8 | 4 | 4 | 0 | 2 | 0 | 62 | 27 | 35 | 56% | 2-1 | 4.24 | 1.47 |
| 1988-07-29 | Bret Saberhagen | R | 24 | W 6-2 | @ BAL | 23 | 131 | W | 7.0 | 3 | 2 | 1 | 1 | 1 | 4 | 89 | 26 | 63 | 71% | 11-10 | 3.87 | 1.23 |
| 1988-07-30 | Israel Sanchez | L | 25 | W 8-7 | @ BAL | 1 | 1 | - | 2.0 | 5 | 3 | 3 | 0 | 4 | 1 | 62 | 30 | 32 | 52% | 0-1 | 6.75 | 2.08 |
| 1988-07-31 | Charlie Leibrandt | L | 32 | W 4-1 | @ BAL | 23 | 190 | W | 9.0 | 4 | 1 | 1 | 1 | 2 | 11 | 129 | 51 | 78 | 60% | 6-11 | 3.45 | 1.29 |
| 1988-08-01 | Mark Gubicza | R | 26 | L 5-3 | vs DET | 23 | 139 | W | 7.1 | 5 | 3 | 3 | 0 | 3 | 1 | 104 | 39 | 65 | 63% | 13-6 | 2.73 | 1.28 |
| 1988-08-02 | Floyd Bannister | L | 33 | W 0-1 | vs DET | 21 | 339 | L | 8.1 | 4 | 1 | 1 | 0 | 3 | 4 | 113 | 46 | 67 | 59% | 8-9 | 4.67 | 1.34 |
| 1988-08-03 | Bret Saberhagen | R | 24 | L 2-1 | vs DET | 24 | 132 | W | 9.0 | 4 | 1 | 1 | 0 | 1 | 7 | 123 | 39 | 84 | 68% | 12-10 | 3.73 | 1.19 |
| 1988-08-05 | Charlie Leibrandt | L | 32 | L 6-7 | @ TOR | 24 | 191 | - | 3.0 | 8 | 6 | 6 | 1 | 2 | 2 | 63 | 26 | 37 | 59% | 6-11 | 3.73 | 1.33 |
| 1988-08-06 | Mark Gubicza | R | 26 | W 11-1 | @ TOR | 24 | 140 | W | 8.0 | 3 | 1 | 1 | 1 | 2 | 10 | 134 | 50 | 84 | 63% | 14-6 | 2.66 | 1.25 |
| 1988-08-07 | Floyd Bannister | L | 33 | W 5-1 | @ TOR | 22 | 340 | W | 6.0 | 4 | 1 | 1 | 1 | 1 | 8 | 110 | 41 | 69 | 63% | 9-9 | 4.53 | 1.32 |
| 1988-08-08 | Bret Saberhagen | R | 24 | L 1-5 | @ TOR | 25 | 133 | L | 7.0 | 12 | 5 | 5 | 1 | 2 | 6 | 130 | 46 | 84 | 65% | 12-11 | 3.83 | 1.22 |
| 1988-08-09 | Luis Aquino | R | 24 | L 5-4 | vs BAL | 1 | 1 | - | 4.0 | 6 | 3 | 3 | 1 | 5 | 1 | 89 | 40 | 49 | 55% | 0-0 | 6.75 | 2.75 |
| 1988-08-10 | Charlie Leibrandt | L | 32 | L 4-3 | vs BAL | 25 | 192 | - | 7.0 | 7 | 3 | 3 | 1 | 1 | 2 | 101 | 39 | 62 | 61% | 6-11 | 3.73 | 1.32 |
| 1988-08-11 | Mark Gubicza | R | 26 | L 6-5 | vs BAL | 25 | 141 | - | 7.2 | 8 | 4 | 4 | 0 | 1 | 3 | 93 | 38 | 55 | 59% | 14-6 | 2.74 | 1.24 |
| 1988-08-12 | Floyd Bannister | L | 33 | W 2-3 | vs TOR | 23 | 341 | L | 9.0 | 6 | 3 | 3 | 0 | 3 | 10 | 130 | 51 | 79 | 61% | 9-10 | 4.44 | 1.30 |
| 1988-08-13 | Bret Saberhagen | R | 24 | W 0-2 | vs TOR | 26 | 134 | L | 9.0 | 11 | 2 | 2 | 0 | 0 | 8 | 129 | 43 | 86 | 67% | 12-12 | 3.75 | 1.22 |
| 1988-08-14 | Luis Aquino | R | 24 | L 6-0 | vs TOR | 2 | 2 | W | 9.0 | 6 | 0 | 0 | 0 | 3 | 4 | 145 | 59 | 86 | 59% | 1-0 | 2.08 | 1.54 |
| 1988-08-15 | Charlie Leibrandt | L | 32 | L 12-3 | vs TEX | 26 | 193 | W | 7.0 | 7 | 3 | 2 | 0 | 1 | 4 | 87 | 31 | 56 | 64% | 7-11 | 3.68 | 1.32 |
| 1988-08-16 | Mark Gubicza | R | 26 | W 4-5 | vs TEX | 26 | 142 | L | 8.0 | 10 | 5 | 5 | 0 | 0 | 6 | 108 | 39 | 69 | 64% | 14-7 | 2.86 | 1.24 |
| 1988-08-17 | Floyd Bannister | L | 33 | L 9-6 | vs TEX | 24 | 342 | - | 4.1 | 7 | 3 | 3 | 0 | 0 | 4 | 77 | 23 | 54 | 70% | 9-10 | 4.47 | 1.30 |
| 1988-08-19 | Bret Saberhagen | R | 24 | L 2-4 | @ CLE | 27 | 135 | L | 8.0 | 8 | 4 | 4 | 0 | 2 | 4 | 109 | 36 | 73 | 67% | 12-13 | 3.78 | 1.22 |
| 1988-08-20 | Charlie Leibrandt | L | 32 | W 4-2 | @ CLE | 27 | 194 | W | 7.0 | 8 | 2 | 1 | 1 | 3 | 6 | 124 | 56 | 68 | 55% | 8-11 | 3.59 | 1.33 |
| 1988-08-21 | Mark Gubicza | R | 26 | W 3-1 | @ CLE | 27 | 143 | W | 9.0 | 6 | 1 | 1 | 0 | 1 | 4 | 110 | 39 | 71 | 65% | 15-7 | 2.78 | 1.22 |
| 1988-08-22 | Floyd Bannister | L | 33 | L 5-9 | @ TEX | 25 | 343 | L | 4.1 | 9 | 5 | 5 | 0 | 4 | 3 | 76 | 33 | 43 | 57% | 9-11 | 4.65 | 1.35 |
| 1988-08-23 | Luis Aquino | R | 24 | W 11-7 | @ TEX | 3 | 3 | - | 2.0 | 7 | 5 | 5 | 0 | 1 | 4 | 59 | 19 | 40 | 68% | 1-0 | 4.80 | 1.87 |
| 1988-08-24 | Bret Saberhagen | R | 24 | L 4-7 | @ TEX | 28 | 136 | - | 5.1 | 8 | 3 | 1 | 0 | 1 | 2 | 72 | 27 | 45 | 63% | 12-13 | 3.73 | 1.24 |
| 1988-08-26 | Charlie Leibrandt | L | 32 | L 4-3 | vs MIN | 28 | 195 | W | 9.0 | 7 | 3 | 3 | 0 | 0 | 3 | 108 | 41 | 67 | 62% | 9-11 | 3.56 | 1.30 |
| 1988-08-27 | Mark Gubicza | R | 26 | L 4-1 | vs MIN | 28 | 144 | W | 9.0 | 6 | 1 | 1 | 0 | 3 | 14 | 142 | 59 | 83 | 58% | 16-7 | 2.70 | 1.21 |
| 1988-08-28 | Luis Aquino | R | 24 | L 12-3 | vs MIN | 4 | 4 | - | 5.0 | 4 | 1 | 0 | 0 | 2 | 0 | 81 | 40 | 41 | 51% | 1-0 | 3.60 | 1.70 |
| 1988-08-29 | Bret Saberhagen | R | 24 | L 6-3 | vs CLE | 29 | 137 | W | 8.0 | 11 | 3 | 3 | 0 | 2 | 4 | 116 | 44 | 72 | 62% | 13-13 | 3.72 | 1.25 |
| 1988-08-30 | Ted Power | R | 34 | W 1-4 | vs CLE | 12 | 68 | L | 8.0 | 7 | 2 | 2 | 0 | 2 | 5 | 110 | 41 | 69 | 63% | 5-6 | 5.96 | 1.60 |
| 1988-08-31 | Charlie Leibrandt | L | 32 | L 1-0 | vs CLE | 29 | 196 | W | 9.0 | 7 | 0 | 0 | 0 | 1 | 4 | 117 | 39 | 78 | 67% | 10-11 | 3.40 | 1.28 |
| 1988-09-01 | Mark Gubicza | R | 26 | W 5-2 | @ MIN | 29 | 145 | W | 9.0 | 9 | 2 | 2 | 0 | 0 | 8 | 126 | 45 | 81 | 64% | 17-7 | 2.67 | 1.21 |
| 1988-09-02 | Floyd Bannister | L | 33 | L 3-6 | @ MIN | 26 | 344 | L | 5.0 | 5 | 5 | 4 | 1 | 2 | 7 | 93 | 37 | 56 | 60% | 9-12 | 4.73 | 1.35 |
| 1988-09-03 | Bret Saberhagen | R | 24 | L 6-8 | @ MIN | 30 | 138 | - | 6.0 | 10 | 5 | 5 | 2 | 1 | 3 | 108 | 41 | 67 | 62% | 13-13 | 3.82 | 1.27 |
| 1988-09-04 | Luis Aquino | R | 24 | W 3-2 | @ MIN | 5 | 5 | - | 4.0 | 4 | 2 | 1 | 0 | 5 | 1 | 86 | 43 | 43 | 50% | 1-0 | 3.38 | 1.79 |
| 1988-09-05 | Charlie Leibrandt | L | 32 | W 2-4 | vs CAL | 30 | 197 | L | 8.0 | 7 | 3 | 2 | 0 | 2 | 2 | 125 | 50 | 75 | 60% | 10-12 | 3.35 | 1.27 |
| 1988-09-06 | Mark Gubicza | R | 26 | L 3-2 | vs CAL | 30 | 146 | - | 8.2 | 6 | 2 | 2 | 0 | 3 | 7 | 137 | 57 | 80 | 58% | 17-7 | 2.66 | 1.20 |
| 1988-09-07 | Floyd Bannister | L | 33 | L 4-2 | vs CAL | 27 | 345 | W | 7.0 | 8 | 1 | 0 | 0 | 1 | 1 | 104 | 50 | 54 | 52% | 10-12 | 4.53 | 1.35 |
| 1988-09-08 | Bret Saberhagen | R | 24 | W 1-5 | vs OAK | 31 | 139 | L | 6.0 | 9 | 5 | 5 | 0 | 2 | 2 | 90 | 33 | 57 | 63% | 13-14 | 3.91 | 1.28 |
| 1988-09-09 | Jose DeJesus | R | 24 | W 6-14 | vs OAK | 1 | 1 | L | 2.0 | 4 | 6 | 5 | 0 | 3 | 1 | 53 | 26 | 27 | 51% | 0-1 | 22.50 | 3.50 |
| 1988-09-10 | Charlie Leibrandt | L | 32 | L 9-4 | vs OAK | 31 | 198 | W | 8.0 | 7 | 2 | 2 | 0 | 5 | 4 | 133 | 55 | 78 | 59% | 11-12 | 3.31 | 1.28 |
| 1988-09-11 | Mark Gubicza | R | 26 | W 7-8 | vs OAK | 31 | 147 | - | 8.0 | 10 | 7 | 7 | 0 | 4 | 6 | 139 | 59 | 80 | 58% | 17-7 | 2.83 | 1.22 |
| 1988-09-13 | Bret Saberhagen | R | 24 | W 4-3 | @ CAL | 32 | 140 | W | 7.0 | 6 | 2 | 2 | 0 | 2 | 9 | 122 | 47 | 75 | 61% | 14-14 | 3.87 | 1.28 |
| 1988-09-14 | Floyd Bannister | L | 33 | W 4-2 | @ CAL | 28 | 346 | W | 7.0 | 3 | 1 | 1 | 1 | 1 | 7 | 86 | 31 | 55 | 64% | 11-12 | 4.40 | 1.32 |
| 1988-09-15 | Charlie Leibrandt | L | 32 | W 2-1 | @ CAL | 32 | 199 | W | 9.0 | 4 | 1 | 1 | 0 | 3 | 1 | 123 | 50 | 73 | 59% | 12-12 | 3.22 | 1.26 |
| 1988-09-16 | Mark Gubicza | R | 26 | W 3-0 | @ OAK | 32 | 148 | W | 9.0 | 2 | 0 | 0 | 0 | 0 | 8 | 120 | 48 | 72 | 60% | 18-7 | 2.73 | 1.18 |
| 1988-09-17 | Tom Gordon | R | 21 | L 2-3 | @ OAK | 1 | 1 | L | 6.0 | 5 | 3 | 3 | 1 | 4 | 6 | 118 | 52 | 66 | 56% | 0-1 | 3.00 | 1.11 |
| 1988-09-18 | Bret Saberhagen | R | 24 | L 2-3 | @ OAK | 33 | 141 | - | 9.0 | 3 | 2 | 2 | 1 | 2 | 9 | 121 | 42 | 79 | 65% | 14-14 | 3.80 | 1.25 |
| 1988-09-19 | Floyd Bannister | L | 33 | L 0-4 | @ SEA | 29 | 347 | L | 7.0 | 8 | 4 | 4 | 2 | 1 | 3 | 99 | 36 | 63 | 64% | 11-13 | 4.42 | 1.32 |
| 1988-09-20 | Charlie Leibrandt | L | 32 | L 10-11 | @ SEA | 33 | 200 | - | 5.2 | 12 | 7 | 4 | 0 | 1 | 6 | 114 | 46 | 68 | 60% | 12-12 | 3.29 | 1.29 |
| 1988-09-21 | Mark Gubicza | R | 26 | W 5-4 | @ SEA | 33 | 149 | W | 8.2 | 9 | 4 | 4 | 1 | 3 | 5 | 146 | 52 | 94 | 64% | 19-7 | 2.77 | 1.19 |
| 1988-09-23 | Bret Saberhagen | R | 24 | L 0-2 | @ CHA | 34 | 142 | L | 7.1 | 7 | 2 | 2 | 0 | 4 | 5 | 146 | 51 | 95 | 65% | 14-15 | 3.76 | 1.26 |
| 1988-09-24 | Floyd Bannister | L | 33 | W 6-2 | @ CHA | 30 | 348 | W | 5.2 | 6 | 1 | 1 | 0 | 1 | 4 | 90 | 34 | 56 | 62% | 12-13 | 4.33 | 1.31 |
| 1988-09-25 | Charlie Leibrandt | L | 32 | L 5-6 | @ CHA | 34 | 201 | - | 7.0 | 6 | 2 | 1 | 0 | 1 | 5 | 105 | 45 | 60 | 57% | 12-12 | 3.23 | 1.28 |
| 1988-09-26 | Mark Gubicza | R | 26 | L 5-0 | vs SEA | 34 | 150 | W | 9.0 | 3 | 0 | 0 | 0 | 1 | 10 | 109 | 39 | 70 | 64% | 20-7 | 2.68 | 1.16 |
| 1988-09-27 | Tom Gordon | R | 21 | W 3-10 | vs SEA | 2 | 2 | L | 4.1 | 8 | 6 | 6 | 0 | 3 | 4 | 73 | 28 | 45 | 62% | 0-2 | 5.06 | 1.44 |
| 1988-09-29 | Floyd Bannister | L | 33 | L 7-6 | vs CHA | 31 | 349 | - | 4.2 | 6 | 5 | 2 | 0 | 1 | 3 | 80 | 28 | 52 | 65% | 12-13 | 4.33 | 1.32 |
| 1988-09-30 | Charlie Leibrandt | L | 32 | L 4-2 | vs CHA | 35 | 202 | W | 9.0 | 7 | 2 | 2 | 1 | 0 | 3 | 111 | 37 | 74 | 67% | 13-12 | 3.19 | 1.26 |
| 1988-10-01 | Mark Gubicza | R | 26 | W 0-3 | vs CHA | 35 | 151 | L | 7.2 | 12 | 3 | 3 | 0 | 3 | 7 | 118 | 41 | 77 | 65% | 20-8 | 2.70 | 1.19 |
| 1988-10-02 | Bret Saberhagen | R | 24 | W 1-5 | vs CHA | 35 | 143 | L | 7.0 | 9 | 4 | 4 | 1 | 2 | 5 | 106 | 42 | 64 | 60% | 14-16 | 3.79 | 1.26 |