| West | W | L | Pct | GB |
| SF Giants | 92 | 70 | .568 | -- |
| San Diego | 89 | 73 | .549 | 3.0 |
| Houston | 86 | 76 | .531 | 6.0 |
| LA Dodgers | 77 | 83 | .481 | 14.0 |
| Cincinnati | 75 | 87 | .463 | 17.0 |
| Atlanta | 63 | 97 | .394 | 28.0 |
| 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 |
| 1989-04-03 | Tim Belcher | R | 27 | L 4-6 | @ CIN | 1 | 33 | L | 2.1 | 6 | 6 | 4 | 1 | 2 | 1 | 65 | 24 | 41 | 63% | 0-1 | 18.00 | 4.00 |
| 1989-04-05 | Orel Hershiser | R | 31 | L 3-4 | @ CIN | 1 | 159 | L | 7.0 | 7 | 4 | 2 | 0 | 1 | 6 | 106 | 40 | 66 | 62% | 0-1 | 2.57 | 1.14 |
| 1989-04-06 | Tim Leary | R | 30 | W 4-1 | @ CIN | 1 | 92 | W | 9.0 | 5 | 1 | 1 | 0 | 2 | 7 | 118 | 36 | 82 | 69% | 1-0 | 1.00 | 0.78 |
| 1989-04-07 | Fernando Valenzuela | L | 28 | L 1-6 | @ ATL | 1 | 257 | L | 6.2 | 8 | 5 | 5 | 0 | 4 | 8 | 121 | 52 | 69 | 57% | 0-1 | 6.43 | 1.71 |
| 1989-04-09 | Tim Belcher | R | 27 | W 4-2 | @ ATL | 2 | 34 | - | 5.0 | 4 | 2 | 2 | 0 | 5 | 2 | 87 | 38 | 49 | 56% | 0-1 | 7.71 | 2.43 |
| 1989-04-10 | Orel Hershiser | R | 31 | W 7-4 | @ SFN | 2 | 160 | W | 8.0 | 6 | 3 | 3 | 0 | 5 | 10 | 130 | 58 | 72 | 55% | 1-1 | 3.00 | 1.27 |
| 1989-04-11 | Tim Leary | R | 30 | L 3-8 | @ SFN | 2 | 93 | L | 6.0 | 7 | 4 | 4 | 1 | 1 | 3 | 98 | 42 | 56 | 57% | 1-1 | 3.00 | 1.00 |
| 1989-04-12 | Fernando Valenzuela | L | 28 | L 1-3 | @ SFN | 2 | 258 | L | 4.2 | 6 | 3 | 3 | 1 | 2 | 3 | 84 | 41 | 43 | 51% | 0-2 | 6.55 | 1.82 |
| 1989-04-13 | Tim Belcher | R | 27 | W 2-4 | vs HOU | 3 | 35 | - | 9.0 | 6 | 2 | 2 | 1 | 2 | 7 | 115 | 38 | 77 | 67% | 0-1 | 4.50 | 1.56 |
| 1989-04-14 | Mike Morgan | R | 30 | W 2-3 | vs HOU | 1 | 120 | L | 8.0 | 4 | 3 | 2 | 1 | 2 | 3 | 100 | 32 | 68 | 68% | 0-1 | 1.64 | 0.64 |
| 1989-04-15 | Orel Hershiser | R | 31 | L 3-1 | vs HOU | 3 | 161 | W | 7.2 | 7 | 1 | 0 | 0 | 1 | 2 | 96 | 28 | 68 | 71% | 2-1 | 1.96 | 1.17 |
| 1989-04-16 | Tim Leary | R | 30 | L 2-1 | vs HOU | 3 | 94 | W | 9.0 | 5 | 1 | 1 | 0 | 0 | 6 | 115 | 33 | 82 | 71% | 2-1 | 2.25 | 0.83 |
| 1989-04-17 | Fernando Valenzuela | L | 28 | W 2-3 | vs CIN | 3 | 259 | - | 5.0 | 3 | 0 | 0 | 0 | 4 | 3 | 77 | 33 | 44 | 57% | 0-2 | 4.50 | 1.69 |
| 1989-04-18 | Tim Belcher | R | 27 | L 6-0 | vs CIN | 4 | 36 | W | 9.0 | 4 | 0 | 0 | 0 | 0 | 10 | 124 | 35 | 89 | 72% | 1-1 | 2.88 | 1.16 |
| 1989-04-19 | Mike Morgan | R | 30 | L 3-0 | vs CIN | 2 | 121 | W | 5.2 | 4 | 0 | 0 | 0 | 0 | 1 | 69 | 28 | 41 | 59% | 1-1 | 1.13 | 0.69 |
| 1989-04-21 | Orel Hershiser | R | 31 | L 8-2 | vs SFN | 4 | 162 | W | 7.0 | 6 | 2 | 2 | 0 | 4 | 7 | 107 | 40 | 67 | 63% | 3-1 | 2.10 | 1.23 |
| 1989-04-22 | Tim Leary | R | 30 | W 4-5 | vs SFN | 4 | 95 | - | 5.0 | 5 | 4 | 4 | 1 | 3 | 3 | 77 | 31 | 46 | 60% | 2-1 | 3.10 | 0.97 |
| 1989-04-23 | Fernando Valenzuela | L | 28 | L 7-6 | vs SFN | 4 | 260 | - | 4.1 | 7 | 3 | 3 | 0 | 4 | 2 | 85 | 40 | 45 | 53% | 0-2 | 4.71 | 1.81 |
| 1989-04-25 | Tim Belcher | R | 28 | W 4-0 | @ CHN | 5 | 37 | W | 9.0 | 5 | 0 | 0 | 0 | 1 | 7 | 134 | 46 | 88 | 66% | 2-1 | 2.12 | 1.03 |
| 1989-04-26 | Mike Morgan | R | 30 | W 3-1 | @ CHN | 3 | 122 | W | 7.0 | 5 | 1 | 1 | 0 | 0 | 2 | 69 | 22 | 47 | 68% | 2-1 | 1.08 | 0.64 |
| 1989-04-27 | Orel Hershiser | R | 31 | L 0-1 | @ CHN | 5 | 163 | L | 7.0 | 3 | 1 | 1 | 0 | 1 | 4 | 83 | 31 | 52 | 63% | 3-2 | 1.95 | 1.11 |
| 1989-04-28 | Tim Leary | R | 30 | L 3-6 | @ SLN | 5 | 96 | L | 4.0 | 5 | 4 | 4 | 0 | 3 | 0 | 74 | 32 | 42 | 57% | 2-2 | 3.82 | 1.09 |
| 1989-04-29 | Fernando Valenzuela | L | 28 | L 0-1 | @ SLN | 5 | 261 | - | 7.0 | 4 | 0 | 0 | 0 | 1 | 1 | 95 | 36 | 59 | 62% | 0-2 | 3.54 | 1.54 |
| 1989-04-30 | Tim Belcher | R | 28 | L 3-4 | @ SLN | 6 | 38 | L | 4.2 | 6 | 4 | 3 | 0 | 2 | 3 | 79 | 28 | 51 | 65% | 2-2 | 2.54 | 1.10 |
| 1989-05-01 | Mike Morgan | R | 30 | L 1-0 | vs PIT | 4 | 123 | - | 8.0 | 5 | 0 | 0 | 0 | 0 | 7 | 106 | 41 | 65 | 61% | 2-1 | 0.82 | 0.64 |
| 1989-05-02 | Orel Hershiser | R | 31 | L 7-0 | vs PIT | 6 | 164 | W | 9.0 | 6 | 0 | 0 | 0 | 0 | 6 | 97 | 31 | 66 | 68% | 4-2 | 1.57 | 1.02 |
| 1989-05-03 | Tim Leary | R | 30 | L 4-3 | vs SLN | 6 | 97 | - | 7.0 | 8 | 2 | 2 | 0 | 2 | 3 | 88 | 31 | 57 | 65% | 2-2 | 3.60 | 1.15 |
| 1989-05-04 | Fernando Valenzuela | L | 29 | W 0-12 | vs SLN | 6 | 262 | L | 1.2 | 5 | 6 | 5 | 1 | 1 | 0 | 37 | 16 | 21 | 57% | 0-3 | 4.97 | 1.69 |
| 1989-05-05 | Tim Belcher | R | 28 | W 2-4 | vs CHN | 7 | 39 | L | 7.0 | 6 | 4 | 3 | 3 | 1 | 4 | 119 | 44 | 75 | 63% | 2-3 | 2.74 | 1.09 |
| 1989-05-06 | Mike Morgan | R | 30 | L 3-0 | vs CHN | 5 | 124 | W | 6.0 | 4 | 0 | 0 | 0 | 1 | 2 | 63 | 18 | 45 | 71% | 3-1 | 0.69 | 0.67 |
| 1989-05-07 | Orel Hershiser | R | 31 | W 2-4 | vs CHN | 7 | 165 | L | 8.0 | 9 | 4 | 4 | 0 | 2 | 3 | 85 | 29 | 56 | 66% | 4-3 | 2.00 | 1.07 |
| 1989-05-12 | Tim Leary | R | 30 | L 0-3 | @ PHI | 7 | 98 | L | 7.0 | 6 | 1 | 1 | 0 | 1 | 3 | 86 | 32 | 54 | 63% | 2-3 | 3.26 | 1.13 |
| 1989-05-13 | Tim Belcher | R | 28 | L 0-2 | @ PHI | 8 | 40 | L | 6.0 | 3 | 1 | 1 | 0 | 5 | 4 | 101 | 48 | 53 | 52% | 2-4 | 2.60 | 1.12 |
| 1989-05-14 | Orel Hershiser | R | 31 | W 9-0 | @ PHI | 8 | 166 | W | 9.0 | 2 | 0 | 0 | 0 | 4 | 7 | 128 | 53 | 75 | 59% | 5-3 | 1.71 | 1.02 |
| 1989-05-15 | Mike Morgan | R | 30 | W 3-1 | @ NYN | 6 | 125 | - | 7.2 | 4 | 1 | 1 | 1 | 1 | 9 | 106 | 37 | 69 | 65% | 3-1 | 0.77 | 0.66 |
| 1989-05-17 | Fernando Valenzuela | L | 29 | W 4-3 | @ NYN | 7 | 263 | - | 6.0 | 5 | 3 | 3 | 1 | 6 | 6 | 124 | 58 | 66 | 53% | 0-3 | 4.89 | 1.71 |
| 1989-05-18 | Tim Leary | R | 30 | L 3-5 | @ NYN | 8 | 99 | - | 5.0 | 6 | 2 | 2 | 1 | 3 | 3 | 97 | 42 | 55 | 57% | 2-3 | 3.29 | 1.19 |
| 1989-05-19 | Tim Belcher | R | 28 | W 8-0 | @ MON | 9 | 41 | W | 9.0 | 3 | 0 | 0 | 0 | 2 | 6 | 126 | 42 | 84 | 67% | 3-4 | 2.21 | 1.03 |
| 1989-05-20 | Orel Hershiser | R | 31 | W 3-2 | @ MON | 9 | 167 | W | 9.0 | 6 | 2 | 2 | 1 | 3 | 7 | 148 | 55 | 93 | 63% | 6-3 | 1.75 | 1.01 |
| 1989-05-21 | Mike Morgan | R | 30 | L 1-3 | @ MON | 7 | 126 | L | 5.0 | 5 | 3 | 3 | 0 | 4 | 4 | 86 | 40 | 46 | 53% | 3-2 | 1.21 | 0.77 |
| 1989-05-23 | Fernando Valenzuela | L | 29 | W 1-4 | vs PHI | 8 | 264 | L | 5.0 | 4 | 3 | 3 | 0 | 4 | 3 | 98 | 46 | 52 | 53% | 0-4 | 4.95 | 1.70 |
| 1989-05-24 | Tim Leary | R | 30 | L 4-2 | vs PHI | 9 | 100 | W | 8.0 | 6 | 2 | 2 | 1 | 4 | 6 | 127 | 53 | 74 | 58% | 3-3 | 3.15 | 1.20 |
| 1989-05-25 | Tim Belcher | R | 28 | L 7-6 | vs PHI | 10 | 42 | W | 7.1 | 9 | 6 | 6 | 1 | 1 | 7 | 139 | 45 | 94 | 68% | 4-4 | 2.78 | 1.07 |
| 1989-05-26 | Orel Hershiser | R | 31 | W 2-8 | vs NYN | 10 | 168 | L | 5.0 | 9 | 7 | 7 | 1 | 2 | 3 | 82 | 31 | 51 | 62% | 6-4 | 2.45 | 1.09 |
| 1989-05-27 | Mike Morgan | R | 30 | L 2-1 | vs NYN | 8 | 127 | W | 8.2 | 7 | 1 | 1 | 0 | 3 | 9 | 127 | 41 | 86 | 68% | 4-2 | 1.20 | 0.83 |
| 1989-05-28 | Fernando Valenzuela | L | 29 | L 4-3 | vs NYN | 9 | 265 | - | 6.0 | 3 | 2 | 2 | 0 | 2 | 3 | 96 | 41 | 55 | 57% | 0-4 | 4.70 | 1.59 |
| 1989-05-29 | Tim Leary | R | 30 | W 2-3 | vs MON | 10 | 101 | L | 8.1 | 9 | 3 | 3 | 0 | 4 | 6 | 130 | 56 | 74 | 57% | 3-4 | 3.18 | 1.25 |
| 1989-05-30 | Tim Belcher | R | 28 | W 4-5 | vs MON | 11 | 43 | - | 8.0 | 6 | 4 | 4 | 0 | 2 | 12 | 124 | 40 | 84 | 68% | 4-4 | 2.96 | 1.07 |
| 1989-05-31 | Orel Hershiser | R | 31 | L 9-4 | vs MON | 11 | 169 | W | 7.0 | 3 | 3 | 3 | 0 | 1 | 4 | 87 | 29 | 58 | 67% | 7-4 | 2.57 | 1.05 |
| 1989-06-01 | Mike Morgan | R | 30 | L 2-7 | @ HOU | 9 | 128 | L | 4.0 | 6 | 6 | 2 | 0 | 1 | 2 | 73 | 25 | 48 | 66% | 4-3 | 1.41 | 0.89 |
| 1989-06-02 | Fernando Valenzuela | L | 29 | L 0-1 | @ HOU | 10 | 266 | L | 7.0 | 5 | 1 | 1 | 0 | 2 | 5 | 123 | 50 | 73 | 59% | 0-5 | 4.25 | 1.51 |
| 1989-06-03 | Tim Leary | R | 30 | L 4-5 | @ HOU | 11 | 102 | - | 5.2 | 4 | 3 | 3 | 1 | 2 | 1 | 73 | 31 | 42 | 58% | 3-4 | 3.28 | 1.23 |
| 1989-06-04 | Tim Belcher | R | 28 | L 6-7 | @ HOU | 12 | 44 | - | 8.0 | 8 | 5 | 5 | 1 | 1 | 6 | 0 | 0 | 0 | -- | 4-4 | 3.21 | 1.07 |
| 1989-06-05 | Ramon Martinez | R | 21 | W 7-0 | @ ATL | 1 | 7 | W | 9.0 | 6 | 0 | 0 | 0 | 1 | 9 | 126 | 46 | 80 | 63% | 1-0 | 0.00 | 0.78 |
| 1989-06-05 | John Wetteland | R | 23 | W 5-2 | @ ATL | 1 | 1 | - | 5.0 | 2 | 2 | 2 | 0 | 2 | 5 | 72 | 30 | 42 | 58% | 0-0 | 2.70 | 0.80 |
| 1989-06-06 | Mike Morgan | R | 30 | L 0-3 | @ ATL | 10 | 129 | L | 7.0 | 9 | 2 | 2 | 0 | 1 | 2 | 93 | 41 | 52 | 56% | 4-4 | 1.48 | 0.93 |
| 1989-06-07 | Fernando Valenzuela | L | 29 | W 5-4 | @ ATL | 11 | 267 | W | 6.1 | 9 | 4 | 4 | 1 | 4 | 2 | 111 | 49 | 62 | 56% | 1-5 | 4.35 | 1.55 |
| 1989-06-09 | Orel Hershiser | R | 31 | W 0-4 | vs CIN | 12 | 170 | L | 6.0 | 9 | 4 | 4 | 2 | 1 | 4 | 75 | 23 | 52 | 69% | 7-5 | 2.60 | 1.07 |
| 1989-06-10 | Tim Belcher | R | 28 | W 0-5 | vs CIN | 13 | 45 | L | 4.1 | 5 | 4 | 3 | 0 | 4 | 3 | 65 | 30 | 35 | 54% | 4-5 | 3.34 | 1.11 |
| 1989-06-11 | Tim Leary | R | 30 | L 3-1 | vs CIN | 12 | 103 | W | 8.0 | 5 | 1 | 1 | 1 | 2 | 3 | 98 | 40 | 58 | 59% | 5-4 | 2.96 | 1.18 |
| 1989-06-12 | Mike Morgan | R | 30 | L 9-2 | vs CIN | 11 | 130 | W | 6.0 | 6 | 2 | 2 | 1 | 1 | 3 | 83 | 28 | 55 | 66% | 5-4 | 1.59 | 0.95 |
| 1989-06-13 | Fernando Valenzuela | L | 29 | L 3-2 | vs HOU | 12 | 268 | W | 7.1 | 4 | 2 | 2 | 0 | 4 | 3 | 110 | 50 | 60 | 55% | 2-5 | 4.16 | 1.51 |
| 1989-06-14 | Orel Hershiser | R | 31 | L 3-0 | vs HOU | 13 | 171 | W | 9.0 | 6 | 0 | 0 | 0 | 3 | 3 | 119 | 50 | 69 | 58% | 8-5 | 2.38 | 1.07 |
| 1989-06-15 | Tim Belcher | R | 28 | L 2-1 | vs HOU | 14 | 46 | - | 8.0 | 4 | 1 | 1 | 0 | 1 | 10 | 133 | 50 | 83 | 62% | 4-5 | 3.15 | 1.07 |
| 1989-06-16 | Tim Leary | R | 30 | W 1-6 | vs ATL | 13 | 104 | L | 5.0 | 5 | 4 | 4 | 1 | 2 | 0 | 68 | 23 | 45 | 66% | 5-5 | 3.20 | 1.19 |
| 1989-06-17 | Mike Morgan | R | 30 | W 1-2 | vs ATL | 12 | 131 | L | 8.0 | 5 | 2 | 1 | 1 | 0 | 2 | 96 | 26 | 70 | 73% | 5-5 | 1.55 | 0.92 |
| 1989-06-18 | Fernando Valenzuela | L | 29 | L 5-3 | vs ATL | 13 | 269 | W | 7.1 | 6 | 3 | 3 | 1 | 1 | 3 | 102 | 33 | 69 | 68% | 3-5 | 4.14 | 1.46 |
| 1989-06-19 | Orel Hershiser | R | 31 | L 1-5 | @ SDN | 14 | 172 | L | 6.0 | 7 | 5 | 2 | 2 | 1 | 8 | 92 | 31 | 61 | 66% | 8-6 | 2.41 | 1.08 |
| 1989-06-20 | Tim Belcher | R | 28 | L 0-2 | @ SDN | 15 | 47 | L | 4.0 | 5 | 2 | 2 | 0 | 4 | 3 | 84 | 41 | 43 | 51% | 4-6 | 3.21 | 1.12 |
| 1989-06-21 | Tim Leary | R | 30 | W 6-2 | @ SDN | 14 | 105 | W | 8.0 | 10 | 2 | 1 | 1 | 1 | 3 | 117 | 42 | 75 | 64% | 6-5 | 3.03 | 1.20 |
| 1989-06-23 | Mike Morgan | R | 30 | L 1-3 | @ CIN | 13 | 132 | L | 6.0 | 8 | 2 | 2 | 0 | 0 | 2 | 78 | 23 | 55 | 71% | 5-6 | 1.65 | 0.95 |
| 1989-06-24 | Fernando Valenzuela | L | 29 | W 10-3 | @ CIN | 14 | 270 | W | 6.0 | 9 | 3 | 3 | 0 | 3 | 4 | 112 | 41 | 71 | 63% | 4-5 | 4.16 | 1.50 |
| 1989-06-25 | Orel Hershiser | R | 31 | W 7-0 | @ CIN | 15 | 173 | W | 9.0 | 11 | 0 | 0 | 0 | 2 | 6 | 139 | 45 | 94 | 68% | 9-6 | 2.23 | 1.11 |
| 1989-06-26 | Tim Leary | R | 31 | L 3-5 | @ CIN | 15 | 106 | - | 6.0 | 7 | 3 | 3 | 1 | 0 | 1 | 74 | 22 | 52 | 70% | 6-5 | 3.12 | 1.20 |
| 1989-06-27 | John Tudor | L | 35 | W 3-5 | vs SDN | 1 | 239 | - | 4.1 | 5 | 2 | 2 | 0 | 2 | 3 | 71 | 24 | 47 | 66% | 0-0 | 4.50 | 1.75 |
| 1989-06-28 | Mike Morgan | R | 30 | W 1-2 | vs SDN | 14 | 133 | L | 7.2 | 6 | 2 | 2 | 0 | 2 | 4 | 91 | 31 | 60 | 66% | 5-7 | 1.69 | 0.95 |
| 1989-06-29 | Fernando Valenzuela | L | 29 | W 3-5 | vs SDN | 15 | 271 | L | 7.0 | 8 | 4 | 1 | 0 | 3 | 3 | 114 | 45 | 69 | 61% | 4-6 | 3.93 | 1.51 |
| 1989-06-30 | Orel Hershiser | R | 31 | W 3-4 | vs PIT | 16 | 174 | L | 6.0 | 7 | 4 | 4 | 0 | 1 | 3 | 86 | 30 | 56 | 65% | 9-7 | 2.41 | 1.12 |
| 1989-07-01 | Tim Leary | R | 31 | L 1-0 | vs PIT | 16 | 107 | - | 8.0 | 4 | 0 | 0 | 0 | 2 | 5 | 105 | 41 | 64 | 61% | 6-5 | 2.89 | 1.17 |
| 1989-07-02 | John Tudor | L | 35 | L 3-2 | vs PIT | 2 | 240 | - | 3.0 | 2 | 0 | 0 | 0 | 2 | 2 | 47 | 19 | 28 | 60% | 0-0 | 2.57 | 1.57 |
| 1989-07-03 | Mike Morgan | R | 30 | W 2-4 | vs PIT | 15 | 134 | L | 8.0 | 5 | 4 | 3 | 1 | 2 | 2 | 95 | 31 | 64 | 67% | 5-8 | 1.82 | 0.94 |
| 1989-07-04 | Fernando Valenzuela | L | 29 | L 1-2 | @ SLN | 16 | 272 | L | 6.0 | 4 | 2 | 2 | 0 | 2 | 6 | 107 | 44 | 63 | 59% | 4-7 | 3.87 | 1.47 |
| 1989-07-05 | Orel Hershiser | R | 31 | L 2-3 | @ SLN | 17 | 175 | - | 6.0 | 7 | 2 | 2 | 0 | 2 | 3 | 89 | 30 | 59 | 66% | 9-7 | 2.44 | 1.14 |
| 1989-07-06 | Tim Leary | R | 31 | L 2-14 | @ SLN | 17 | 108 | L | 4.0 | 7 | 5 | 5 | 0 | 2 | 2 | 81 | 31 | 50 | 62% | 6-6 | 3.18 | 1.21 |
| 1989-07-07 | John Tudor | L | 35 | L 4-6 | @ CHN | 3 | 241 | - | 1.0 | 4 | 3 | 3 | 1 | 0 | 0 | 10 | 0 | 10 | 100% | 0-0 | 5.63 | 1.88 |
| 1989-07-08 | Mike Morgan | R | 30 | W 8-2 | @ CHN | 16 | 135 | W | 6.1 | 8 | 1 | 1 | 0 | 2 | 1 | 76 | 30 | 46 | 61% | 6-8 | 1.80 | 0.98 |
| 1989-07-09 | Fernando Valenzuela | L | 29 | L 4-11 | @ CHN | 17 | 273 | L | 4.0 | 5 | 6 | 3 | 1 | 2 | 2 | 77 | 29 | 48 | 62% | 4-8 | 3.99 | 1.48 |
| 1989-07-13 | Orel Hershiser | R | 31 | L 3-2 | vs SLN | 18 | 176 | W | 8.1 | 6 | 2 | 2 | 0 | 3 | 4 | 122 | 47 | 75 | 61% | 10-7 | 2.45 | 1.14 |
| 1989-07-14 | Mike Morgan | R | 30 | W 2-7 | vs SLN | 17 | 136 | L | 3.0 | 6 | 6 | 6 | 1 | 1 | 1 | 51 | 17 | 34 | 67% | 6-9 | 2.21 | 1.02 |
| 1989-07-15 | Fernando Valenzuela | L | 29 | W 0-2 | vs SLN | 18 | 274 | L | 9.0 | 10 | 2 | 2 | 0 | 3 | 1 | 139 | 67 | 72 | 52% | 4-9 | 3.82 | 1.48 |
| 1989-07-16 | Tim Belcher | R | 28 | L 3-2 | vs SLN | 16 | 48 | W | 6.0 | 8 | 2 | 2 | 0 | 0 | 7 | 89 | 24 | 65 | 73% | 6-8 | 3.38 | 1.18 |
| 1989-07-17 | Ramon Martinez | R | 21 | W 3-6 | vs CHN | 2 | 8 | - | 6.0 | 3 | 3 | 3 | 1 | 5 | 5 | 96 | 37 | 59 | 61% | 1-0 | 1.80 | 1.00 |
| 1989-07-18 | Orel Hershiser | R | 31 | L 4-1 | vs CHN | 19 | 177 | W | 9.0 | 4 | 1 | 0 | 0 | 0 | 5 | 98 | 33 | 65 | 66% | 11-7 | 2.31 | 1.10 |
| 1989-07-19 | Mike Morgan | R | 30 | W 0-4 | vs CHN | 18 | 137 | L | 5.0 | 8 | 4 | 3 | 0 | 3 | 1 | 90 | 37 | 53 | 59% | 6-10 | 2.34 | 1.07 |
| 1989-07-21 | Tim Belcher | R | 28 | L 1-4 | @ PIT | 17 | 49 | L | 7.0 | 7 | 4 | 4 | 1 | 2 | 9 | 109 | 37 | 72 | 66% | 6-9 | 3.48 | 1.19 |
| 1989-07-21 | Fernando Valenzuela | L | 29 | W 7-3 | @ PIT | 19 | 275 | W | 7.0 | 4 | 2 | 2 | 0 | 6 | 2 | 136 | 63 | 73 | 54% | 5-9 | 3.74 | 1.48 |
| 1989-07-22 | Ramon Martinez | R | 21 | W 8-4 | @ PIT | 3 | 9 | W | 7.0 | 6 | 4 | 4 | 2 | 6 | 6 | 143 | 60 | 83 | 58% | 2-0 | 2.86 | 1.23 |
| 1989-07-23 | Orel Hershiser | R | 31 | W 4-3 | @ PIT | 20 | 178 | W | 7.2 | 6 | 3 | 3 | 0 | 2 | 4 | 118 | 42 | 76 | 64% | 12-7 | 2.36 | 1.09 |
| 1989-07-23 | John Wetteland | R | 23 | L 1-2 | @ PIT | 2 | 2 | - | 6.2 | 3 | 1 | 1 | 0 | 2 | 5 | 97 | 33 | 64 | 66% | 2-2 | 2.20 | 0.91 |
| 1989-07-24 | Mike Morgan | R | 30 | L 4-7 | @ PIT | 19 | 138 | L | 4.1 | 7 | 5 | 5 | 0 | 3 | 2 | 84 | 38 | 46 | 55% | 6-11 | 2.60 | 1.10 |
| 1989-07-25 | Tim Belcher | R | 28 | W 6-0 | @ HOU | 18 | 50 | W | 9.0 | 5 | 0 | 0 | 0 | 5 | 9 | 129 | 50 | 79 | 61% | 7-9 | 3.26 | 1.18 |
| 1989-07-26 | Fernando Valenzuela | L | 29 | L 2-6 | @ HOU | 20 | 276 | L | 6.2 | 9 | 6 | 5 | 0 | 4 | 2 | 122 | 53 | 69 | 57% | 5-10 | 3.90 | 1.50 |
| 1989-07-27 | Ramon Martinez | R | 21 | W 7-5 | @ HOU | 4 | 10 | - | 4.0 | 6 | 5 | 4 | 1 | 0 | 4 | 74 | 29 | 45 | 61% | 2-0 | 3.81 | 1.27 |
| 1989-07-28 | Orel Hershiser | R | 31 | L 1-2 | @ SDN | 21 | 179 | L | 8.0 | 7 | 2 | 2 | 0 | 5 | 4 | 119 | 53 | 66 | 55% | 12-8 | 2.36 | 1.11 |
| 1989-07-29 | John Wetteland | R | 23 | L 4-9 | @ SDN | 3 | 3 | L | 4.0 | 5 | 5 | 3 | 0 | 2 | 4 | 83 | 31 | 52 | 63% | 2-3 | 2.57 | 0.98 |
| 1989-07-30 | Tim Belcher | R | 28 | W 10-1 | @ SDN | 19 | 51 | W | 9.0 | 4 | 1 | 1 | 1 | 4 | 8 | 143 | 53 | 90 | 63% | 8-9 | 3.12 | 1.17 |
| 1989-08-01 | Fernando Valenzuela | L | 29 | W 2-5 | vs SFN | 21 | 277 | L | 7.0 | 5 | 3 | 1 | 1 | 2 | 4 | 103 | 40 | 63 | 61% | 5-11 | 3.76 | 1.47 |
| 1989-08-02 | Ramon Martinez | R | 21 | L 7-4 | vs SFN | 5 | 11 | W | 6.0 | 5 | 3 | 2 | 1 | 3 | 5 | 117 | 46 | 71 | 61% | 3-0 | 3.66 | 1.28 |
| 1989-08-03 | Orel Hershiser | R | 31 | L 6-3 | vs SFN | 22 | 180 | W | 7.0 | 7 | 3 | 3 | 1 | 2 | 7 | 114 | 44 | 70 | 61% | 13-8 | 2.42 | 1.12 |
| 1989-08-04 | John Wetteland | R | 23 | L 6-3 | vs SDN | 4 | 4 | W | 7.0 | 4 | 2 | 1 | 0 | 2 | 5 | 102 | 34 | 68 | 67% | 3-3 | 2.41 | 0.96 |
| 1989-08-05 | Tim Belcher | R | 28 | W 2-4 | vs SDN | 20 | 52 | L | 6.0 | 5 | 3 | 3 | 2 | 3 | 7 | 82 | 31 | 51 | 62% | 8-10 | 3.17 | 1.17 |
| 1989-08-06 | Fernando Valenzuela | L | 29 | L 4-2 | vs SDN | 22 | 278 | W | 7.0 | 9 | 2 | 2 | 1 | 3 | 4 | 116 | 47 | 69 | 59% | 6-11 | 3.69 | 1.49 |
| 1989-08-07 | Ramon Martinez | R | 21 | W 0-1 | vs ATL | 6 | 12 | L | 8.0 | 4 | 1 | 1 | 1 | 2 | 9 | 113 | 42 | 71 | 63% | 3-1 | 3.15 | 1.18 |
| 1989-08-08 | Orel Hershiser | R | 31 | L 10-2 | vs ATL | 23 | 181 | W | 9.0 | 7 | 2 | 2 | 1 | 3 | 2 | 116 | 46 | 70 | 60% | 14-8 | 2.40 | 1.12 |
| 1989-08-09 | John Wetteland | R | 23 | W 3-6 | vs ATL | 5 | 5 | L | 5.0 | 4 | 4 | 4 | 1 | 2 | 3 | 74 | 30 | 44 | 59% | 3-4 | 2.80 | 0.98 |
| 1989-08-11 | Tim Belcher | R | 28 | L 2-10 | @ SFN | 21 | 53 | L | 2.2 | 7 | 8 | 5 | 2 | 3 | 2 | 69 | 24 | 45 | 65% | 8-11 | 3.40 | 1.21 |
| 1989-08-12 | Fernando Valenzuela | L | 29 | W 5-1 | @ SFN | 23 | 279 | W | 9.0 | 2 | 1 | 0 | 0 | 3 | 6 | 143 | 58 | 85 | 59% | 7-11 | 3.46 | 1.43 |
| 1989-08-13 | Orel Hershiser | R | 31 | W 3-2 | @ SFN | 24 | 182 | - | 7.0 | 8 | 2 | 2 | 0 | 1 | 6 | 73 | 24 | 49 | 67% | 14-8 | 2.40 | 1.13 |
| 1989-08-15 | Ramon Martinez | R | 21 | L 6-7 | @ PHI | 7 | 13 | - | 5.0 | 5 | 4 | 4 | 2 | 2 | 5 | 0 | 0 | 0 | -- | 3-1 | 3.60 | 1.20 |
| 1989-08-16 | Tim Belcher | R | 28 | L 2-6 | @ PHI | 22 | 54 | L | 6.1 | 6 | 3 | 3 | 0 | 3 | 3 | 102 | 37 | 65 | 64% | 8-12 | 3.44 | 1.22 |
| 1989-08-17 | Fernando Valenzuela | L | 29 | W 10-4 | @ PHI | 24 | 280 | W | 6.0 | 9 | 3 | 3 | 0 | 2 | 1 | 108 | 47 | 61 | 56% | 8-11 | 3.50 | 1.44 |
| 1989-08-18 | Orel Hershiser | R | 31 | L 2-3 | @ NYN | 25 | 183 | L | 8.0 | 6 | 3 | 3 | 0 | 3 | 7 | 125 | 51 | 74 | 59% | 14-9 | 2.44 | 1.13 |
| 1989-08-19 | John Wetteland | R | 23 | L 1-4 | @ NYN | 6 | 6 | L | 4.0 | 5 | 3 | 3 | 0 | 2 | 2 | 69 | 28 | 41 | 59% | 3-5 | 3.05 | 1.03 |
| 1989-08-20 | Ramon Martinez | R | 21 | W 5-4 | @ NYN | 8 | 14 | - | 4.2 | 5 | 3 | 3 | 2 | 2 | 1 | 74 | 27 | 47 | 64% | 3-1 | 3.78 | 1.22 |
| 1989-08-21 | Tim Belcher | R | 28 | W 6-1 | @ MON | 23 | 55 | W | 8.0 | 5 | 1 | 1 | 1 | 5 | 6 | 129 | 55 | 74 | 57% | 9-12 | 3.33 | 1.23 |
| 1989-08-22 | Fernando Valenzuela | L | 29 | L 2-4 | @ MON | 25 | 281 | L | 6.0 | 7 | 4 | 3 | 1 | 3 | 6 | 100 | 43 | 57 | 57% | 8-12 | 3.54 | 1.45 |
| 1989-08-23 | Orel Hershiser | R | 31 | W 1-0 | @ MON | 26 | 184 | - | 7.0 | 4 | 0 | 0 | 0 | 2 | 6 | 79 | 37 | 42 | 53% | 14-9 | 2.36 | 1.12 |
| 1989-08-25 | Ramon Martinez | R | 21 | W 2-3 | vs PHI | 9 | 15 | L | 7.0 | 7 | 3 | 2 | 0 | 5 | 5 | 118 | 48 | 70 | 59% | 3-2 | 3.63 | 1.28 |
| 1989-08-26 | Tim Belcher | R | 28 | L 4-0 | vs PHI | 24 | 56 | W | 9.0 | 7 | 0 | 0 | 0 | 1 | 9 | 133 | 40 | 93 | 70% | 10-12 | 3.16 | 1.21 |
| 1989-08-27 | Fernando Valenzuela | L | 29 | L 8-1 | vs PHI | 26 | 282 | W | 7.0 | 6 | 1 | 1 | 0 | 2 | 5 | 105 | 33 | 72 | 69% | 9-12 | 3.44 | 1.44 |
| 1989-08-28 | Orel Hershiser | R | 31 | W 0-1 | vs NYN | 27 | 185 | L | 8.0 | 8 | 1 | 1 | 0 | 1 | 4 | 99 | 32 | 67 | 68% | 14-10 | 2.31 | 1.12 |
| 1989-08-29 | John Wetteland | R | 23 | W 1-2 | vs NYN | 7 | 7 | L | 7.0 | 5 | 2 | 2 | 0 | 2 | 10 | 110 | 37 | 73 | 66% | 4-6 | 2.77 | 1.00 |
| 1989-08-30 | Ramon Martinez | R | 21 | W 3-9 | vs NYN | 10 | 16 | L | 5.0 | 4 | 3 | 3 | 0 | 2 | 3 | 84 | 38 | 46 | 55% | 3-3 | 3.77 | 1.27 |
| 1989-09-01 | Tim Belcher | R | 28 | L 2-0 | vs MON | 25 | 57 | W | 9.0 | 5 | 0 | 0 | 0 | 2 | 3 | 115 | 45 | 70 | 61% | 11-12 | 3.02 | 1.19 |
| 1989-09-02 | Fernando Valenzuela | L | 29 | L 4-3 | vs MON | 27 | 283 | - | 7.0 | 6 | 3 | 3 | 0 | 4 | 3 | 96 | 42 | 54 | 56% | 9-12 | 3.46 | 1.44 |
| 1989-09-03 | Orel Hershiser | R | 31 | W 0-4 | vs MON | 28 | 186 | L | 5.0 | 7 | 4 | 2 | 0 | 3 | 3 | 82 | 30 | 52 | 63% | 14-11 | 2.34 | 1.14 |
| 1989-09-04 | John Wetteland | R | 23 | W 7-5 | @ HOU | 8 | 8 | - | 3.1 | 5 | 5 | 5 | 2 | 1 | 6 | 73 | 34 | 39 | 53% | 4-6 | 3.22 | 1.04 |
| 1989-09-05 | Ramon Martinez | R | 21 | L 2-3 | @ HOU | 11 | 17 | - | 7.0 | 5 | 1 | 1 | 0 | 3 | 4 | 117 | 45 | 72 | 62% | 3-3 | 3.52 | 1.26 |
| 1989-09-06 | Tim Belcher | R | 28 | L 5-9 | @ CIN | 26 | 58 | - | 5.1 | 7 | 5 | 5 | 1 | 4 | 5 | 126 | 58 | 68 | 54% | 11-12 | 3.15 | 1.21 |
| 1989-09-07 | Fernando Valenzuela | L | 29 | W 8-2 | @ CIN | 28 | 284 | W | 9.0 | 6 | 2 | 2 | 1 | 4 | 6 | 116 | 46 | 70 | 60% | 10-12 | 3.39 | 1.42 |
| 1989-09-08 | Orel Hershiser | R | 31 | L 0-1 | @ SDN | 29 | 187 | L | 7.0 | 7 | 1 | 1 | 0 | 4 | 6 | 128 | 53 | 75 | 59% | 14-12 | 2.31 | 1.15 |
| 1989-09-09 | John Wetteland | R | 23 | L 1-3 | @ SDN | 9 | 9 | L | 7.0 | 8 | 3 | 3 | 0 | 2 | 5 | 112 | 45 | 67 | 60% | 4-7 | 3.27 | 1.07 |
| 1989-09-10 | Ramon Martinez | R | 21 | W 14-8 | @ SDN | 12 | 18 | W | 6.0 | 7 | 4 | 3 | 0 | 5 | 4 | 116 | 48 | 68 | 59% | 4-3 | 3.60 | 1.32 |
| 1989-09-11 | Tim Belcher | R | 28 | L 8-2 | vs CIN | 27 | 59 | W | 6.1 | 6 | 2 | 2 | 2 | 3 | 6 | 93 | 36 | 57 | 61% | 12-12 | 3.15 | 1.22 |
| 1989-09-12 | Fernando Valenzuela | L | 29 | L 5-4 | vs CIN | 29 | 285 | - | 7.0 | 5 | 2 | 2 | 0 | 4 | 8 | 121 | 55 | 66 | 55% | 10-12 | 3.36 | 1.42 |
| 1989-09-13 | Orel Hershiser | R | 31 | W 1-3 | vs HOU | 30 | 188 | L | 8.0 | 6 | 3 | 3 | 1 | 4 | 5 | 134 | 49 | 85 | 63% | 14-13 | 2.35 | 1.15 |
| 1989-09-14 | John Wetteland | R | 23 | W 3-11 | vs HOU | 10 | 10 | L | 1.2 | 5 | 6 | 6 | 1 | 1 | 3 | 45 | 15 | 30 | 67% | 4-8 | 3.80 | 1.11 |
| 1989-09-15 | Ramon Martinez | R | 21 | L 5-0 | vs ATL | 13 | 19 | W | 9.0 | 5 | 0 | 0 | 0 | 3 | 12 | 142 | 55 | 87 | 61% | 5-3 | 3.21 | 1.27 |
| 1989-09-16 | Tim Belcher | R | 28 | L 1-0 | vs ATL | 28 | 60 | W | 9.0 | 3 | 0 | 0 | 0 | 1 | 9 | 107 | 34 | 73 | 68% | 13-12 | 3.01 | 1.18 |
| 1989-09-17 | Fernando Valenzuela | L | 29 | L 4-3 | vs ATL | 30 | 286 | - | 7.0 | 6 | 1 | 1 | 0 | 3 | 7 | 144 | 64 | 80 | 56% | 10-12 | 3.28 | 1.41 |
| 1989-09-19 | Orel Hershiser | R | 31 | L 2-3 | @ SFN | 31 | 189 | L | 5.0 | 8 | 3 | 3 | 0 | 2 | 4 | 0 | 0 | 0 | -- | 14-14 | 2.41 | 1.17 |
| 1989-09-20 | John Wetteland | R | 23 | L 7-8 | @ SFN | 11 | 11 | - | 5.2 | 3 | 3 | 3 | 1 | 4 | 2 | 0 | 0 | 0 | -- | 4-8 | 3.84 | 1.11 |
| 1989-09-21 | Ramon Martinez | R | 22 | L 3-4 | @ SFN | 14 | 20 | L | 6.1 | 7 | 4 | 4 | 0 | 0 | 6 | 105 | 39 | 66 | 63% | 5-4 | 3.40 | 1.27 |
| 1989-09-22 | Tim Belcher | R | 28 | L 2-1 | vs SDN | 29 | 61 | W | 9.0 | 3 | 1 | 1 | 1 | 3 | 5 | 113 | 38 | 75 | 66% | 14-12 | 2.93 | 1.16 |
| 1989-09-23 | Fernando Valenzuela | L | 29 | W 1-7 | vs SDN | 31 | 287 | L | 4.2 | 6 | 7 | 5 | 1 | 6 | 4 | 106 | 44 | 62 | 58% | 10-13 | 3.43 | 1.44 |
| 1989-09-24 | Orel Hershiser | R | 31 | W 0-1 | vs SDN | 32 | 190 | L | 7.0 | 8 | 1 | 1 | 0 | 2 | 5 | 90 | 32 | 58 | 64% | 14-15 | 2.38 | 1.18 |
| 1989-09-25 | John Wetteland | R | 23 | L 5-2 | vs SFN | 12 | 12 | W | 7.0 | 7 | 2 | 2 | 2 | 1 | 6 | 92 | 29 | 63 | 68% | 5-8 | 3.76 | 1.12 |
| 1989-09-26 | Ramon Martinez | R | 22 | L 2-1 | vs SFN | 15 | 21 | W | 8.2 | 4 | 1 | 1 | 1 | 2 | 11 | 132 | 49 | 83 | 63% | 6-4 | 3.18 | 1.21 |
| 1989-09-27 | Tim Belcher | R | 28 | L 1-0 | vs SFN | 30 | 62 | W | 9.0 | 4 | 0 | 0 | 0 | 1 | 11 | 113 | 38 | 75 | 66% | 15-12 | 2.82 | 1.14 |
| 1989-10-01 | Orel Hershiser | R | 31 | W 3-1 | @ ATL | 33 | 191 | W | 11.0 | 10 | 1 | 1 | 0 | 3 | 8 | 168 | 62 | 106 | 63% | 15-15 | 2.31 | 1.18 |