| Central | W | L | Pct | GB |
| Minnesota | 90 | 72 | .556 | -- |
| Chi White Sox | 86 | 76 | .531 | 4.0 |
| KC Royals | 83 | 79 | .512 | 7.0 |
| Cleveland | 68 | 94 | .420 | 22.0 |
| Detroit | 43 | 119 | .265 | 47.0 |
| 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 |
| 2003-03-31 | Mike Maroth | L | 26 | W 1-3 | vs MIN | 1 | 22 | L | 7.0 | 5 | 2 | 2 | 1 | 0 | 3 | 81 | 31 | 50 | 62% | 0-1 | 2.57 | 0.71 |
| 2003-04-02 | Jeremy Bonderman | R | 20 | W 1-8 | vs MIN | 1 | 1 | L | 4.0 | 9 | 6 | 6 | 1 | 1 | 5 | 80 | 30 | 50 | 63% | 0-1 | 13.50 | 2.50 |
| 2003-04-03 | Adam Bernero | R | 26 | W 0-3 | vs MIN | 1 | 16 | L | 7.0 | 5 | 2 | 2 | 0 | 1 | 1 | 87 | 30 | 57 | 66% | 0-1 | 2.57 | 0.86 |
| 2003-04-04 | Nate Cornejo | R | 24 | L 2-5 | @ CHA | 1 | 20 | L | 1.1 | 6 | 4 | 4 | 1 | 0 | 1 | 38 | 10 | 28 | 74% | 0-1 | 36.00 | 6.00 |
| 2003-04-05 | Mike Maroth | L | 26 | L 0-7 | @ CHA | 2 | 23 | L | 4.1 | 9 | 4 | 4 | 1 | 2 | 4 | 92 | 40 | 52 | 57% | 0-2 | 4.91 | 1.45 |
| 2003-04-06 | Gary Knotts | R | 26 | L 2-10 | @ CHA | 1 | 2 | - | 5.1 | 5 | 1 | 1 | 1 | 2 | 4 | 102 | 38 | 64 | 63% | 0-0 | 1.80 | 1.40 |
| 2003-04-09 | Jeremy Bonderman | R | 20 | W 6-9 | vs KCA | 2 | 2 | L | 2.1 | 4 | 5 | 5 | 0 | 4 | 1 | 60 | 33 | 27 | 45% | 0-2 | 16.50 | 3.00 |
| 2003-04-10 | Mike Maroth | L | 26 | W 2-4 | vs KCA | 3 | 24 | L | 7.0 | 5 | 2 | 2 | 0 | 1 | 4 | 100 | 39 | 61 | 61% | 0-3 | 4.00 | 1.22 |
| 2003-04-11 | Adam Bernero | R | 26 | W 0-5 | vs CHA | 2 | 17 | L | 7.0 | 6 | 3 | 3 | 2 | 3 | 3 | 111 | 46 | 65 | 59% | 0-2 | 3.21 | 1.07 |
| 2003-04-12 | Nate Cornejo | R | 24 | L 4-3 | vs CHA | 2 | 21 | W | 6.0 | 7 | 1 | 1 | 1 | 2 | 3 | 88 | 38 | 50 | 57% | 1-1 | 6.43 | 2.14 |
| 2003-04-13 | Gary Knotts | R | 26 | W 2-3 | vs CHA | 2 | 3 | L | 7.0 | 7 | 3 | 2 | 0 | 1 | 5 | 95 | 33 | 62 | 65% | 0-1 | 2.25 | 1.25 |
| 2003-04-15 | Mike Maroth | L | 26 | L 4-6 | @ MIN | 4 | 25 | L | 5.1 | 9 | 5 | 5 | 1 | 1 | 3 | 107 | 40 | 67 | 63% | 0-4 | 4.88 | 1.33 |
| 2003-04-16 | Adam Bernero | R | 26 | L 2-4 | @ MIN | 3 | 18 | L | 5.2 | 10 | 4 | 4 | 0 | 2 | 0 | 93 | 36 | 57 | 61% | 0-3 | 4.05 | 1.35 |
| 2003-04-17 | Jeremy Bonderman | R | 20 | L 0-6 | @ MIN | 3 | 3 | L | 6.0 | 10 | 4 | 3 | 2 | 1 | 4 | 95 | 34 | 61 | 64% | 0-3 | 10.50 | 2.42 |
| 2003-04-18 | Nate Cornejo | R | 24 | L 3-4 | @ KCA | 3 | 22 | - | 7.0 | 6 | 3 | 2 | 1 | 2 | 2 | 98 | 38 | 60 | 61% | 1-1 | 4.50 | 1.64 |
| 2003-04-19 | Gary Knotts | R | 26 | L 2-9 | @ KCA | 3 | 4 | L | 2.1 | 5 | 5 | 5 | 1 | 2 | 2 | 53 | 25 | 28 | 53% | 0-2 | 4.80 | 1.47 |
| 2003-04-20 | Mike Maroth | L | 26 | L 3-4 | @ KCA | 5 | 26 | L | 8.0 | 4 | 4 | 3 | 1 | 0 | 3 | 116 | 43 | 73 | 63% | 0-5 | 4.50 | 1.13 |
| 2003-04-22 | Adam Bernero | R | 26 | L 5-6 | @ OAK | 4 | 19 | - | 6.0 | 10 | 4 | 4 | 0 | 1 | 4 | 101 | 33 | 68 | 67% | 0-3 | 4.50 | 1.46 |
| 2003-04-23 | Jeremy Bonderman | R | 20 | W 4-1 | @ OAK | 4 | 4 | W | 8.0 | 3 | 1 | 1 | 0 | 0 | 5 | 102 | 38 | 64 | 63% | 1-3 | 6.75 | 1.60 |
| 2003-04-24 | Nate Cornejo | R | 24 | L 0-2 | @ OAK | 4 | 23 | L | 6.0 | 5 | 1 | 1 | 0 | 2 | 0 | 97 | 38 | 59 | 61% | 1-2 | 3.60 | 1.50 |
| 2003-04-25 | Mike Maroth | L | 26 | L 0-6 | @ SEA | 6 | 27 | L | 2.0 | 8 | 6 | 6 | 0 | 1 | 2 | 58 | 23 | 35 | 60% | 0-6 | 5.82 | 1.32 |
| 2003-04-26 | Gary Knotts | R | 26 | W 6-4 | @ SEA | 4 | 5 | - | 4.1 | 6 | 4 | 4 | 1 | 4 | 2 | 86 | 38 | 48 | 56% | 0-2 | 5.68 | 1.68 |
| 2003-04-27 | Adam Bernero | R | 26 | L 3-4 | @ SEA | 5 | 20 | L | 7.0 | 5 | 4 | 4 | 0 | 3 | 3 | 113 | 47 | 66 | 58% | 0-4 | 4.64 | 1.39 |
| 2003-04-29 | Jeremy Bonderman | R | 21 | W 3-11 | vs BAL | 5 | 5 | L | 5.2 | 9 | 5 | 4 | 0 | 2 | 6 | 119 | 52 | 67 | 56% | 1-4 | 6.58 | 1.65 |
| 2003-05-01 | Nate Cornejo | R | 24 | W 2-5 | vs BAL | 5 | 24 | - | 7.0 | 5 | 1 | 1 | 0 | 2 | 0 | 87 | 35 | 52 | 60% | 1-2 | 3.00 | 1.37 |
| 2003-05-01 | Mike Maroth | L | 26 | W 4-6 | vs BAL | 7 | 28 | L | 7.2 | 4 | 4 | 4 | 0 | 0 | 5 | 112 | 42 | 70 | 63% | 0-7 | 5.71 | 1.20 |
| 2003-05-02 | Gary Knotts | R | 26 | W 0-2 | vs TBA | 5 | 6 | L | 7.2 | 5 | 1 | 1 | 0 | 2 | 0 | 93 | 38 | 55 | 59% | 0-3 | 4.33 | 1.44 |
| 2003-05-03 | Adam Bernero | R | 26 | W 6-8 | vs TBA | 6 | 21 | - | 4.2 | 5 | 5 | 5 | 2 | 4 | 2 | 79 | 36 | 43 | 54% | 0-4 | 5.35 | 1.49 |
| 2003-05-04 | Jeremy Bonderman | R | 21 | L 7-3 | vs TBA | 6 | 6 | W | 6.0 | 3 | 2 | 2 | 1 | 1 | 5 | 82 | 34 | 48 | 59% | 2-4 | 5.91 | 1.47 |
| 2003-05-05 | Nate Cornejo | R | 24 | W 6-1 | @ BAL | 6 | 25 | W | 7.1 | 6 | 1 | 1 | 0 | 3 | 1 | 102 | 44 | 58 | 57% | 2-2 | 2.57 | 1.31 |
| 2003-05-06 | Mike Maroth | L | 26 | W 7-6 | @ BAL | 8 | 29 | - | 7.0 | 3 | 3 | 3 | 1 | 2 | 2 | 105 | 41 | 64 | 61% | 0-7 | 5.44 | 1.13 |
| 2003-05-07 | Gary Knotts | R | 26 | W 9-4 | @ BAL | 6 | 7 | W | 5.0 | 6 | 4 | 4 | 1 | 3 | 1 | 89 | 39 | 50 | 56% | 1-3 | 4.78 | 1.50 |
| 2003-05-09 | Adam Bernero | R | 26 | L 0-2 | @ TBA | 7 | 22 | L | 7.0 | 7 | 2 | 2 | 1 | 2 | 5 | 97 | 38 | 59 | 61% | 0-5 | 4.91 | 1.45 |
| 2003-05-10 | Jeremy Bonderman | R | 21 | L 1-3 | @ TBA | 7 | 7 | L | 6.2 | 8 | 3 | 3 | 1 | 1 | 2 | 90 | 30 | 60 | 67% | 2-5 | 5.54 | 1.44 |
| 2003-05-11 | Nate Cornejo | R | 24 | W 9-2 | @ TBA | 7 | 26 | W | 6.0 | 7 | 2 | 2 | 1 | 1 | 0 | 76 | 29 | 47 | 62% | 3-2 | 2.63 | 1.32 |
| 2003-05-13 | Mike Maroth | L | 26 | W 1-3 | vs OAK | 9 | 30 | L | 6.1 | 5 | 3 | 3 | 0 | 3 | 2 | 101 | 45 | 56 | 55% | 0-8 | 5.24 | 1.13 |
| 2003-05-14 | Gary Knotts | R | 26 | L 2-1 | vs OAK | 7 | 8 | - | 7.0 | 5 | 1 | 1 | 0 | 1 | 2 | 102 | 39 | 63 | 62% | 1-3 | 4.15 | 1.38 |
| 2003-05-15 | Adam Bernero | R | 26 | W 2-11 | vs OAK | 8 | 23 | L | 3.1 | 8 | 8 | 8 | 0 | 3 | 2 | 81 | 37 | 44 | 54% | 0-6 | 6.00 | 1.56 |
| 2003-05-16 | Jeremy Bonderman | R | 21 | W 3-6 | vs SEA | 8 | 8 | L | 5.0 | 5 | 4 | 4 | 1 | 5 | 7 | 99 | 41 | 58 | 59% | 2-6 | 5.73 | 1.50 |
| 2003-05-17 | Nate Cornejo | R | 24 | W 3-6 | vs SEA | 8 | 27 | L | 5.0 | 8 | 5 | 5 | 3 | 1 | 0 | 95 | 41 | 54 | 57% | 3-3 | 3.33 | 1.37 |
| 2003-05-18 | Mike Maroth | L | 26 | W 2-6 | vs SEA | 10 | 31 | L | 5.0 | 8 | 6 | 6 | 3 | 1 | 1 | 99 | 34 | 65 | 66% | 0-9 | 5.70 | 1.18 |
| 2003-05-19 | Gary Knotts | R | 26 | L 9-10 | @ CLE | 8 | 9 | - | 4.1 | 7 | 5 | 5 | 1 | 3 | 2 | 76 | 39 | 37 | 49% | 1-3 | 4.81 | 1.49 |
| 2003-05-20 | Adam Bernero | R | 26 | L 4-6 | @ CLE | 9 | 24 | - | 6.0 | 5 | 3 | 3 | 1 | 1 | 5 | 102 | 41 | 61 | 60% | 0-6 | 5.83 | 1.50 |
| 2003-05-21 | Jeremy Bonderman | R | 21 | L 0-4 | @ CLE | 9 | 9 | L | 5.0 | 6 | 4 | 3 | 0 | 5 | 5 | 104 | 47 | 57 | 55% | 2-7 | 5.69 | 1.57 |
| 2003-05-22 | Nate Cornejo | R | 24 | W 3-2 | @ CLE | 9 | 28 | - | 7.1 | 4 | 2 | 2 | 0 | 1 | 2 | 107 | 47 | 60 | 56% | 3-3 | 3.23 | 1.28 |
| 2003-05-23 | Mike Maroth | L | 26 | W 3-2 | @ CHA | 11 | 32 | W | 7.0 | 3 | 2 | 2 | 1 | 2 | 3 | 100 | 39 | 61 | 61% | 1-9 | 5.37 | 1.13 |
| 2003-05-24 | Gary Knotts | R | 26 | W 1-0 | @ CHA | 9 | 10 | W | 7.2 | 2 | 0 | 0 | 0 | 2 | 6 | 114 | 44 | 70 | 61% | 2-3 | 4.06 | 1.33 |
| 2003-05-25 | Adam Bernero | R | 26 | L 5-8 | @ CHA | 10 | 25 | - | 6.0 | 6 | 5 | 5 | 1 | 2 | 4 | 97 | 39 | 58 | 60% | 0-6 | 6.00 | 1.48 |
| 2003-05-26 | Jeremy Bonderman | R | 21 | L 6-5 | vs CLE | 10 | 10 | - | 6.0 | 3 | 2 | 2 | 1 | 1 | 7 | 82 | 29 | 53 | 65% | 2-7 | 5.40 | 1.47 |
| 2003-05-27 | Nate Cornejo | R | 24 | W 2-5 | vs CLE | 10 | 29 | - | 7.0 | 5 | 2 | 1 | 1 | 2 | 2 | 105 | 42 | 63 | 60% | 3-3 | 3.00 | 1.25 |
| 2003-05-28 | Mike Maroth | L | 26 | W 2-8 | vs CLE | 12 | 33 | L | 1.1 | 2 | 4 | 2 | 0 | 2 | 0 | 35 | 17 | 18 | 51% | 1-10 | 5.56 | 1.18 |
| 2003-05-30 | Gary Knotts | R | 26 | W 0-6 | vs NYA | 10 | 11 | L | 4.1 | 7 | 5 | 5 | 1 | 3 | 4 | 75 | 28 | 47 | 63% | 2-4 | 4.58 | 1.42 |
| 2003-05-31 | Adam Bernero | R | 27 | L 4-2 | vs NYA | 11 | 26 | W | 7.0 | 3 | 2 | 2 | 1 | 2 | 7 | 102 | 38 | 64 | 63% | 1-6 | 5.64 | 1.40 |
| 2003-06-01 | Jeremy Bonderman | R | 21 | W 9-10 | vs NYA | 11 | 11 | - | 4.2 | 7 | 7 | 4 | 1 | 4 | 3 | 90 | 37 | 53 | 59% | 2-7 | 5.64 | 1.56 |
| 2003-06-03 | Nate Cornejo | R | 24 | W 3-2 | @ SDN | 11 | 30 | - | 7.0 | 9 | 1 | 1 | 0 | 1 | 1 | 84 | 34 | 50 | 60% | 3-3 | 2.82 | 1.27 |
| 2003-06-04 | Gary Knotts | R | 26 | W 5-3 | @ SDN | 11 | 12 | - | 4.0 | 4 | 3 | 3 | 0 | 6 | 2 | 83 | 40 | 43 | 52% | 2-4 | 4.73 | 1.49 |
| 2003-06-05 | Adam Bernero | R | 27 | L 1-5 | @ SDN | 12 | 27 | L | 6.0 | 5 | 2 | 2 | 1 | 4 | 4 | 110 | 42 | 68 | 62% | 1-7 | 5.42 | 1.41 |
| 2003-06-06 | Jeremy Bonderman | R | 21 | L 3-5 | @ SFN | 12 | 12 | L | 6.0 | 6 | 4 | 3 | 0 | 3 | 1 | 84 | 33 | 51 | 61% | 2-8 | 5.54 | 1.55 |
| 2003-06-07 | Mike Maroth | L | 26 | L 5-7 | @ SFN | 13 | 34 | L | 6.0 | 6 | 2 | 2 | 1 | 1 | 3 | 89 | 37 | 52 | 58% | 1-11 | 5.35 | 1.18 |
| 2003-06-08 | Nate Cornejo | R | 24 | L 6-7 | @ SFN | 12 | 31 | - | 5.1 | 11 | 4 | 4 | 0 | 1 | 1 | 73 | 28 | 45 | 62% | 3-3 | 3.13 | 1.35 |
| 2003-06-10 | Gary Knotts | R | 26 | W 1-3 | vs LAN | 12 | 13 | - | 8.0 | 3 | 1 | 1 | 0 | 2 | 2 | 113 | 38 | 75 | 66% | 2-4 | 4.30 | 1.39 |
| 2003-06-11 | Adam Bernero | R | 27 | W 1-3 | vs LAN | 13 | 28 | L | 7.2 | 4 | 3 | 3 | 0 | 3 | 7 | 121 | 44 | 77 | 64% | 1-8 | 5.29 | 1.38 |
| 2003-06-12 | Jeremy Bonderman | R | 21 | W 2-3 | vs LAN | 13 | 13 | L | 7.0 | 10 | 3 | 3 | 0 | 0 | 2 | 91 | 28 | 63 | 69% | 2-9 | 5.38 | 1.54 |
| 2003-06-13 | Nate Cornejo | R | 24 | W 2-7 | vs COL | 13 | 32 | L | 5.0 | 10 | 6 | 6 | 1 | 3 | 1 | 100 | 40 | 60 | 60% | 3-4 | 3.62 | 1.43 |
| 2003-06-14 | Mike Maroth | L | 26 | L 9-7 | vs COL | 14 | 35 | - | 5.0 | 6 | 3 | 3 | 1 | 1 | 2 | 82 | 30 | 52 | 63% | 1-11 | 5.35 | 1.19 |
| 2003-06-15 | Gary Knotts | R | 26 | W 4-5 | vs COL | 13 | 14 | L | 4.2 | 9 | 5 | 5 | 1 | 2 | 3 | 87 | 34 | 53 | 61% | 2-5 | 4.63 | 1.44 |
| 2003-06-17 | Adam Bernero | R | 27 | W 4-7 | vs CLE | 14 | 29 | L | 3.2 | 6 | 6 | 6 | 3 | 2 | 0 | 70 | 33 | 37 | 53% | 1-9 | 5.68 | 1.40 |
| 2003-06-18 | Jeremy Bonderman | R | 21 | W 1-4 | vs CLE | 14 | 14 | L | 6.1 | 7 | 3 | 3 | 0 | 0 | 8 | 90 | 30 | 60 | 67% | 2-10 | 5.24 | 1.49 |
| 2003-06-19 | Nate Cornejo | R | 24 | W 3-10 | vs CLE | 14 | 33 | L | 4.2 | 6 | 6 | 6 | 2 | 1 | 1 | 73 | 27 | 46 | 63% | 3-5 | 4.06 | 1.43 |
| 2003-06-20 | Mike Maroth | L | 26 | W 7-5 | @ COL | 15 | 36 | W | 6.0 | 9 | 3 | 2 | 0 | 1 | 1 | 71 | 26 | 45 | 63% | 2-11 | 5.19 | 1.22 |
| 2003-06-21 | Matt Roney | R | 23 | L 6-9 | @ COL | 1 | 1 | - | 3.2 | 4 | 2 | 2 | 0 | 3 | 1 | 68 | 30 | 38 | 56% | 0-1 | 3.15 | 1.20 |
| 2003-06-22 | Adam Bernero | R | 27 | L 3-5 | @ COL | 15 | 30 | L | 6.0 | 6 | 5 | 5 | 0 | 2 | 5 | 90 | 34 | 56 | 62% | 1-10 | 5.80 | 1.40 |
| 2003-06-23 | Jeremy Bonderman | R | 21 | L 1-3 | @ BOS | 15 | 15 | L | 6.0 | 8 | 2 | 2 | 0 | 0 | 2 | 91 | 31 | 60 | 66% | 2-11 | 5.08 | 1.48 |
| 2003-06-24 | Nate Cornejo | R | 24 | L 1-10 | @ BOS | 15 | 34 | L | 4.0 | 10 | 6 | 6 | 0 | 3 | 0 | 81 | 39 | 42 | 52% | 3-6 | 4.50 | 1.51 |
| 2003-06-25 | Mike Maroth | L | 26 | L 2-11 | @ BOS | 16 | 37 | L | 7.0 | 7 | 2 | 2 | 1 | 2 | 4 | 118 | 51 | 67 | 57% | 2-12 | 4.99 | 1.23 |
| 2003-06-26 | Matt Roney | R | 23 | L 4-6 | @ BOS | 2 | 2 | L | 3.2 | 7 | 5 | 5 | 1 | 3 | 2 | 83 | 33 | 50 | 60% | 0-2 | 3.98 | 1.35 |
| 2003-06-27 | Adam Bernero | R | 27 | W 3-8 | vs ARI | 16 | 31 | L | 6.1 | 6 | 4 | 4 | 0 | 4 | 2 | 106 | 44 | 62 | 58% | 1-11 | 5.81 | 1.42 |
| 2003-06-28 | Jeremy Bonderman | R | 21 | W 0-7 | vs ARI | 16 | 16 | L | 6.0 | 7 | 5 | 3 | 0 | 0 | 5 | 106 | 37 | 69 | 65% | 2-12 | 5.04 | 1.46 |
| 2003-06-29 | Nate Cornejo | R | 24 | W 3-5 | vs ARI | 16 | 35 | - | 6.1 | 7 | 2 | 2 | 0 | 2 | 2 | 91 | 35 | 56 | 62% | 3-6 | 4.40 | 1.51 |
| 2003-06-30 | Mike Maroth | L | 26 | L 6-2 | vs TOR | 17 | 38 | W | 7.0 | 8 | 2 | 2 | 0 | 1 | 4 | 108 | 43 | 65 | 60% | 3-12 | 4.82 | 1.23 |
| 2003-07-01 | Matt Roney | R | 23 | L 5-0 | vs TOR | 3 | 3 | W | 7.0 | 1 | 0 | 0 | 0 | 2 | 4 | 97 | 38 | 59 | 61% | 1-2 | 3.42 | 1.22 |
| 2003-07-02 | Adam Bernero | R | 27 | W 2-8 | vs TOR | 17 | 32 | L | 3.1 | 7 | 5 | 5 | 2 | 0 | 0 | 45 | 16 | 29 | 64% | 1-12 | 6.03 | 1.43 |
| 2003-07-03 | Jeremy Bonderman | R | 21 | L 2-3 | @ KCA | 17 | 17 | L | 6.1 | 6 | 3 | 3 | 1 | 2 | 7 | 90 | 36 | 54 | 60% | 2-13 | 5.01 | 1.45 |
| 2003-07-04 | Nate Cornejo | R | 24 | L 8-9 | @ KCA | 17 | 36 | L | 3.0 | 9 | 7 | 6 | 0 | 1 | 0 | 67 | 24 | 43 | 64% | 3-7 | 4.83 | 1.57 |
| 2003-07-05 | Mike Maroth | L | 26 | W 9-5 | @ KCA | 18 | 39 | W | 7.2 | 8 | 4 | 4 | 2 | 3 | 2 | 118 | 47 | 71 | 60% | 4-12 | 4.79 | 1.24 |
| 2003-07-06 | Matt Roney | R | 23 | L 3-5 | @ KCA | 4 | 4 | L | 5.0 | 5 | 4 | 3 | 1 | 4 | 1 | 102 | 50 | 52 | 51% | 1-3 | 3.60 | 1.27 |
| 2003-07-08 | Wil Ledezma | L | 22 | L 2-1 | vs CHA | 1 | 1 | - | 5.0 | 5 | 0 | 0 | 0 | 0 | 4 | 72 | 25 | 47 | 65% | 2-2 | 3.60 | 1.24 |
| 2003-07-09 | Jeremy Bonderman | R | 21 | L 4-2 | vs CHA | 18 | 18 | W | 6.1 | 3 | 2 | 2 | 1 | 1 | 3 | 96 | 36 | 60 | 63% | 3-13 | 4.89 | 1.41 |
| 2003-07-10 | Nate Cornejo | R | 24 | L 1-0 | vs CHA | 18 | 37 | W | 8.0 | 7 | 0 | 0 | 0 | 2 | 2 | 107 | 41 | 66 | 62% | 4-7 | 4.46 | 1.53 |
| 2003-07-11 | Mike Maroth | L | 26 | W 3-5 | vs BOS | 19 | 40 | L | 5.2 | 10 | 4 | 4 | 0 | 3 | 4 | 99 | 38 | 61 | 62% | 4-13 | 4.90 | 1.30 |
| 2003-07-12 | Matt Roney | R | 24 | W 2-4 | vs BOS | 5 | 5 | - | 6.2 | 4 | 1 | 1 | 1 | 2 | 7 | 94 | 36 | 58 | 62% | 1-3 | 3.34 | 1.23 |
| 2003-07-13 | Wil Ledezma | L | 22 | L 3-0 | vs BOS | 2 | 2 | W | 7.0 | 6 | 0 | 0 | 0 | 0 | 2 | 92 | 27 | 65 | 71% | 3-2 | 3.12 | 1.19 |
| 2003-07-17 | Mike Maroth | L | 26 | W 10-9 | @ CHA | 20 | 41 | W | 6.1 | 8 | 5 | 5 | 2 | 0 | 1 | 91 | 32 | 59 | 65% | 5-13 | 4.99 | 1.29 |
| 2003-07-18 | Matt Roney | R | 24 | L 5-7 | @ CHA | 6 | 6 | L | 5.0 | 9 | 5 | 5 | 1 | 3 | 1 | 95 | 34 | 61 | 64% | 1-4 | 3.76 | 1.31 |
| 2003-07-19 | Nate Cornejo | R | 24 | L 2-6 | @ CHA | 19 | 38 | L | 6.2 | 3 | 3 | 3 | 0 | 3 | 3 | 93 | 35 | 58 | 62% | 4-8 | 4.42 | 1.49 |
| 2003-07-20 | Wil Ledezma | L | 22 | L 1-10 | @ CHA | 3 | 3 | L | 3.2 | 12 | 7 | 7 | 3 | 0 | 1 | 93 | 33 | 60 | 65% | 3-3 | 4.02 | 1.32 |
| 2003-07-21 | Jeremy Bonderman | R | 21 | L 5-14 | @ BOS | 19 | 19 | L | 2.0 | 8 | 7 | 7 | 1 | 1 | 0 | 43 | 17 | 26 | 60% | 3-14 | 5.40 | 1.47 |
| 2003-07-22 | Mike Maroth | L | 26 | L 4-7 | @ BOS | 21 | 42 | L | 5.2 | 10 | 7 | 7 | 3 | 4 | 3 | 108 | 46 | 62 | 57% | 5-14 | 5.30 | 1.35 |
| 2003-07-23 | Matt Roney | R | 24 | L 1-4 | @ CLE | 7 | 7 | L | 7.0 | 6 | 4 | 4 | 1 | 3 | 2 | 98 | 43 | 55 | 56% | 1-5 | 3.89 | 1.31 |
| 2003-07-24 | Nate Cornejo | R | 24 | W 7-4 | @ CLE | 20 | 39 | W | 6.2 | 9 | 3 | 3 | 0 | 0 | 4 | 115 | 41 | 74 | 64% | 5-8 | 4.38 | 1.48 |
| 2003-07-25 | Wil Ledezma | L | 23 | W 3-8 | vs KCA | 4 | 4 | L | 5.1 | 9 | 4 | 4 | 0 | 2 | 4 | 106 | 36 | 70 | 66% | 3-4 | 4.28 | 1.39 |
| 2003-07-26 | Jeremy Bonderman | R | 21 | L 5-1 | vs KCA | 20 | 20 | W | 8.0 | 3 | 1 | 1 | 0 | 3 | 4 | 109 | 40 | 69 | 63% | 4-14 | 5.10 | 1.42 |
| 2003-07-27 | Mike Maroth | L | 26 | W 1-5 | vs KCA | 22 | 43 | L | 7.0 | 7 | 5 | 5 | 2 | 2 | 1 | 102 | 46 | 56 | 55% | 5-15 | 5.36 | 1.35 |
| 2003-07-29 | Matt Roney | R | 24 | L 5-11 | @ SEA | 8 | 8 | L | 2.0 | 6 | 7 | 7 | 2 | 0 | 1 | 49 | 18 | 31 | 63% | 1-6 | 4.62 | 1.36 |
| 2003-07-30 | Nate Cornejo | R | 24 | L 3-13 | @ SEA | 21 | 40 | L | 0.2 | 7 | 9 | 3 | 2 | 1 | 0 | 42 | 20 | 22 | 52% | 5-9 | 4.62 | 1.55 |
| 2003-07-31 | Wil Ledezma | L | 23 | L 0-4 | @ SEA | 5 | 5 | L | 4.0 | 6 | 4 | 4 | 1 | 6 | 4 | 104 | 52 | 52 | 50% | 3-5 | 4.57 | 1.49 |
| 2003-08-01 | Jeremy Bonderman | R | 21 | L 4-10 | @ MIN | 21 | 21 | L | 2.1 | 10 | 8 | 7 | 1 | 1 | 2 | 68 | 30 | 38 | 56% | 4-15 | 5.51 | 1.47 |
| 2003-08-02 | Mike Maroth | L | 26 | W 9-2 | @ MIN | 23 | 44 | W | 5.1 | 9 | 1 | 1 | 0 | 3 | 3 | 101 | 40 | 61 | 60% | 6-15 | 5.19 | 1.38 |
| 2003-08-03 | Matt Roney | R | 24 | L 2-7 | @ MIN | 9 | 9 | L | 2.0 | 6 | 5 | 5 | 1 | 4 | 3 | 69 | 31 | 38 | 55% | 1-7 | 5.08 | 1.45 |
| 2003-08-05 | Nate Cornejo | R | 24 | W 2-7 | vs OAK | 22 | 41 | L | 4.1 | 8 | 6 | 6 | 0 | 2 | 0 | 95 | 38 | 57 | 60% | 5-10 | 4.87 | 1.57 |
| 2003-08-06 | Wil Ledezma | L | 23 | W 3-9 | vs OAK | 6 | 6 | L | 5.0 | 7 | 4 | 4 | 2 | 3 | 1 | 96 | 39 | 57 | 59% | 3-6 | 4.76 | 1.53 |
| 2003-08-07 | Jeremy Bonderman | R | 21 | L 3-2 | vs OAK | 22 | 22 | W | 5.0 | 3 | 2 | 1 | 1 | 6 | 3 | 94 | 47 | 47 | 50% | 5-15 | 5.36 | 1.49 |
| 2003-08-08 | Mike Maroth | L | 26 | W 3-4 | vs MIN | 24 | 45 | L | 8.0 | 7 | 4 | 3 | 1 | 1 | 2 | 116 | 40 | 76 | 66% | 6-16 | 5.09 | 1.36 |
| 2003-08-09 | Matt Roney | R | 24 | W 4-8 | vs MIN | 10 | 10 | - | 5.0 | 3 | 2 | 2 | 0 | 3 | 1 | 63 | 26 | 37 | 59% | 1-7 | 4.99 | 1.43 |
| 2003-08-10 | Nate Cornejo | R | 24 | W 3-4 | vs MIN | 23 | 42 | L | 9.0 | 9 | 4 | 4 | 0 | 3 | 3 | 124 | 42 | 82 | 66% | 5-11 | 4.81 | 1.55 |
| 2003-08-11 | Wil Ledezma | L | 23 | L 3-9 | @ TEX | 7 | 7 | - | 1.0 | 0 | 1 | 1 | 0 | 2 | 1 | 26 | 14 | 12 | 46% | 3-6 | 4.82 | 1.54 |
| 2003-08-12 | Jeremy Bonderman | R | 21 | W 7-4 | @ TEX | 23 | 23 | W | 7.0 | 4 | 3 | 1 | 0 | 3 | 2 | 95 | 40 | 55 | 58% | 6-15 | 5.13 | 1.46 |
| 2003-08-13 | Mike Maroth | L | 26 | L 3-7 | @ TEX | 25 | 46 | L | 5.0 | 8 | 6 | 6 | 2 | 0 | 1 | 97 | 39 | 58 | 60% | 6-17 | 5.28 | 1.37 |
| 2003-08-14 | Matt Roney | R | 24 | L 3-6 | @ TEX | 11 | 11 | L | 2.0 | 5 | 5 | 3 | 1 | 2 | 1 | 64 | 28 | 36 | 56% | 1-8 | 5.19 | 1.48 |
| 2003-08-15 | Nate Cornejo | R | 24 | L 1-3 | @ ANA | 24 | 43 | L | 7.0 | 6 | 2 | 2 | 0 | 3 | 2 | 102 | 36 | 66 | 65% | 5-12 | 4.70 | 1.54 |
| 2003-08-16 | Wil Ledezma | L | 23 | L 7-11 | @ ANA | 8 | 8 | L | 4.1 | 6 | 6 | 6 | 0 | 1 | 3 | 81 | 28 | 53 | 65% | 3-7 | 5.28 | 1.55 |
| 2003-08-17 | Jeremy Bonderman | R | 21 | L 6-11 | @ ANA | 24 | 24 | L | 5.0 | 8 | 4 | 4 | 2 | 1 | 1 | 93 | 38 | 55 | 59% | 6-16 | 5.21 | 1.47 |
| 2003-08-18 | Nate Robertson | R | 26 | W 2-4 | vs TEX | 1 | 2 | - | 8.1 | 8 | 2 | 2 | 1 | 0 | 8 | 109 | 34 | 75 | 69% | 0-0 | 2.25 | 1.00 |
| 2003-08-19 | Mike Maroth | L | 26 | W 4-5 | vs TEX | 26 | 47 | L | 6.1 | 7 | 4 | 3 | 1 | 2 | 5 | 106 | 35 | 71 | 67% | 6-18 | 5.25 | 1.37 |
| 2003-08-20 | Nate Cornejo | R | 24 | W 0-6 | vs TEX | 25 | 44 | L | 6.0 | 7 | 4 | 4 | 1 | 0 | 2 | 101 | 39 | 62 | 61% | 5-13 | 4.75 | 1.52 |
| 2003-08-21 | Shane Loux | R | 24 | W 7-10 | vs ANA | 1 | 4 | - | 5.0 | 8 | 4 | 4 | 1 | 2 | 1 | 80 | 26 | 54 | 68% | 0-0 | 7.20 | 1.65 |
| 2003-08-22 | Jeremy Bonderman | R | 21 | W 5-6 | vs ANA | 25 | 25 | L | 7.0 | 7 | 6 | 5 | 2 | 3 | 6 | 96 | 30 | 66 | 69% | 6-17 | 5.27 | 1.47 |
| 2003-08-23 | Nate Robertson | R | 26 | W 8-14 | vs ANA | 2 | 3 | - | 6.0 | 6 | 3 | 3 | 0 | 3 | 5 | 96 | 37 | 59 | 61% | 0-0 | 3.21 | 1.21 |
| 2003-08-24 | Mike Maroth | L | 26 | L 10-9 | vs ANA | 27 | 48 | - | 5.0 | 8 | 6 | 5 | 1 | 1 | 2 | 75 | 29 | 46 | 61% | 6-18 | 5.37 | 1.39 |
| 2003-08-26 | Nate Cornejo | R | 24 | W 5-4 | @ CLE | 26 | 45 | W | 7.1 | 9 | 4 | 4 | 0 | 1 | 0 | 104 | 47 | 57 | 55% | 6-13 | 4.77 | 1.52 |
| 2003-08-27 | Shane Loux | R | 24 | L 7-9 | @ CLE | 2 | 5 | - | 2.0 | 2 | 1 | 1 | 0 | 1 | 0 | 26 | 14 | 12 | 46% | 0-0 | 6.95 | 1.64 |
| 2003-08-28 | Jeremy Bonderman | R | 21 | L 3-8 | @ CLE | 26 | 26 | L | 4.2 | 9 | 7 | 5 | 3 | 1 | 1 | 67 | 25 | 42 | 63% | 6-18 | 5.44 | 1.50 |
| 2003-08-29 | Nate Robertson | R | 26 | L 8-4 | vs CHA | 3 | 4 | W | 5.0 | 9 | 3 | 3 | 1 | 3 | 1 | 108 | 44 | 64 | 59% | 1-0 | 3.79 | 1.53 |
| 2003-08-30 | Mike Maroth | L | 26 | W 2-5 | vs CHA | 28 | 49 | L | 6.2 | 8 | 5 | 5 | 2 | 2 | 2 | 112 | 48 | 64 | 57% | 6-19 | 5.41 | 1.39 |
| 2003-08-31 | Nate Cornejo | R | 24 | W 1-6 | vs CHA | 27 | 46 | L | 7.2 | 6 | 2 | 2 | 1 | 5 | 3 | 108 | 48 | 60 | 56% | 6-14 | 4.64 | 1.51 |
| 2003-09-01 | Chris Mears | R | 26 | W 4-7 | vs CLE | 1 | 1 | - | 4.0 | 7 | 3 | 3 | 1 | 0 | 1 | 66 | 26 | 40 | 61% | 0-1 | 4.67 | 1.48 |
| 2003-09-02 | Jeremy Bonderman | R | 21 | L 8-6 | vs CLE | 27 | 27 | - | 3.2 | 7 | 6 | 6 | 3 | 3 | 1 | 62 | 25 | 37 | 60% | 6-18 | 5.66 | 1.53 |
| 2003-09-03 | Nate Robertson | R | 26 | L 6-5 | vs CLE | 4 | 5 | - | 5.0 | 9 | 4 | 4 | 1 | 3 | 4 | 100 | 40 | 60 | 60% | 1-0 | 4.50 | 1.71 |
| 2003-09-04 | Gary Knotts | R | 27 | L 2-1 | vs CLE | 14 | 15 | W | 6.2 | 6 | 1 | 1 | 0 | 2 | 3 | 101 | 37 | 64 | 63% | 3-5 | 4.72 | 1.50 |
| 2003-09-05 | Mike Maroth | L | 26 | L 6-8 | @ TOR | 29 | 50 | L | 3.0 | 9 | 8 | 8 | 2 | 2 | 2 | 65 | 24 | 41 | 63% | 6-20 | 5.74 | 1.43 |
| 2003-09-06 | Nate Cornejo | R | 24 | L 0-1 | @ TOR | 28 | 47 | - | 9.0 | 5 | 0 | 0 | 0 | 2 | 2 | 114 | 44 | 70 | 61% | 6-14 | 4.39 | 1.47 |
| 2003-09-07 | Chris Mears | R | 26 | L 0-8 | @ TOR | 2 | 2 | L | 2.0 | 6 | 5 | 5 | 2 | 0 | 1 | 51 | 23 | 28 | 55% | 0-2 | 5.90 | 1.59 |
| 2003-09-09 | Nate Robertson | R | 26 | L 2-4 | @ NYA | 5 | 6 | - | 6.0 | 5 | 2 | 2 | 0 | 3 | 5 | 103 | 37 | 66 | 64% | 1-0 | 4.20 | 1.63 |
| 2003-09-10 | Gary Knotts | R | 27 | L 5-15 | @ NYA | 15 | 16 | L | 3.1 | 8 | 10 | 8 | 2 | 3 | 4 | 84 | 34 | 50 | 60% | 3-6 | 5.40 | 1.58 |
| 2003-09-11 | Nate Cornejo | R | 24 | L 2-5 | @ NYA | 29 | 48 | L | 8.0 | 11 | 5 | 5 | 2 | 2 | 3 | 122 | 49 | 73 | 60% | 6-15 | 4.45 | 1.48 |
| 2003-09-12 | Mike Maroth | L | 26 | L 3-0 | vs KCA | 30 | 51 | W | 6.0 | 5 | 0 | 0 | 0 | 2 | 4 | 96 | 40 | 56 | 58% | 7-20 | 5.54 | 1.42 |
| 2003-09-13 | Chris Mears | R | 26 | W 0-7 | vs KCA | 3 | 3 | L | 4.1 | 6 | 4 | 4 | 0 | 2 | 3 | 83 | 35 | 48 | 58% | 0-3 | 6.09 | 1.59 |
| 2003-09-14 | Nate Robertson | R | 26 | W 2-7 | vs KCA | 6 | 7 | L | 2.1 | 7 | 6 | 6 | 1 | 4 | 1 | 52 | 26 | 26 | 50% | 1-1 | 5.45 | 1.82 |
| 2003-09-15 | Gary Knotts | R | 27 | W 4-10 | vs KCA | 16 | 17 | L | 2.2 | 4 | 4 | 4 | 1 | 2 | 3 | 65 | 27 | 38 | 58% | 3-7 | 5.63 | 1.59 |
| 2003-09-16 | Nate Cornejo | R | 24 | W 6-9 | vs TOR | 30 | 49 | L | 6.1 | 8 | 6 | 5 | 1 | 1 | 2 | 89 | 29 | 60 | 67% | 6-16 | 4.55 | 1.48 |
| 2003-09-17 | Shane Loux | R | 24 | W 0-6 | vs TOR | 3 | 6 | L | 3.1 | 7 | 6 | 6 | 1 | 2 | 0 | 63 | 30 | 33 | 52% | 0-1 | 8.28 | 1.80 |
| 2003-09-18 | Mike Maroth | L | 26 | W 6-10 | vs TOR | 31 | 52 | L | 5.2 | 8 | 7 | 7 | 1 | 2 | 5 | 108 | 38 | 70 | 65% | 7-21 | 5.74 | 1.43 |
| 2003-09-19 | Jeremy Bonderman | R | 21 | L 2-6 | @ MIN | 28 | 28 | L | 3.1 | 10 | 5 | 5 | 0 | 1 | 2 | 60 | 20 | 40 | 67% | 6-19 | 5.66 | 1.55 |
| 2003-09-20 | Nate Robertson | R | 26 | L 3-7 | @ MIN | 7 | 8 | L | 5.0 | 6 | 6 | 6 | 2 | 4 | 4 | 92 | 40 | 52 | 57% | 1-2 | 6.16 | 1.84 |
| 2003-09-21 | Nate Cornejo | R | 24 | L 4-6 | @ MIN | 31 | 50 | L | 5.2 | 12 | 6 | 6 | 0 | 1 | 2 | 105 | 41 | 64 | 61% | 6-17 | 4.69 | 1.50 |
| 2003-09-22 | Gary Knotts | R | 27 | L 6-12 | @ KCA | 17 | 18 | L | 4.0 | 7 | 6 | 5 | 2 | 3 | 4 | 86 | 26 | 60 | 70% | 3-8 | 5.87 | 1.63 |
| 2003-09-23 | Mike Maroth | L | 26 | W 15-6 | @ KCA | 32 | 53 | W | 5.0 | 10 | 6 | 5 | 2 | 1 | 2 | 85 | 33 | 52 | 61% | 8-21 | 5.82 | 1.45 |
| 2003-09-24 | Shane Loux | R | 24 | W 4-3 | @ KCA | 4 | 7 | W | 5.0 | 3 | 1 | 1 | 0 | 1 | 1 | 66 | 26 | 40 | 61% | 1-1 | 7.20 | 1.63 |
| 2003-09-25 | Nate Robertson | R | 26 | L 5-4 | vs MIN | 8 | 9 | - | 7.0 | 5 | 1 | 1 | 0 | 3 | 5 | 97 | 38 | 59 | 61% | 1-2 | 5.40 | 1.73 |
| 2003-09-26 | Nate Cornejo | R | 24 | W 4-5 | vs MIN | 32 | 51 | - | 7.0 | 8 | 3 | 3 | 0 | 4 | 1 | 114 | 47 | 67 | 59% | 6-17 | 4.66 | 1.51 |
| 2003-09-27 | Gary Knotts | R | 27 | L 9-8 | vs MIN | 18 | 19 | - | 3.2 | 8 | 5 | 4 | 0 | 0 | 2 | 73 | 21 | 52 | 71% | 3-8 | 6.06 | 1.66 |
| 2003-09-28 | Mike Maroth | L | 26 | L 9-4 | vs MIN | 33 | 54 | W | 6.0 | 8 | 2 | 2 | 1 | 1 | 2 | 98 | 42 | 56 | 57% | 9-21 | 5.74 | 1.46 |