| East | W | L | Pct | GB |
| Atlanta | 101 | 61 | .623 | -- |
| Florida | 91 | 71 | .562 | 10.0 |
| Philadelphia | 86 | 76 | .531 | 15.0 |
| Montreal | 83 | 79 | .512 | 18.0 |
| NY Mets | 66 | 95 | .410 | 34.5 |
| 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 |
| 2003-03-31 | Tom Glavine | L | 37 | W 2-15 | vs CHN | 1 | 506 | L | 3.2 | 8 | 5 | 5 | 0 | 4 | 2 | 90 | 42 | 48 | 53% | 0-1 | 11.25 | 3.00 |
| 2003-04-02 | Al Leiter | L | 37 | L 4-1 | vs CHN | 1 | 297 | W | 6.0 | 4 | 1 | 1 | 0 | 3 | 3 | 97 | 42 | 55 | 57% | 1-0 | 1.50 | 1.17 |
| 2003-04-03 | Steve Trachsel | R | 32 | W 3-6 | vs CHN | 1 | 279 | L | 5.0 | 9 | 5 | 5 | 0 | 2 | 1 | 91 | 40 | 51 | 56% | 0-1 | 9.00 | 2.20 |
| 2003-04-04 | David Cone | R | 40 | L 4-0 | vs MON | 1 | 416 | W | 5.0 | 2 | 0 | 0 | 0 | 3 | 5 | 84 | 33 | 51 | 61% | 1-0 | 0.00 | 1.00 |
| 2003-04-05 | Tom Glavine | L | 37 | L 3-1 | vs MON | 2 | 507 | W | 5.2 | 5 | 1 | 1 | 0 | 0 | 5 | 95 | 33 | 62 | 65% | 1-1 | 6.00 | 1.89 |
| 2003-04-06 | Jae-Wong Seo | R | 26 | W 5-8 | vs MON | 1 | 1 | - | 4.2 | 10 | 3 | 3 | 0 | 0 | 2 | 80 | 27 | 53 | 66% | 0-0 | 5.40 | 2.00 |
| 2003-04-08 | Al Leiter | L | 37 | W 4-2 | @ FLO | 2 | 298 | W | 6.2 | 6 | 2 | 2 | 0 | 5 | 4 | 111 | 49 | 62 | 56% | 2-0 | 2.08 | 1.38 |
| 2003-04-09 | Steve Trachsel | R | 32 | L 2-3 | @ FLO | 2 | 280 | - | 6.0 | 6 | 1 | 1 | 1 | 3 | 4 | 107 | 40 | 67 | 63% | 0-1 | 4.91 | 1.82 |
| 2003-04-10 | Tom Glavine | L | 37 | L 3-4 | @ FLO | 3 | 508 | - | 6.0 | 5 | 0 | 0 | 0 | 2 | 3 | 96 | 47 | 49 | 51% | 1-1 | 3.60 | 1.60 |
| 2003-04-11 | David Cone | R | 40 | L 0-10 | @ MON | 2 | 417 | L | 4.0 | 8 | 7 | 7 | 2 | 3 | 4 | 87 | 37 | 50 | 57% | 1-1 | 7.00 | 1.78 |
| 2003-04-12 | Jae-Wong Seo | R | 26 | L 4-5 | @ MON | 2 | 2 | L | 5.2 | 9 | 5 | 3 | 1 | 0 | 4 | 93 | 28 | 65 | 70% | 0-1 | 5.40 | 1.90 |
| 2003-04-13 | Al Leiter | L | 37 | L 1-2 | @ MON | 3 | 299 | - | 6.0 | 3 | 0 | 0 | 0 | 4 | 1 | 107 | 48 | 59 | 55% | 2-0 | 1.42 | 1.32 |
| 2003-04-14 | Steve Trachsel | R | 32 | L 3-5 | @ MON | 3 | 281 | - | 6.0 | 5 | 3 | 3 | 1 | 1 | 3 | 95 | 37 | 58 | 61% | 0-1 | 4.76 | 1.53 |
| 2003-04-15 | Tom Glavine | L | 37 | W 3-1 | @ PIT | 4 | 509 | W | 6.1 | 3 | 1 | 1 | 0 | 3 | 5 | 102 | 43 | 59 | 58% | 2-1 | 2.86 | 1.36 |
| 2003-04-16 | David Cone | R | 40 | L 3-6 | @ PIT | 3 | 418 | L | 5.0 | 6 | 3 | 3 | 1 | 2 | 3 | 98 | 40 | 58 | 59% | 1-2 | 6.43 | 1.71 |
| 2003-04-17 | Jae-Wong Seo | R | 26 | W 7-2 | @ PIT | 3 | 3 | W | 7.0 | 5 | 0 | 0 | 0 | 0 | 2 | 104 | 36 | 68 | 65% | 1-1 | 3.18 | 1.41 |
| 2003-04-18 | Al Leiter | L | 37 | L 6-3 | vs FLO | 4 | 300 | - | 6.0 | 7 | 3 | 3 | 0 | 2 | 9 | 112 | 47 | 65 | 58% | 2-0 | 2.16 | 1.36 |
| 2003-04-19 | Steve Trachsel | R | 32 | W 5-6 | vs FLO | 4 | 282 | - | 5.0 | 7 | 4 | 3 | 0 | 3 | 2 | 109 | 49 | 60 | 55% | 0-1 | 4.91 | 1.64 |
| 2003-04-20 | Tom Glavine | L | 37 | L 7-4 | vs FLO | 5 | 510 | W | 7.0 | 8 | 3 | 3 | 1 | 2 | 1 | 102 | 38 | 64 | 63% | 3-1 | 3.10 | 1.38 |
| 2003-04-22 | David Cone | R | 40 | W 2-6 | vs HOU | 4 | 419 | L | 2.0 | 3 | 2 | 2 | 0 | 3 | 1 | 51 | 25 | 26 | 51% | 1-3 | 6.75 | 1.88 |
| 2003-04-23 | Al Leiter | L | 37 | L 4-2 | vs HOU | 5 | 301 | W | 6.0 | 7 | 2 | 2 | 0 | 3 | 5 | 108 | 43 | 65 | 60% | 3-0 | 2.32 | 1.42 |
| 2003-04-24 | Pedro Astacio | R | 33 | L 7-4 | vs HOU | 1 | 297 | W | 6.0 | 4 | 2 | 2 | 0 | 1 | 4 | 85 | 29 | 56 | 66% | 1-0 | 3.00 | 0.83 |
| 2003-04-25 | Steve Trachsel | R | 32 | L 4-3 | vs ARI | 5 | 283 | - | 6.0 | 9 | 3 | 3 | 1 | 2 | 5 | 108 | 41 | 67 | 62% | 0-1 | 4.82 | 1.68 |
| 2003-04-27 | Tom Glavine | L | 37 | W 1-6 | vs ARI | 6 | 511 | L | 6.1 | 7 | 6 | 4 | 1 | 2 | 3 | 99 | 38 | 61 | 62% | 3-2 | 3.60 | 1.40 |
| 2003-04-27 | Jae-Wong Seo | R | 26 | W 3-7 | vs ARI | 4 | 4 | L | 6.0 | 7 | 3 | 0 | 0 | 1 | 4 | 98 | 35 | 63 | 64% | 1-2 | 3.21 | 1.43 |
| 2003-04-29 | Al Leiter | L | 38 | L 3-13 | @ SLN | 6 | 302 | L | 6.0 | 9 | 5 | 5 | 1 | 0 | 5 | 117 | 47 | 70 | 60% | 3-1 | 3.16 | 1.43 |
| 2003-04-30 | Pedro Astacio | R | 33 | L 4-13 | @ SLN | 2 | 298 | L | 4.0 | 9 | 9 | 9 | 4 | 2 | 1 | 79 | 30 | 49 | 62% | 1-1 | 9.90 | 1.60 |
| 2003-05-01 | Steve Trachsel | R | 32 | L 5-6 | @ SLN | 6 | 284 | - | 5.0 | 8 | 5 | 5 | 0 | 0 | 2 | 90 | 30 | 60 | 67% | 0-1 | 5.45 | 1.67 |
| 2003-05-02 | Tom Glavine | L | 37 | W 9-3 | @ MIL | 7 | 512 | W | 7.0 | 8 | 3 | 3 | 2 | 0 | 3 | 83 | 33 | 50 | 60% | 4-2 | 3.64 | 1.36 |
| 2003-05-03 | Jae-Wong Seo | R | 26 | L 2-3 | @ MIL | 5 | 5 | - | 6.0 | 2 | 2 | 2 | 1 | 2 | 6 | 96 | 38 | 58 | 60% | 1-2 | 3.18 | 1.29 |
| 2003-05-04 | Al Leiter | L | 38 | W 5-3 | @ MIL | 7 | 303 | W | 6.0 | 4 | 3 | 3 | 1 | 3 | 4 | 90 | 37 | 53 | 59% | 4-1 | 3.35 | 1.40 |
| 2003-05-06 | Pedro Astacio | R | 33 | L 3-2 | vs LAN | 3 | 299 | W | 6.0 | 4 | 2 | 2 | 0 | 3 | 5 | 88 | 38 | 50 | 57% | 2-1 | 7.31 | 1.44 |
| 2003-05-07 | Steve Trachsel | R | 33 | W 1-2 | vs LAN | 7 | 285 | L | 7.0 | 5 | 2 | 2 | 0 | 2 | 4 | 108 | 39 | 69 | 64% | 0-2 | 4.95 | 1.55 |
| 2003-05-08 | Tom Glavine | L | 37 | W 1-6 | vs LAN | 8 | 513 | L | 7.0 | 7 | 3 | 3 | 0 | 3 | 2 | 98 | 42 | 56 | 57% | 4-3 | 3.67 | 1.37 |
| 2003-05-09 | Jae-Wong Seo | R | 26 | W 4-5 | vs SDN | 6 | 6 | - | 5.0 | 6 | 3 | 3 | 0 | 3 | 4 | 92 | 36 | 56 | 61% | 1-2 | 3.46 | 1.36 |
| 2003-05-10 | Al Leiter | L | 38 | L 4-2 | vs SDN | 8 | 304 | - | 7.0 | 4 | 2 | 2 | 1 | 4 | 3 | 117 | 47 | 70 | 60% | 4-1 | 3.24 | 1.36 |
| 2003-05-11 | Pedro Astacio | R | 33 | L 3-2 | vs SDN | 4 | 300 | - | 6.0 | 7 | 2 | 2 | 0 | 3 | 3 | 99 | 38 | 61 | 62% | 2-1 | 6.14 | 1.50 |
| 2003-05-12 | Steve Trachsel | R | 33 | W 9-6 | @ COL | 8 | 286 | W | 6.0 | 7 | 4 | 4 | 1 | 3 | 3 | 108 | 43 | 65 | 60% | 1-2 | 5.09 | 1.57 |
| 2003-05-13 | Tom Glavine | L | 37 | L 8-9 | @ COL | 9 | 514 | - | 6.0 | 9 | 3 | 3 | 0 | 3 | 4 | 101 | 39 | 62 | 61% | 4-3 | 3.76 | 1.44 |
| 2003-05-14 | Jae-Wong Seo | R | 26 | L 5-6 | @ COL | 7 | 7 | - | 7.0 | 10 | 5 | 4 | 0 | 3 | 2 | 121 | 51 | 70 | 58% | 1-2 | 3.72 | 1.43 |
| 2003-05-15 | Al Leiter | L | 38 | L 3-11 | @ SFN | 9 | 305 | L | 4.2 | 13 | 10 | 10 | 2 | 1 | 3 | 95 | 41 | 54 | 57% | 4-2 | 4.67 | 1.52 |
| 2003-05-16 | Pedro Astacio | R | 33 | L 5-7 | @ SFN | 5 | 301 | - | 4.2 | 10 | 5 | 5 | 1 | 2 | 3 | 101 | 43 | 58 | 57% | 2-1 | 6.67 | 1.67 |
| 2003-05-17 | Steve Trachsel | R | 33 | W 5-1 | @ SFN | 9 | 287 | W | 8.0 | 4 | 1 | 1 | 0 | 1 | 3 | 97 | 42 | 55 | 57% | 2-2 | 4.50 | 1.43 |
| 2003-05-18 | Tom Glavine | L | 37 | W 5-1 | @ SFN | 10 | 515 | W | 8.1 | 6 | 1 | 1 | 1 | 1 | 4 | 89 | 32 | 57 | 64% | 5-3 | 3.43 | 1.37 |
| 2003-05-20 | Jae-Wong Seo | R | 26 | W 7-11 | vs PHI | 8 | 8 | - | 6.0 | 5 | 1 | 1 | 1 | 2 | 4 | 90 | 33 | 57 | 63% | 1-2 | 3.46 | 1.40 |
| 2003-05-21 | Al Leiter | L | 38 | L 5-4 | vs PHI | 10 | 306 | - | 6.0 | 5 | 3 | 3 | 0 | 6 | 5 | 120 | 59 | 61 | 51% | 4-2 | 4.65 | 1.55 |
| 2003-05-22 | Pedro Astacio | R | 33 | L 6-3 | vs PHI | 6 | 302 | W | 6.0 | 5 | 3 | 3 | 0 | 4 | 3 | 113 | 52 | 61 | 54% | 3-1 | 6.27 | 1.64 |
| 2003-05-23 | Steve Trachsel | R | 33 | W 6-5 | @ ATL | 10 | 288 | W | 5.2 | 6 | 4 | 4 | 1 | 4 | 2 | 92 | 41 | 51 | 55% | 3-2 | 4.65 | 1.45 |
| 2003-05-24 | Tom Glavine | L | 37 | L 4-10 | @ ATL | 11 | 516 | L | 3.1 | 8 | 6 | 6 | 2 | 2 | 0 | 68 | 28 | 40 | 59% | 5-4 | 4.03 | 1.43 |
| 2003-05-25 | Jae-Wong Seo | R | 26 | L 1-3 | @ ATL | 9 | 9 | - | 7.0 | 3 | 1 | 1 | 1 | 0 | 2 | 82 | 26 | 56 | 68% | 1-2 | 3.20 | 1.29 |
| 2003-05-27 | Al Leiter | L | 38 | W 4-2 | @ PHI | 11 | 307 | W | 6.0 | 2 | 0 | 0 | 0 | 6 | 8 | 134 | 64 | 70 | 52% | 5-2 | 4.23 | 1.53 |
| 2003-05-28 | Pedro Astacio | R | 33 | L 3-11 | @ PHI | 7 | 303 | L | 4.0 | 8 | 7 | 7 | 3 | 3 | 1 | 66 | 25 | 41 | 62% | 3-2 | 7.30 | 1.76 |
| 2003-05-29 | Steve Trachsel | R | 33 | W 5-0 | @ PHI | 11 | 289 | W | 6.2 | 5 | 0 | 0 | 0 | 3 | 5 | 110 | 49 | 61 | 55% | 4-2 | 4.23 | 1.44 |
| 2003-05-30 | Tom Glavine | L | 37 | W 2-5 | vs ATL | 12 | 517 | L | 7.0 | 9 | 5 | 5 | 4 | 1 | 1 | 113 | 52 | 61 | 54% | 5-5 | 4.26 | 1.43 |
| 2003-05-31 | Jae-Wong Seo | R | 26 | L 4-2 | vs ATL | 10 | 10 | W | 8.0 | 6 | 2 | 2 | 0 | 1 | 0 | 111 | 40 | 71 | 64% | 2-2 | 3.09 | 1.24 |
| 2003-06-01 | Al Leiter | L | 38 | L 10-4 | vs ATL | 12 | 308 | W | 6.0 | 7 | 4 | 4 | 1 | 4 | 4 | 101 | 41 | 60 | 59% | 6-2 | 4.38 | 1.56 |
| 2003-06-05 | Steve Trachsel | R | 33 | W 7-8 | vs MIL | 12 | 290 | L | 4.0 | 10 | 7 | 7 | 4 | 0 | 4 | 82 | 30 | 52 | 63% | 4-3 | 4.89 | 1.50 |
| 2003-06-05 | Tom Glavine | L | 37 | W 3-5 | vs MIL | 13 | 518 | L | 1.0 | 4 | 5 | 5 | 0 | 4 | 0 | 51 | 26 | 25 | 49% | 5-6 | 4.80 | 1.52 |
| 2003-06-06 | Jae-Wong Seo | R | 26 | L 3-2 | vs SEA | 11 | 11 | W | 7.0 | 8 | 2 | 1 | 0 | 4 | 4 | 110 | 43 | 67 | 61% | 3-2 | 2.92 | 1.28 |
| 2003-06-08 | Al Leiter | L | 38 | W 1-13 | vs SEA | 13 | 309 | L | 2.0 | 9 | 8 | 8 | 0 | 3 | 2 | 56 | 25 | 31 | 55% | 6-3 | 5.23 | 1.68 |
| 2003-06-08 | Mike Bacsik | L | 26 | W 0-7 | vs SEA | 1 | 10 | L | 5.0 | 11 | 5 | 4 | 0 | 1 | 2 | 94 | 34 | 60 | 64% | 0-1 | 14.63 | 2.63 |
| 2003-06-10 | Steve Trachsel | R | 33 | L 7-9 | @ TEX | 13 | 291 | L | 3.1 | 8 | 7 | 6 | 2 | 3 | 1 | 94 | 38 | 56 | 60% | 4-4 | 5.35 | 1.57 |
| 2003-06-11 | Jae-Wong Seo | R | 26 | W 8-2 | @ TEX | 12 | 12 | W | 7.0 | 8 | 2 | 2 | 0 | 1 | 6 | 102 | 33 | 69 | 68% | 4-2 | 2.89 | 1.28 |
| 2003-06-12 | Al Leiter | L | 38 | W 11-0 | @ TEX | 14 | 310 | W | 6.0 | 8 | 0 | 0 | 0 | 2 | 6 | 111 | 40 | 71 | 64% | 7-3 | 4.84 | 1.68 |
| 2003-06-13 | Mike Bacsik | L | 26 | W 7-3 | @ ANA | 2 | 11 | W | 5.0 | 6 | 2 | 2 | 1 | 0 | 3 | 79 | 27 | 52 | 66% | 1-1 | 10.38 | 2.08 |
| 2003-06-14 | Jason Roach | R | 27 | L 3-13 | @ ANA | 1 | 1 | L | 3.0 | 6 | 7 | 7 | 2 | 2 | 0 | 58 | 21 | 37 | 64% | 0-1 | 21.00 | 2.67 |
| 2003-06-15 | Steve Trachsel | R | 33 | W 8-0 | @ ANA | 14 | 292 | W | 9.0 | 1 | 0 | 0 | 0 | 4 | 1 | 123 | 52 | 71 | 58% | 5-4 | 4.77 | 1.46 |
| 2003-06-16 | Tom Glavine | L | 37 | L 0-1 | @ FLO | 14 | 519 | L | 7.0 | 4 | 1 | 1 | 1 | 3 | 4 | 104 | 43 | 61 | 59% | 5-7 | 4.50 | 1.48 |
| 2003-06-17 | Jae-Wong Seo | R | 26 | W 5-0 | @ FLO | 13 | 13 | W | 6.2 | 1 | 0 | 0 | 0 | 0 | 4 | 73 | 19 | 54 | 74% | 5-2 | 2.66 | 1.19 |
| 2003-06-18 | Al Leiter | L | 38 | W 10-5 | @ FLO | 15 | 311 | W | 5.0 | 6 | 5 | 5 | 1 | 6 | 2 | 103 | 51 | 52 | 50% | 8-3 | 5.08 | 1.72 |
| 2003-06-19 | Mike Bacsik | L | 26 | L 1-5 | @ FLO | 3 | 12 | L | 4.2 | 7 | 5 | 5 | 2 | 2 | 3 | 71 | 29 | 42 | 59% | 1-2 | 10.00 | 2.00 |
| 2003-06-20 | Steve Trachsel | R | 33 | W 0-5 | vs NYA | 15 | 293 | L | 7.0 | 5 | 2 | 2 | 2 | 5 | 5 | 113 | 46 | 67 | 59% | 5-5 | 4.60 | 1.46 |
| 2003-06-22 | Tom Glavine | L | 37 | W 3-7 | vs NYA | 15 | 520 | - | 6.0 | 5 | 1 | 1 | 0 | 2 | 2 | 63 | 29 | 34 | 54% | 5-7 | 4.30 | 1.45 |
| 2003-06-24 | Al Leiter | L | 38 | W 4-8 | vs FLO | 16 | 312 | L | 5.2 | 8 | 8 | 7 | 1 | 5 | 4 | 112 | 47 | 65 | 58% | 8-4 | 5.44 | 1.75 |
| 2003-06-25 | Steve Trachsel | R | 33 | L 6-3 | vs FLO | 16 | 294 | W | 7.0 | 8 | 3 | 3 | 2 | 2 | 5 | 102 | 36 | 66 | 65% | 6-5 | 4.55 | 1.45 |
| 2003-06-26 | Aaron Heilman | R | 25 | W 1-6 | vs FLO | 1 | 1 | L | 6.0 | 6 | 5 | 1 | 0 | 2 | 2 | 93 | 34 | 59 | 63% | 0-1 | 1.50 | 1.33 |
| 2003-06-27 | Jae-Wong Seo | R | 26 | L 4-6 | @ NYA | 14 | 14 | L | 5.1 | 9 | 6 | 6 | 0 | 1 | 3 | 86 | 32 | 54 | 63% | 5-3 | 3.10 | 1.24 |
| 2003-06-28 | Jeremy Griffiths | R | 25 | L 1-7 | @ NYA | 1 | 1 | L | 3.0 | 7 | 5 | 5 | 1 | 3 | 1 | 70 | 28 | 42 | 60% | 0-1 | 9.00 | 2.20 |
| 2003-06-28 | Tom Glavine | L | 37 | W 8-9 | vs NYA | 16 | 521 | L | 4.1 | 10 | 8 | 8 | 2 | 2 | 3 | 92 | 43 | 49 | 53% | 5-8 | 4.89 | 1.52 |
| 2003-06-29 | Al Leiter | L | 38 | L 3-5 | @ NYA | 17 | 313 | L | 6.0 | 7 | 5 | 5 | 3 | 6 | 3 | 118 | 62 | 56 | 47% | 8-5 | 5.57 | 1.77 |
| 2003-06-30 | Steve Trachsel | R | 33 | L 3-1 | vs MON | 17 | 295 | W | 7.0 | 5 | 1 | 1 | 0 | 2 | 3 | 106 | 40 | 66 | 62% | 7-5 | 4.33 | 1.42 |
| 2003-07-01 | Aaron Heilman | R | 25 | L 7-6 | vs MON | 2 | 2 | - | 7.0 | 5 | 3 | 3 | 2 | 1 | 2 | 105 | 36 | 69 | 66% | 0-1 | 2.77 | 1.08 |
| 2003-07-02 | Jae-Wong Seo | R | 26 | W 4-11 | vs MON | 15 | 15 | L | 3.1 | 6 | 5 | 4 | 0 | 2 | 1 | 60 | 21 | 39 | 65% | 5-4 | 3.34 | 1.27 |
| 2003-07-04 | Tom Glavine | L | 37 | W 7-2 | @ CIN | 17 | 522 | W | 7.0 | 4 | 1 | 1 | 1 | 1 | 5 | 99 | 38 | 61 | 62% | 6-8 | 4.64 | 1.46 |
| 2003-07-05 | Steve Trachsel | R | 33 | W 6-2 | @ CIN | 18 | 296 | W | 6.0 | 4 | 0 | 0 | 0 | 1 | 2 | 79 | 30 | 49 | 62% | 8-5 | 4.09 | 1.39 |
| 2003-07-06 | Aaron Heilman | R | 25 | W 7-5 | @ CIN | 3 | 3 | - | 4.0 | 6 | 5 | 5 | 2 | 4 | 3 | 94 | 45 | 49 | 52% | 0-1 | 4.76 | 1.41 |
| 2003-07-07 | Jae-Wong Seo | R | 26 | W 3-7 | vs ATL | 16 | 16 | L | 6.0 | 8 | 6 | 6 | 2 | 0 | 6 | 93 | 30 | 63 | 68% | 5-5 | 3.67 | 1.27 |
| 2003-07-08 | Jason Roach | R | 27 | W 3-5 | vs ATL | 2 | 2 | L | 6.0 | 8 | 5 | 5 | 1 | 2 | 2 | 86 | 30 | 56 | 65% | 0-2 | 12.00 | 2.00 |
| 2003-07-09 | Tom Glavine | L | 37 | W 3-6 | vs ATL | 18 | 523 | L | 5.1 | 7 | 5 | 5 | 1 | 5 | 0 | 104 | 44 | 60 | 58% | 6-9 | 4.85 | 1.51 |
| 2003-07-10 | Steve Trachsel | R | 33 | W 2-7 | vs PHI | 19 | 297 | L | 1.2 | 8 | 7 | 7 | 3 | 2 | 4 | 56 | 25 | 31 | 55% | 8-6 | 4.62 | 1.47 |
| 2003-07-11 | Aaron Heilman | R | 25 | W 3-10 | vs PHI | 4 | 4 | L | 4.1 | 8 | 8 | 8 | 1 | 2 | 4 | 81 | 26 | 55 | 68% | 0-2 | 7.29 | 1.62 |
| 2003-07-12 | Jae-Wong Seo | R | 26 | W 2-4 | vs PHI | 17 | 17 | - | 6.0 | 7 | 2 | 2 | 1 | 2 | 4 | 88 | 26 | 62 | 70% | 5-5 | 3.63 | 1.28 |
| 2003-07-13 | Tom Glavine | L | 37 | L 4-3 | vs PHI | 19 | 524 | - | 6.0 | 8 | 2 | 2 | 0 | 2 | 2 | 105 | 43 | 62 | 59% | 6-9 | 4.75 | 1.52 |
| 2003-07-17 | Steve Trachsel | R | 33 | L 2-3 | @ ATL | 20 | 298 | - | 6.0 | 8 | 2 | 2 | 0 | 2 | 1 | 70 | 24 | 46 | 66% | 8-6 | 4.54 | 1.48 |
| 2003-07-18 | Jae-Wong Seo | R | 26 | L 4-11 | @ ATL | 18 | 18 | L | 4.0 | 5 | 5 | 4 | 0 | 3 | 2 | 68 | 28 | 40 | 59% | 5-6 | 3.82 | 1.31 |
| 2003-07-19 | Tom Glavine | L | 37 | L 4-7 | @ ATL | 20 | 525 | L | 4.1 | 9 | 7 | 7 | 1 | 3 | 2 | 95 | 40 | 55 | 58% | 6-10 | 5.09 | 1.56 |
| 2003-07-20 | Al Leiter | L | 38 | L 8-11 | @ ATL | 18 | 314 | - | 5.0 | 3 | 2 | 2 | 0 | 4 | 5 | 82 | 40 | 42 | 51% | 8-5 | 5.47 | 1.75 |
| 2003-07-21 | Aaron Heilman | R | 25 | W 8-6 | @ PHI | 5 | 5 | W | 5.0 | 7 | 4 | 4 | 1 | 3 | 4 | 108 | 44 | 64 | 59% | 1-2 | 7.27 | 1.69 |
| 2003-07-22 | Steve Trachsel | R | 33 | W 7-5 | @ PHI | 21 | 299 | W | 5.1 | 6 | 4 | 3 | 0 | 1 | 1 | 102 | 39 | 63 | 62% | 9-6 | 4.54 | 1.46 |
| 2003-07-23 | Jae-Wong Seo | R | 26 | L 2-5 | @ MON | 19 | 19 | L | 5.0 | 8 | 5 | 5 | 0 | 1 | 5 | 86 | 28 | 58 | 67% | 5-7 | 4.04 | 1.33 |
| 2003-07-24 | Tom Glavine | L | 37 | L 1-5 | @ MON | 21 | 526 | L | 6.0 | 8 | 4 | 4 | 1 | 2 | 3 | 97 | 36 | 61 | 63% | 6-11 | 5.13 | 1.56 |
| 2003-07-25 | Al Leiter | L | 38 | L 3-1 | vs CIN | 19 | 315 | W | 7.0 | 6 | 0 | 0 | 0 | 2 | 5 | 98 | 33 | 65 | 66% | 9-5 | 5.12 | 1.72 |
| 2003-07-26 | Aaron Heilman | R | 25 | W 3-8 | vs CIN | 6 | 6 | L | 5.2 | 8 | 6 | 6 | 0 | 2 | 5 | 98 | 35 | 63 | 64% | 1-3 | 7.59 | 1.69 |
| 2003-07-27 | Steve Trachsel | R | 33 | W 5-8 | vs CIN | 22 | 300 | L | 5.1 | 9 | 6 | 5 | 2 | 2 | 4 | 101 | 41 | 60 | 59% | 9-7 | 4.71 | 1.49 |
| 2003-07-28 | Jae-Wong Seo | R | 26 | W 2-4 | vs MIL | 20 | 20 | - | 7.0 | 5 | 2 | 2 | 1 | 4 | 5 | 99 | 40 | 59 | 60% | 5-7 | 3.96 | 1.33 |
| 2003-07-29 | Tom Glavine | L | 37 | W 3-6 | vs MIL | 22 | 527 | - | 1.0 | 2 | 0 | 0 | 0 | 0 | 0 | 18 | 7 | 11 | 61% | 6-11 | 5.09 | 1.57 |
| 2003-07-30 | Al Leiter | L | 38 | L 2-0 | vs MIL | 20 | 316 | W | 7.0 | 5 | 0 | 0 | 0 | 4 | 6 | 120 | 52 | 68 | 57% | 10-5 | 4.81 | 1.69 |
| 2003-07-31 | Aaron Heilman | R | 25 | W 3-4 | vs MIL | 7 | 7 | L | 5.2 | 6 | 2 | 2 | 0 | 6 | 7 | 109 | 46 | 63 | 58% | 1-4 | 6.87 | 1.74 |
| 2003-08-01 | Steve Trachsel | R | 33 | W 2-8 | vs SLN | 23 | 301 | - | 6.2 | 5 | 1 | 1 | 1 | 1 | 4 | 118 | 42 | 76 | 64% | 9-7 | 4.53 | 1.46 |
| 2003-08-02 | Jae-Wong Seo | R | 26 | W 9-10 | vs SLN | 21 | 21 | L | 4.0 | 7 | 7 | 7 | 3 | 2 | 2 | 65 | 24 | 41 | 63% | 5-8 | 4.33 | 1.36 |
| 2003-08-03 | Jeremy Griffiths | R | 25 | L 13-5 | vs SLN | 2 | 2 | W | 7.0 | 6 | 2 | 1 | 1 | 1 | 4 | 101 | 35 | 66 | 65% | 1-1 | 6.55 | 1.82 |
| 2003-08-05 | Al Leiter | L | 38 | W 10-1 | @ HOU | 21 | 317 | W | 6.0 | 5 | 1 | 1 | 0 | 4 | 6 | 120 | 45 | 75 | 63% | 11-5 | 4.65 | 1.68 |
| 2003-08-06 | Aaron Heilman | R | 25 | L 1-11 | @ HOU | 8 | 8 | L | 3.0 | 7 | 6 | 6 | 2 | 2 | 3 | 66 | 28 | 38 | 58% | 1-5 | 7.68 | 1.83 |
| 2003-08-07 | Steve Trachsel | R | 33 | W 5-4 | @ HOU | 24 | 302 | W | 5.0 | 6 | 3 | 3 | 1 | 5 | 1 | 93 | 44 | 49 | 53% | 10-7 | 4.56 | 1.49 |
| 2003-08-08 | Tom Glavine | L | 37 | W 3-1 | @ ARI | 23 | 528 | W | 6.0 | 4 | 1 | 1 | 0 | 2 | 2 | 81 | 35 | 46 | 57% | 7-11 | 4.92 | 1.54 |
| 2003-08-09 | Jae-Wong Seo | R | 26 | L 1-2 | @ ARI | 22 | 22 | - | 6.0 | 4 | 1 | 1 | 0 | 3 | 2 | 87 | 34 | 53 | 61% | 5-8 | 4.20 | 1.35 |
| 2003-08-10 | Al Leiter | L | 38 | L 4-7 | @ ARI | 22 | 318 | L | 5.0 | 5 | 4 | 3 | 0 | 2 | 4 | 105 | 44 | 61 | 58% | 11-6 | 4.68 | 1.67 |
| 2003-08-12 | Aaron Heilman | R | 25 | L 5-4 | vs SFN | 9 | 9 | W | 5.0 | 7 | 3 | 3 | 1 | 3 | 7 | 83 | 33 | 50 | 60% | 2-5 | 7.43 | 1.85 |
| 2003-08-13 | Steve Trachsel | R | 33 | L 9-2 | vs SFN | 25 | 303 | W | 7.2 | 8 | 2 | 2 | 0 | 2 | 4 | 103 | 38 | 65 | 63% | 11-7 | 4.47 | 1.48 |
| 2003-08-15 | Tom Glavine | L | 37 | L 5-0 | vs COL | 24 | 529 | W | 6.0 | 3 | 0 | 0 | 0 | 4 | 3 | 109 | 46 | 63 | 58% | 8-11 | 4.70 | 1.52 |
| 2003-08-16 | Jae-Wong Seo | R | 26 | L 13-4 | vs COL | 23 | 23 | W | 5.0 | 7 | 4 | 4 | 1 | 0 | 1 | 76 | 22 | 54 | 71% | 6-8 | 4.31 | 1.35 |
| 2003-08-17 | Al Leiter | L | 38 | L 6-4 | vs COL | 23 | 319 | W | 6.0 | 4 | 1 | 1 | 0 | 3 | 10 | 121 | 49 | 72 | 60% | 12-6 | 4.53 | 1.65 |
| 2003-08-18 | Steve Trachsel | R | 33 | L 8-0 | vs COL | 26 | 304 | W | 9.0 | 1 | 0 | 0 | 0 | 0 | 3 | 103 | 33 | 70 | 68% | 12-7 | 4.21 | 1.40 |
| 2003-08-19 | Tom Glavine | L | 37 | L 2-3 | @ SDN | 25 | 530 | - | 6.2 | 6 | 1 | 1 | 0 | 3 | 5 | 113 | 48 | 65 | 58% | 8-11 | 4.56 | 1.52 |
| 2003-08-20 | Aaron Heilman | R | 25 | L 1-2 | @ SDN | 10 | 10 | - | 6.0 | 2 | 1 | 1 | 1 | 5 | 3 | 102 | 45 | 57 | 56% | 2-5 | 6.75 | 1.77 |
| 2003-08-21 | Jae-Wong Seo | R | 26 | W 5-1 | @ SDN | 24 | 24 | W | 6.0 | 6 | 1 | 1 | 0 | 1 | 2 | 105 | 40 | 65 | 62% | 7-8 | 4.19 | 1.34 |
| 2003-08-22 | Al Leiter | L | 38 | L 1-2 | @ LAN | 24 | 320 | L | 6.0 | 6 | 2 | 2 | 0 | 3 | 5 | 117 | 43 | 74 | 63% | 12-7 | 4.47 | 1.64 |
| 2003-08-23 | Steve Trachsel | R | 33 | W 4-0 | @ LAN | 27 | 305 | W | 7.1 | 5 | 0 | 0 | 0 | 0 | 4 | 113 | 39 | 74 | 65% | 13-7 | 4.01 | 1.37 |
| 2003-08-24 | Tom Glavine | L | 37 | W 2-1 | @ LAN | 26 | 531 | W | 7.0 | 2 | 1 | 1 | 0 | 1 | 2 | 85 | 34 | 51 | 60% | 9-11 | 4.41 | 1.47 |
| 2003-08-26 | Jae-Wong Seo | R | 26 | W 6-5 | @ ATL | 25 | 25 | W | 5.0 | 4 | 2 | 2 | 1 | 0 | 5 | 92 | 36 | 56 | 61% | 8-8 | 4.17 | 1.32 |
| 2003-08-27 | Aaron Heilman | R | 25 | L 1-4 | @ ATL | 11 | 11 | L | 3.0 | 5 | 3 | 3 | 1 | 4 | 3 | 85 | 36 | 49 | 58% | 2-6 | 6.87 | 1.84 |
| 2003-08-28 | Al Leiter | L | 38 | W 3-1 | @ ATL | 25 | 321 | W | 7.0 | 2 | 0 | 0 | 0 | 1 | 6 | 114 | 46 | 68 | 60% | 13-7 | 4.25 | 1.58 |
| 2003-08-29 | Steve Trachsel | R | 33 | W 0-7 | vs PHI | 28 | 306 | L | 6.0 | 6 | 4 | 4 | 1 | 1 | 4 | 85 | 28 | 57 | 67% | 13-8 | 4.08 | 1.36 |
| 2003-08-30 | Tom Glavine | L | 37 | W 2-4 | vs PHI | 27 | 532 | L | 6.2 | 11 | 4 | 4 | 0 | 1 | 5 | 107 | 42 | 65 | 61% | 9-12 | 4.44 | 1.48 |
| 2003-08-31 | Jae-Wong Seo | R | 26 | W 1-4 | vs PHI | 26 | 26 | L | 6.0 | 4 | 4 | 4 | 1 | 1 | 4 | 101 | 34 | 67 | 66% | 8-9 | 4.24 | 1.31 |
| 2003-09-01 | Jeremy Griffiths | R | 25 | L 3-2 | vs ATL | 3 | 3 | - | 6.1 | 6 | 2 | 2 | 0 | 4 | 6 | 118 | 46 | 72 | 61% | 1-1 | 5.79 | 1.79 |
| 2003-09-02 | Al Leiter | L | 38 | L 3-1 | vs ATL | 26 | 322 | W | 7.0 | 5 | 1 | 0 | 0 | 2 | 3 | 123 | 51 | 72 | 59% | 14-7 | 4.06 | 1.56 |
| 2003-09-03 | Steve Trachsel | R | 33 | L 9-3 | vs ATL | 29 | 307 | W | 8.0 | 5 | 1 | 1 | 1 | 0 | 5 | 108 | 39 | 69 | 64% | 14-8 | 3.94 | 1.33 |
| 2003-09-04 | Tom Glavine | L | 37 | L 5-6 | @ PHI | 28 | 533 | - | 6.0 | 8 | 4 | 4 | 1 | 1 | 2 | 90 | 31 | 59 | 66% | 9-12 | 4.50 | 1.48 |
| 2003-09-05 | Jae-Wong Seo | R | 26 | L 0-1 | @ PHI | 27 | 27 | L | 7.1 | 3 | 1 | 1 | 0 | 4 | 4 | 117 | 47 | 70 | 60% | 8-10 | 4.12 | 1.29 |
| 2003-09-06 | Jeremy Griffiths | R | 25 | L 6-9 | @ PHI | 4 | 4 | L | 4.2 | 8 | 7 | 7 | 0 | 3 | 2 | 104 | 46 | 58 | 56% | 1-2 | 6.82 | 1.85 |
| 2003-09-07 | Al Leiter | L | 38 | L 4-5 | @ PHI | 27 | 323 | - | 6.0 | 4 | 2 | 2 | 1 | 1 | 6 | 114 | 36 | 78 | 68% | 14-7 | 4.02 | 1.53 |
| 2003-09-08 | Steve Trachsel | R | 33 | W 0-5 | vs FLO | 30 | 308 | L | 7.0 | 4 | 1 | 1 | 1 | 3 | 8 | 109 | 46 | 63 | 58% | 14-9 | 3.84 | 1.31 |
| 2003-09-09 | Tom Glavine | L | 37 | W 1-3 | vs FLO | 29 | 534 | - | 7.1 | 7 | 1 | 1 | 0 | 2 | 4 | 97 | 35 | 62 | 64% | 9-12 | 4.37 | 1.47 |
| 2003-09-10 | Jae-Wong Seo | R | 26 | W 3-7 | vs FLO | 28 | 28 | L | 5.0 | 7 | 4 | 1 | 1 | 1 | 2 | 88 | 24 | 64 | 73% | 8-11 | 4.05 | 1.30 |
| 2003-09-12 | Al Leiter | L | 38 | L 4-7 | @ MON | 28 | 324 | L | 5.2 | 10 | 7 | 7 | 1 | 3 | 2 | 111 | 41 | 70 | 63% | 14-8 | 4.25 | 1.55 |
| 2003-09-13 | Steve Trachsel | R | 33 | W 5-4 | @ MON | 31 | 309 | W | 6.0 | 8 | 4 | 4 | 0 | 1 | 2 | 114 | 47 | 67 | 59% | 15-9 | 3.91 | 1.32 |
| 2003-09-14 | Tom Glavine | L | 37 | L 3-7 | @ MON | 30 | 535 | L | 5.0 | 7 | 5 | 5 | 0 | 1 | 1 | 104 | 41 | 63 | 61% | 9-13 | 4.50 | 1.48 |
| 2003-09-15 | Jeremy Griffiths | R | 25 | L 1-4 | @ CHN | 5 | 5 | L | 4.0 | 6 | 4 | 3 | 0 | 0 | 5 | 76 | 26 | 50 | 66% | 1-3 | 6.81 | 1.81 |
| 2003-09-16 | Jae-Wong Seo | R | 26 | L 2-3 | @ CHN | 29 | 29 | L | 6.0 | 5 | 3 | 2 | 1 | 1 | 6 | 84 | 31 | 53 | 63% | 8-12 | 4.01 | 1.29 |
| 2003-09-17 | Al Leiter | L | 38 | L 0-2 | @ CHN | 29 | 325 | L | 7.0 | 4 | 2 | 2 | 2 | 1 | 4 | 103 | 37 | 66 | 64% | 14-9 | 4.19 | 1.52 |
| 2003-09-18 | Steve Trachsel | R | 33 | W 0-1 | vs MON | 32 | 310 | L | 8.0 | 7 | 1 | 1 | 1 | 2 | 7 | 125 | 47 | 78 | 62% | 15-10 | 3.80 | 1.31 |
| 2003-09-19 | Tom Glavine | L | 37 | W 1-7 | vs MON | 31 | 536 | L | 6.0 | 7 | 5 | 5 | 2 | 3 | 2 | 104 | 41 | 63 | 61% | 9-14 | 4.60 | 1.48 |
| 2003-09-20 | Aaron Heilman | R | 25 | W 3-4 | vs MON | 12 | 12 | - | 4.0 | 4 | 3 | 3 | 1 | 4 | 3 | 74 | 31 | 43 | 58% | 2-6 | 6.75 | 1.83 |
| 2003-09-21 | Jae-Wong Seo | R | 26 | W 2-4 | vs MON | 30 | 30 | - | 7.1 | 5 | 1 | 1 | 1 | 2 | 8 | 131 | 40 | 91 | 69% | 8-12 | 3.91 | 1.28 |
| 2003-09-23 | Al Leiter | L | 38 | L 1-0 | vs PIT | 30 | 326 | W | 9.0 | 8 | 0 | 0 | 0 | 1 | 6 | 122 | 46 | 76 | 62% | 15-9 | 3.98 | 1.49 |
| 2003-09-24 | Steve Trachsel | R | 33 | L 5-3 | vs PIT | 33 | 311 | W | 6.0 | 6 | 2 | 2 | 0 | 2 | 4 | 118 | 45 | 73 | 62% | 16-10 | 3.78 | 1.31 |
| 2003-09-25 | Tom Glavine | L | 38 | W 1-3 | vs PIT | 32 | 537 | - | 5.0 | 6 | 1 | 1 | 0 | 0 | 2 | 75 | 21 | 54 | 72% | 9-14 | 4.52 | 1.48 |
| 2003-09-26 | Aaron Heilman | R | 25 | L 3-4 | @ FLO | 13 | 13 | L | 5.0 | 8 | 4 | 4 | 1 | 2 | 4 | 83 | 31 | 52 | 63% | 2-7 | 6.78 | 1.85 |
| 2003-09-27 | Jae-Wong Seo | R | 26 | W 9-3 | @ FLO | 31 | 31 | W | 6.0 | 5 | 2 | 1 | 0 | 1 | 2 | 94 | 33 | 61 | 65% | 9-12 | 3.83 | 1.27 |
| 2003-09-28 | Jeremy Griffiths | R | 26 | L 0-4 | @ FLO | 6 | 6 | L | 4.0 | 7 | 4 | 4 | 1 | 2 | 2 | 73 | 29 | 44 | 60% | 1-4 | 7.02 | 1.85 |