2003 Colorado Rockies season Game log April

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| April 1 | @ Astros | 10–4 | Jennings (0–1) | 43241 | 0–1 |
| April 2 | @ Astros | 8–7 | Jiménez (0–1) | 21082 | 0–2 |
| April 3 | @ Astros | 10–5 | Robertson (0–1) | 21171 | 1–2 |
| April 4 | Diamondbacks | 2–1 | Kim (0–1) | 48087 | 2–2 |
| April 5 | Diamondbacks | 4–3 (10) | Batista (0–1) | 25197 | 3–2 |
| April 6 | Diamondbacks | 8–3 | Schilling (0–1) | 25443 | 4–2 |
| April 8 | Cardinals | 15–12 (13) | Miceli (0–1) | 21563 | 4–3 |
| April 9 | Cardinals | 9–4 | Tomko (0–1) | 24110 | 5–3 |
| April 10 | Cardinals | 7–6 | Kline (0–1) | 24586 | 6–3 |
| April 11 | @ Padres | 6–4 | Oliver (0–1) | 21190 | 6–4 |
| April 12 | @ Padres | 3–2 | Villafuerte (0–1) | 30830 | 7–4 |