2003 Colorado Rockies season Game log May

| Date_ | Opponent | Score | Loss | Record |
|---|---|---|---|---|
| May 1 | Reds | 7–2 | Cruz (3–2) | 15–13 |
| May 2 | @ Cubs | 7–4 | Chacón (4–1) | 15–14 |
| May 3 | @ Cubs | 6–4 | Guthrie (0–2) | 16–14 |
| May 4 | @ Cubs | 5–4 (10) | Reed (2–1) | 16–15 |
| May 6 | @ Braves | 3–2 | Jones (0–1) | 16–16 |
| May 8 | @ Braves | 12–6 | Cruz (3–3) | 16–17 |
| May 8 | @ Braves | 5–2 | Chacón (4–2) | 16–18 |
| May 9 | @ Marlins | 5–4 | Speier (2–1) | 16–19 |
| May 10 | @ Marlins | 5–4 | Tejera (0–1) | 17–19 |
| May 11 | @ Marlins | 7–2 | Cook (1–3) | 17–20 |
| May 12 | Mets | 9–6 | Young (0–1) | 17–21 |
| May 13 | Mets | 9–8 | Cerda (0–1) | 18–21 |