2003 Chicago Cubs season Game log June

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| June 1 | Astros | 9–3 | Wood (4–4) | 37787 | 30–25 |
| June 3 | Devil Rays | 3–2 | Levine (2–2) | 32210 | 31–25 |
| June 4 | Devil Rays | 5–2 | Estes (5–5) | 33317 | 31–26 |
| June 5 | Devil Rays | 8–1 | Brazelton (1–5) | 28713 | 32–26 |
| June 6 | Yankees | 5–3 | Zambrano (5–5) | 39359 | 32–27 |
| June 7 | Yankees | 5–2 | Clemens (6–4) | 39363 | 33–27 |
| June 8 | Yankees | 8–7 | Pettitte (5–6) | 39341 | 34–27 |
| June 10 | @ Orioles | 4–0 | Hentgen (1–4) | 32484 | 35–27 |
| June 11 | @ Orioles | 7–6 | Daal (4–7) | 28013 | 36–27 |
| June 12 | @ Orioles | 6–1 | Zambrano (5–6) | 30557 | 36–28 |
| June 13 | @ Blue Jays | 5–1 | Wood (5–5) | 23018 | 36–29 |