2003 Chicago Cubs season Game log June

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| June 26 | Brewers | 5–3 | Borowski (1–1) | 39711 | 41–36 |
| June 27 | @ White Sox | 4–3 | Alfonseca (0–1) | 45147 | 41–37 |
| June 28 | @ White Sox | 7–6 | Cruz (1–3) | 45440 | 41–38 |
| June 29 | @ White Sox | 5–2 | Loaiza (11–3) | 44858 | 42–38 |
| June 30 | @ Phillies | 4–3 | Estes (6–7) | 23323 | 42–39 |