2004 Boston Red Sox season Game log August

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| August 20 | @ White Sox | 10 - 1 | Buehrle (11-7) | 38720 | 68-52 |
| August 21 | @ White Sox | 10 - 7 | Stewart (0-1) | 37303 | 69-52 |
| August 22 | @ White Sox | 6 - 5 | Marte (4-5) | 34355 | 70-52 |
| August 23 | @ Blue Jays | 3 - 0 | Martínez (13-5) | 27145 | 70-53 |
| August 24 | @ Blue Jays | 5 - 4 | Batista (9-10) | 22217 | 71-53 |
| August 25 | @ Blue Jays | 11 - 5 | Towers (9-5) | 22479 | 72-53 |
| August 26 | Tigers | 4 - 1 | Johnson (8-12) | 35153 | 73-53 |
| August 27 | Tigers | 5 - 3 | Maroth (10-9) | 35018 | 74-53 |
| August 28 | Tigers | 5 - 1 | Bonderman (7-11) | 35032 | 75-53 |
| August 29 | Tigers | 6 - 1 | Ledezma (3-2) | 34268 | 76-53 |
| August 31 | Angels | 10 - 7 | Lackey (11-11) | 35040 | 77-53 |