2005 Seattle Mariners season Game log August

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| August 14 | Angels | 7–6 | Sherrill (1–1) | 38468 | 49–67 |
| August 15 | Royals | 11–3 | Hernández (8–11) | 31908 | 50–67 |
| August 16 | Royals | 4–3 | Affeldt (0–2) | 31425 | 51–67 |
| August 17 | Royals | 11–5 | Carrasco (5–7) | 35224 | 52–67 |
| August 18 | @ Twins | 7–3 | Franklin (6–13) | 22230 | 52–68 |
| August 19 | @ Twins | 7–4 | Sherrill (1–2) | 24795 | 52–69 |
| August 20 | @ Twins | 8–3 | Guerrier (0–2) | 33334 | 53–69 |
| August 21 | @ Twins | 8–3 | Piñeiro (5–8) | 33405 | 53–70 |
| August 23 | @ Rangers | 6–4 | Moyer (10–5) | 25653 | 53–71 |
| August 24 | @ Rangers | 8–1 | Franklin (6–14) | 28612 | 53–72 |
| August 25 | @ Rangers | 8–2 | Benoit (3–4) | 19112 | 54–72 |
| August 26 | White Sox | 5–3 | Nelson (1–3) | 40431 | 54–73 |