1977 Seattle Mariners season Game log July

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| July 12 | @ Oakland Athletics | 2-3 | Romo (5-6) | 5299 | 37-53 |
| July 13 | @ Oakland Athletics | 3-1 | Langford (7-8) | 4529 | 38-53 |
| July 14 | @ California Angels | 4-1 | Brett (6-8) | 11400 | 39-53 |
| July 15 | @ California Angels | 6-2 | Nolan (4-3) | 11383 | 40-53 |
| July 16 | @ California Angels | 4-5 | Romo (5-7) | 29068 | 40-54 |
| July 17 | @ California Angels | 8-7 | LaRoche (6-3) | 10879 | 41-54 |
| July 21 | Oakland Athletics | 4-3 | Langford (7-10) | 17382 | 42-54 |
| July 22 | Oakland Athletics | 3-5 | Pole (6-6) | 13960 | 42-55 |
| July 23 | Oakland Athletics | 10-3 | Norris (2-7) | 12216 | 43-55 |
| July 24 | California Angels | 1-3 | House (3-4) | DH | 43-56 |
| July 24 | California Angels | 3-4 | Galasso (0-1) | 25344 | 43-57 |