1977 Seattle Mariners season Game log June

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| June 12 | Toronto Blue Jays | 5-2 | Vuckovich (2-5) | 28412 | 25-37 |
| June 14 | Oakland Athletics | 3-6 | House (1-1) | 13764 | 25-38 |
| June 15 | Oakland Athletics | 6-5 | Torrealba (3-1) | 14248 | 26-38 |
| June 16 | Oakland Athletics | 3-1 | Langford (4-5) | 11097 | 27-38 |
| June 17 | @ Texas Rangers | 2-1 | Marshall (2-1) | DH | 28-38 |
| June 17 | @ Texas Rangers | 6-8 | Wheelock (2-4) | 21577 | 28-39 |
| June 18 | @ Texas Rangers | 6-1 | Blyleven (6-8) | 17352 | 29-39 |
| June 19 | @ Texas Rangers | 2-1 | Perry (6-6) | 12465 | 30-39 |
| June 20 | @ Kansas City Royals | 4-2 | Leonard (4-8) | 21475 | 31-39 |
| June 21 | @ Kansas City Royals | 3-13 | Abbott (3-7) | 10958 | 31-40 |
| June 22 | @ Kansas City Royals | 3-4 | Pole (4-3) | 22140 | 31-41 |