1989 Oakland Athletics season Game log August

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| August 11 | @ Angels | 5–0 | Witt (7–10) | 61696 | 70–46 |
| August 12 | @ Angels | 8–3 | Abbott (10–8) | 53036 | 71–46 |
| August 13 | @ Angels | 4–3 | Stewart (16–7) | 60326 | 71–47 |
| August 15 | Indians | 5–2 | Nichols (3–2) | 28459 | 72–47 |
| August 16 | Indians | 6–3 | Honeycutt (2–2) | 29502 | 72–48 |
| August 17 | Indians | 1–0 | Farrell (7–12) | 35071 | 73–48 |
| August 18 | Twins | 4–3 | Stewart (16–8) | 38956 | 73–49 |
| August 19 | Twins | 5 – 4 (10) | Wayne (3–4) | 44123 | 74–49 |
| August 20 | Twins | 5–0 | Anderson (14–10) | 43875 | 75–49 |
| August 21 | @ Tigers | 6–1 | Tanana (9–11) | 6197 | 76–49 |
| August 22 | @ Rangers | 2–0 | Ryan (14–8) | 42869 | 77–49 |
| August 23 | @ Rangers | 5–4 | Brown (11–8) | 23453 | 78–49 |