1989 Oakland Athletics season Game log May

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| May 2 | @ Blue Jays | 8–5 | Ward (1–4) | 23439 | 19–8 |
| May 3 | @ Blue Jays | 2–0 | Moore (3–2) | 22370 | 19–9 |
| May 5 | @ Tigers | 5–3 | Tanana (2–4) | 18482 | 20–9 |
| May 6 | @ Tigers | 6–3 | Davis (2–3) | 32404 | 20–10 |
| May 7 | @ Tigers | 5–4 | Hudson (0–3) | 20391 | 21–10 |
| May 8 | @ Orioles | 6–1 | Milacki (1–3) | 19159 | 22–10 |
| May 11 | @ Orioles | 6–2 | Stewart (6–1) | 1201 | 22–11 |
| May 12 | Brewers | 5–4 | Plesac (1–2) | 30743 | 23–11 |
| May 13 | Brewers | 4–3 | Bosio (5–2) | 33053 | 24–11 |
| May 14 | Brewers | 2–1 | Moore (4–3) | 26989 | 24–12 |
| May 15 | Brewers | 12–2 | August (2–5) | 25974 | 25–12 |