1978 Toronto Blue Jays season Game log May

| Date_ | Opponent | Score | Loss | Record |
|---|---|---|---|---|
| May 25 | Red Sox | 9–5 | Underwood (1–5) | 15–26 |
| May 26 | @ Yankees | 4–3 | Garvin (2–3) | 15–27 |
| May 27 | @ Yankees | 4–1 | Figueroa (5–2) | 16–27 |
| May 28 | @ Yankees | 5–3 | Jefferson (3–6) | 16–28 |
| May 28 | @ Yankees | 6–5 (13) | Murphy (2–1) | 16–29 |
| May 29 | @ Red Sox | 5–4 | Underwood (1–6) | 16–30 |
| May 30 | @ Red Sox | 4–0 | Garvin (2–4) | 16–31 |
| May 31 | @ Red Sox | 6–2 | Lee (7–2) | 17–31 |