1980 Toronto Blue Jays season Game log May

| Date_ | Opponent | Score | Loss | Record |
|---|---|---|---|---|
| May 13 | Mariners | Postponed (rain) Rescheduled for July 26 | Postponed (rain) Rescheduled for July 26 | Postponed (rain) Rescheduled for July 26 |
| May 14 | Mariners | 7–0 | Mirabella (3–2) | 15–12 |
| May 15 | Mariners | 1–0 | Bannister (2–3) | 16–12 |
| May 16 | Athletics | 1–0 (11) | Norris (5–1) | 17–12 |
| May 17 | Athletics | 4–2 (14) | McLaughlin (1–2) | 17–13 |
| May 18 | Athletics | 12–1 | Langford (3–2) | 18–13 |
| May 19 | Red Sox | 7–2 | Billingham (1–1) | 19–13 |
| May 20 | Red Sox | 4–3 | Lemanczyk (2–5) | 19–14 |
| May 21 | Red Sox | 11–2 | Jefferson (2–2) | 19–15 |
| May 22 | Yankees | 5–1 | Stieb (4–2) | 19–16 |
| May 23 | Yankees | 7–3 | Mirabella (4–3) | 19–17 |
| May 24 | Yankees | 6–2 | Clancy (3–2) | 19–18 |
| May 25 | Yankees | 9–6 | John (7–2) | 20–18 |
| May 26 | @ Red Sox | 3–1 | Drago (2–2) | 21–18 |