1998 Colorado Rockies season Game log May

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| May 13 | Cubs | 9–3 | Astacio (3–5) | 48038 | 17–23 |
| May 14 | Cubs | 9–7 | Thomson (2–4) | 48077 | 17–24 |
| May 15 | Brewers | 8–5 | Kile (5–4) | 48035 | 17–25 |
| May 16 | Brewers | 7–5 | Ritz (0–2) | 48063 | 17–26 |
| May 17 | Brewers | 2–1 | Woodall (0–1) | 48041 | 18–26 |
| May 18 | Brewers | 8–5 | Juden (5–2) | 48026 | 19–26 |
| May 20 | @ Braves | 5–1 | Thomson (2–5) | 33531 | 19–27 |
| May 21 | @ Braves | 2–0 | Kile (5–5) | 34611 | 19–28 |
| May 22 | @ Reds | 3–2 | Weathers (2–4) | 21410 | 20–28 |
| May 23 | @ Reds | 4–1 (7) | Astacio (4–6) | 20034 | 20–29 |
| May 24 | @ Reds | 3–1 | Tomko (5–3) | 21298 | 21–29 |
| May 25 | @ Cardinals | 6–1 | Busby (5–1) | 42038 | 22–29 |