1999 Colorado Rockies season Game log August

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| August 13 | Expos | 8–6 | Bohanon (10–10) | 45643 | 49–67 |
| August 14 | Expos | 11–8 | Powell (1–5) | 46739 | 50–67 |
| August 15 | Expos | 8–2 | Thurman (5–8) | 43702 | 51–67 |
| August 15 | Expos | 12–4 | Bennett (0–1) | 36483 | 52–67 |
| August 16 | Braves | 14–6 | Jones (6–10) | 47519 | 52–68 |
| August 17 | Braves | 3–2 | Mulholland (7–7) | 47904 | 53–68 |
| August 18 | Braves | 4–1 | Rocker (3–4) | 46553 | 54–68 |
| August 19 | Braves | 9–7 (14) | Lee (2–1) | 41791 | 54–69 |
| August 20 | @ Cubs | 11–3 | Farnsworth (2–7) | 40130 | 55–69 |
| August 21 | @ Cubs | 8–6 | Thomson (1–6) | 40087 | 55–70 |
| August 22 | @ Cubs | 3–2 | Trachsel (4–15) | 38424 | 56–70 |
| August 24 | @ Pirates | 3–2 | Williams (2–4) | 13221 | 57–70 |