Arizona Diamondbacks at Colorado Rockies

On Thursday, September 24, 2026, the Arizona Diamondbacks defeated the Colorado Rockies 12-8. The four-run final margin means our high-rated pick on Colorado +1.5 went down as a clear loss against the tracked DraftKings spread.

Our statistical model expected a much tighter contest, projecting a 5–4 Arizona victory and pointing to a playable edge on Colorado catching 1.5 runs at home. Colorado’s lineup actually produced plenty of offense with eight runs, but the game completely blew past the projected total of 10 as both pitching staffs struggled to maintain control.

The model’s miss came down to underestimating Arizona’s offensive output and the overall run environment. Rather than a one-run margin that would have kept the Rockies within the number, Arizona’s sustained pressure broke the game open late. It was a faulty read on pitching suppression, and we take an honest loss on the spread.

The Arizona Diamondbacks visit the Colorado Rockies on Thursday in an NL West matchup where our statistical model anticipates a tightly contested game. The baseline projection has Arizona securing a narrow 5–4 victory, suggesting a closer affair than standard run lines typically reflect.

When we published, we took the Rockies at +1.5 on DraftKings. Built on 33 games of scoring form for Arizona and 32 for Colorado, the model projects a margin of defeat for the Rockies of just 0.4 runs. Comparing that tight projection to the market number reveals a 1.11-point statistical edge toward the home side covering the 1.5-run cushion.

Due to that sizable discrepancy, the model assigns a high rating to Colorado +1.5. While projection models highlight edges rather than guarantees, the numbers point toward Colorado having a strong statistical probability of keeping the final margin within a single run to cover the tracked spread.