Preview for Wednesday, September 23, 2026. Schedule and player information can change.
Arizona Diamondbacks at Colorado Rockies
Arizona Diamondbacks visit the Colorado Rockies with Merrill Kelly on the mound against Mason Adams. Kelly brings a 5.00 ERA and a WP-calculated FIP of 5.47 across approximately 156.7 innings pitched this season, while Adams carries a 5.09 ERA and a 6.26 FIP over a much smaller sample of about 23.0 innings pitched. On the season-to-date numbers, Kelly's FIP is the lower of the two, giving Arizona the edge in the projected starting pitching matchup, though his 156.7 innings compared to Adams' 23.0 innings mark a significant difference in workload and track record.
Looking at the team-level figures, Arizona's offense carries a WP-estimated wOBA of 0.310 while Colorado's is higher at 0.319, favoring the Rockies at the plate. On the run-prevention side, Arizona's team ERA of 4.09 and FIP of 4.40 are both lower than Colorado's team ERA of 5.58 and FIP of 4.91, which favors the Diamondbacks overall in preventing runs.
Several injury statuses are listed for this matchup. Kyle Amendt and Ryan Bruno of the Diamondbacks are listed on the 60-Day IL, and Yordin Chalas of Arizona is listed on the 7-Day IL. For Colorado, Tyler Bell is listed as 'Out,' while Brody Brecht and McCade Brown are both listed on the 60-Day IL. Taken together, the pitching staff and team run-prevention numbers lean toward Arizona, while Colorado's offensive wOBA figure is the stronger of the two team marks.
Statistical scope: MLB Stats API; 2026 regular season season-to-date; exact statistical through-date not supplied.
WP selection: Diamondbacks moneyline. Confidence: Confident.
The selection is supplied separately by WP. The comparisons above do not establish why the model made this selection.
WP home-run candidate for Diamondbacks: Corbin Carroll. The selection uses roster and season-stat inputs; it does not establish a confirmed batting lineup or favourable betting odds.
WP home-run candidate for Rockies: Mickey Moniak. The selection uses roster and season-stat inputs; it does not establish a confirmed batting lineup or favourable betting odds.
Predictions are uncertain; no outcome is guaranteed. Check the picks page for the latest available selections.