Arizona Diamondbacks vs Colorado Rockies Picks and Predictions May 18th 2025

Rockies vs Diamondbacks

The Colorado Rockies visit Chase Field in Phoenix to face the Arizona Diamondbacks in the series finale on Sunday, May 18 at 1:10 PM MT. Expect mostly sunny skies turning partly cloudy late with a high near 87°F and a low around 68°F.

Schaeffer’s Shower Celebration

Interim manager Warren Schaeffer earned his first win Saturday with a historic 14–12 comeback, celebrating in classic baseball fashion with a shower-room dousing. That momentum and clubhouse energy will be on full display as the Rockies pursue their first series victory after starting 0-14.

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Offensive Fireworks

Colorado exploded for season highs in runs (14) and hits (19), powered by five homers from four different players. Rookie Jordan Beck tallied three hits including two homers, while Ezequiel Tovar collected a career-high five hits. Can the Rockies replicate that offensive outburst against Merrill Kelly?

Pitching Matchup

Arizona counters with right-hander Merrill Kelly (4-2, 3.71 ERA), fresh off consecutive quality starts and holding a 3.51 ERA over 15 career starts versus Colorado. Opposing him is Rockies rookie Chase Dollander (2-4, 6.88 ERA), who delivered six innings of two-run ball his last time out despite taking a loss.

X-Factors and Trends

The Rockies have been historically challenged but have shown resilience after the big comeback. Look for Angel Chivilli’s pinch-hit heroics and Tovar’s return from injury to keep the rally alive. On the Diamondbacks’ side, watch for the potential activation of closer Justin Martinez to stabilize late innings.

Our MLB Predictions

Given Kelly’s consistency and the Rockies’ pitching struggles, backing Arizona on the money line seems prudent. For additional value, consider the over on total runs—both teams have combined for 26 runs the past two meetings, hinting at another offensive shootout.