We get an NL West showdown tonight out in Colorado as a new series begins. The Rockies are set to host the Arizona Diamondbacks for a three-game set that could see the Snakes get back to the .500 mark over the coming days. Are we set for some high-scoring nights at Coors Field?

Here’s a betting prediction and pick for Friday’s Diamondbacks vs. Rockies matchup courtesy of MLB odds and lines on DraftKings Sportsbook.

Diamondbacks vs. Rockies prediction, preview

Arizona Diamondbacks

The D-Backs aren’t in panic mode by any means, but things could certainly be going more smoothly in the desert. They’re 20-22 and sit third in the NL West after dropping back-to-back contests as well as six of their last 10. Between a struggling offense and a rough pitching staff, they have a run differential of -25 on the campaign as well. Arizona averages 4.26 runs per game and is 26th in team OPS at just .686. With a slash line of .234/.299/.387, consistently getting on base appears to be a clear issue holding the group back — a low walk rate of just 8.1% doesn’t help, either. The Diamondbacks are fifth lowest in BB/K ratio at 0.38. A lack of standout power is another issue, bringing just 37 homers despite a .153 ISO. Meanwhile, their bullpen arms are 21st in ERA at 4.38 despite a 1.17 WHIP that ranks second best. They’re also 13th in K-BB% (13.4%) but dead last in LOB% (64.7%).

The starter tonight is RHP Merrill Kelly, who’s had a very ugly 2026 across a limited sample of just five starts. He’s 2-3 over those 26.0 IP with a 7.62 ERA, 1.92 WHIP and 20 strikeouts. However, he did allow just one earned run on three hits and three walks in his most recent outcome, by far his best outing of the young season.

Colorado Rockies

Everyone expected the Rockies to have another bad season, and so far, that’s unsurprisingly come to fruition. Colorado has a 17-27 overall record and sits last in the NL West, also dropping seven of its last 10 games. The team’s run differential sits at -36 as well despite averaging a respectable 4.27 runs per game. The Rockies’ bats are actually quite solid, ranking 11th in OPS at .714 with a slash line of .248/.316/.398. They’ve also produced a .150 ISO with 43 home runs, also relatively average marks. That’s where the positives end, especially with an 0.31 BB/K ratio and the second-worst K% at 25.5%. The arms are a significant problem as well. A staff ERA of 4.38 is third worst and things don’t get much better when isolating the numbers to the bullpen — a 4.37 ERA and 1.33 WHIP aren’t encouraging despite a 13.9% K-BB%. Pitching at Coors Field is always a challenge, too.

Colorado’s starter tonight is LHP Kyle Freeland, who’s tossed six games with a 1-4 record thus far. He has a 6.00 ERA, a 1.47 WHIP and 28 strikeouts over his 30.0 IP. He is generating a 95th-percentile chase rate and 86th-percentile BB%, but the remainder of his numbers are largely below average.

Diamondbacks vs. Rockies pick, best bet

DraftKings Sportsbook lists the Diamondbacks as -123 Moneyline favorites on the road tonight. The Rockies come in at +102 odds to win outright. The run total also sits at a whopping 11.5 combined runs between these sides.

Best Bet: Merrill Kelly under 16.5 outs recorded (-125)

I will admit that I drafted Kelly late in a fantasy league this season and almost feel as though I’ve been personally harmed by the guy prior to dropping him. However, taking the under on this pitcher prop doesn’t come as catharsis. Instead, this is a data-driven pick! His Baseball Savant page is very blue to say the least (which is a bad thing) with 10th-percentile grades or worse in the following metrics: pitching run value, xERA, xBA, average exit velocity, BB%, barrel rate and hard-hit rate. That’s a laundry list of things that are going wrong for him, and even with the context of a small sample size, tonight isn’t the night he turns it around. He’s pitching to a capable lineup at Coors, and after going under this line in four of his five appearances, he may get shelled for an early hook here.