Colorado Rockies vs Arizona Diamondbacks Prediction 5/17/25 MLB Picks

In this article, we will formulate a Rockies vs Diamondbacks prediction for this MLB game on Saturday, May 17, at Chase Field in Phoenix, Arizona. Let’s take a look at the prediction for this MLB matchup.

Colorado Rockies Betting Preview

The Colorado Rockies (7-37, 2-21 Away) recently lost the series to the Giants, Tigers, Padres, and Rangers, scoring just five runs in a three-game sweep by Texas. For the sixth time this year, the Rockies failed to score as they lost Game 1 of the series against the Arizona Diamondbacks last night. In an 8-0 defeat, rookie Carson Palmquist took the loss after allowing five runs on six hits with no strikeouts and one walk in 4.0 innings.

This season, the Rockies average 3.14 runs per game (29th in the MLB) on a .213/.281/.347 triple-slash. When it comes to pitching, the Rockies’ staff has a 5.80 ERA (30th) and 1.60 WHIP (30th). Hunter Goodman leads the Rockies with a .292 batting average, six home runs, and 25 RBI this season.

German Marquez will take the mound for the Rockies on Saturday. The 30-year-old right-hander has a 1-6 record in right starts this year with an 8.27 ERA and 1.70 WHIP in 37.0 innings.

Arizona Diamondbacks Betting Preview

The Arizona Diamondbacks (24-21, 12-12 Home) lost the series to the Phillies and Mets, split with the Dodgers, and then defeated the San Francisco Giants in two of three games on the road. For the third time this season, the D-backs kept the opponents off the scoreboard in an 8-0 win against the Rockies on Friday. Eugenio Suarez and Geraldo Perdomo led the team with three RBI apiece, while Corbin Burnes got the win after allowing no runs on two hits with ten strikeouts and three walks across 6.0 innings of work.

This year, the Diamondbacks average 5.11 runs per game (5th in the MLB) on a .255/.336/.446 triple-slash. When it comes to pitching, the Diamondbacks’ staff has a 4.60 ERA (24th) and 1.33 WHIP (22nd). Eugenio Suarez leads the Diamondbacks with a .213 batting average, 13 home runs, and 34 RBI this season.

The projected starting pitcher for the Diamondbacks is Zac Gallen, who is 3-5 in nine starts this season, with a 4.59 ERA and 1.31 WHIP in 51.0 innings.

Total Runs Facts

• Seven of the Diamondbacks’ last eight home games against National League opponents have gone UNDER the total runs line.
• Five of the Rockies’ last six games as underdogs against National League opponents have gone OVER the total runs line.
• The ‘Inning 1 OVER 0.5 runs’ market has hit in four of the Rockies’ last five games as underdogs against NL West opponents.
• The ‘Inning 1 UNDER 0.5 runs’ market has hit in four of the Diamondbacks’ last five night games at Chase Field.

Matchup/League Facts

• The Diamondbacks rank 3rd in the league for slugging percentage this season (.446).
• The Diamondbacks rank 4th in the league for home runs this season (61).
• The Rockies rank 30th in the league for batting average this season (.213).
• The Rockies rank 30th in the league for strikeouts against this season (432).

Rockies vs Diamondbacks Prediction

The Diamondbacks won seven of the previous ten H2H encounters. Four of the last six duels went Under, and I am backing another Under on Saturday, which is always risky when the Rockies are involved. Still, I have faith in German Marquez, who turned back the clock in his latest start against the Padres, allowing just one run after five consecutive starts with 5+ runs allowed. Marquez struggled with injuries in the last couple of years, but he still got it, and he also has nice numbers against the D-backs in his career. Marquez allowed a .229 BA in 105 at-bats against Arizona. Zac Gallen, on the other hand, allowed a .231 BA in 65 at-bats against Colorado. Back the Under.