Rockies vs Diamondbacks Picks and Prediction – 5/18/2025

The Colorado Rockies will be returning to Chase Field on Saturday, where they will meet the Arizona Diamondbacks. Get the rest of our free MLB picks here! The Rockies currently sit fifth in the NL West, putting together a record of 7-36. Colorado has lost three straight games, most recently suffering an 8-3 loss against Texas. German Marquez will be Colorado’s starting pitcher in this game, he’s posted an 8.27 ERA to go along with his 1-6 record. The Rockies are scoring 3.2 runs per game, while giving up a league-worst 10.3 hits and 6.4 runs per game.

The Diamondbacks currently sit fourth in the NL West, as they enter this game with a 23-21 record. Arizona has won 2 of their last 3 games, they come into this series fresh off an 8-7 win over the San Francisco Giants on Wednesday. Zach Gallen will be the starting pitcher for the Diamondbacks in this game, he’s posted a 4.59 ERA this season. Arizona is the fifth highest scoring team in baseball this season, as they are averaging 5.0 runs a game. The Diamondbacks have allowed 8.7 hits (24th in MLB) and 5.1 runs per game. 

The Diamondbacks will be on the hunt for their fourth win in five games, while Rockies face what could be their fourth consecutive loss. Expect Arizona to easily cover the -1.5 spread in this game. Final score prediction, Arizona wins 6-2.