Miami Marlins vs. Colorado Rockies Prediction and Picks - September 18, 2025
Use Code WWWC Thursday afternoon, MLB action, and we have a Miami Marlins vs Colorado Rockies Prediction ready to roll. It has been a rough season for the Marlins, as they are just 72-80 on the year, while the Rockies come in with the worst record in baseball at 41-111 on the season. Miami has taken the first two games in this series. Continue reading to see our Marlins vs Rockies prediction.
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Marlins Are Looking To Finish The Season Strong
The Marlins are finishing the season with a spark, winning six of their last seven and showing signs of cohesion across the lineup. Wednesday’s 8–4 win over Colorado was a showcase of timely hitting and bullpen control, with Agustín Ramírez driving in three runs and Lake Bachar locking down the middle innings. Miami’s offense has averaged 5.3 runs per game during this stretch, and they’ve leaned on emerging contributors like Eric Wagaman and Javier Sanoja to keep pressure on opposing pitchers. With playoff hopes long gone, the Marlins are playing loose and aggressive, and it’s paying off.
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Thursday’s starter Sandy Alcantara (9–12, 5.53 ERA) has had a rocky season, but he’s still capable of dominant stretches. He’s posted a 3.21 ERA in his last three starts and has cut down on walks, which is crucial at Coors Field. Alcantara’s sinker-heavy arsenal plays well against ground-ball-prone lineups, and he’ll look to neutralize Colorado’s few remaining threats. Miami’s bullpen has been solid, ranking 12th in holds and converting 64.3% of save opportunities, giving them a reliable back-end if Alcantara can get through six.
Defensively, Miami has tightened up, committing just one error in their last five games and turning seven double plays over that span. Their outfield positioning has improved, especially in spacious parks like Coors, where tracking fly balls is a challenge. The Marlins have also been aggressive on the basepaths, with 12 steals in their last 10 games, adding another layer of pressure. With momentum, a capable starter, and a lineup that’s finding rhythm, Miami enters Thursday with a clear edge.
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The Rockies Are Historically Bad
The Rockies are limping to the finish line, now losers of 21 of their last 25 and staring down one of the worst records in modern MLB history. Wednesday’s 8–4 loss to Miami was emblematic of their season—early promise, followed by walks, defensive lapses, and bullpen collapse. Mickey Moniak homered, and Hunter Goodman added two hits, but the team issued nine walks and couldn’t hold a 2–0 lead. At 41–111, Colorado is just two losses away from tying the 2024 White Sox for futility, and morale is visibly low.
Thursday’s starter Tanner Gordon (6–6, 6.14 ERA) has been serviceable but not dominant, and he’ll face a Marlins lineup that’s patient and opportunistic. Gordon has allowed 18 earned runs in his last four starts and has struggled with command, walking 11 batters over that stretch. The Rockies bullpen has been even worse, converting just 52.9% of save chances and blowing 24 leads this season. With Coors Field amplifying mistakes, Colorado’s pitching staff will need a near-perfect outing to stay competitive.
Offensively, the Rockies rank 29th in runs per game (3.73) and dead last in team OPS. Goodman and Moniak have been the only consistent threats, but the lineup lacks depth and plate discipline. They’ve struck out 1,412 times this season—third-most in MLB—and have hit just 135 home runs, despite playing in the league’s most hitter-friendly park. Defensive metrics are equally grim, with Colorado ranking bottom-five in fielding percentage and defensive runs saved. Unless they find a spark, Thursday could be another long night in Denver.
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Miami Marlins vs Colorado Rockies Pick
Marlins vs Rockies Moneyline Pick
- Miami -165 (5 Units)
Miami is the clear side in Thursday’s matchup, riding a six-win-in-seven stretch and fresh off an 8–4 victory over Colorado where they scored in six different innings. Agustín Ramírez continues to anchor the middle of the lineup with power and timely hitting, while Eric Wagaman and Javier Sanoja have added consistency at the top. The Marlins have averaged 5.3 runs per game during this run and face a Rockies team that’s dropped 21 of its last 25 and ranks dead last in ERA. With momentum, lineup depth, and a bullpen that’s quietly stabilized, Miami is built to handle Coors Field’s chaos.
Sandy Alcantara gets the start, and while his season ERA sits at 5.53, he’s posted a 3.21 mark over his last three outings and has the ground-ball profile to neutralize Colorado’s thin lineup. The Rockies counter with Tanner Gordon, who’s allowed 18 earned runs in his last four starts and faces a Marlins offense that’s patient and opportunistic. Colorado’s bullpen has converted just 52.9% of save chances and continues to unravel late in games. With Miami’s recent form and Colorado’s historic slide, backing the Marlins to win outright is a sharp, matchup-backed play.
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Marlins vs Rockies Over/Under Pick
- Over 10.5 (4 Units)
Over 10.5 is well within reach at Coors Field, especially with two volatile starters and bullpens that have struggled to close clean innings. Sandy Alcantara and Tanner Gordon both enter with ERAs north of 5.50, and while Alcantara has improved lately, his sinker can flatten at altitude—especially against contact-heavy lineups. Miami’s offense is clicking, averaging 5.3 runs over its last seven games, while Colorado, despite its record, still finds ways to scratch out runs at home. With nine walks issued by Rockies pitchers on Wednesday and both teams showing extra-base pop, this matchup sets up for crooked numbers and late-inning chaos.
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