September 18, 2025

Game Preview

Written by: Jake Turner

Jake is a veteran sports analyst with over 10 years of MLB prop betting experience.

Marlins vs Rockies: Betting Preview & Props (Sep 18)

Last updated: September 18, 2025

Game Time: 9/18, 03:10PM

Game Preview

The Miami Marlins take on the Colorado Rockies in a matchup that sees Miami as the clear favorites. According to DraftKings, the Marlins are a -176 favorite while the Rockies sit as a +144 underdog, with an overwhelming 90% of the money backing Miami. Expect a showdown at Coors Field where pitching depth and lineup matchups will play crucial roles.

Pitching Preview

Pitching Matchup: Sandy Alcantara vs Tanner Gordon

Sandy Alcantara (MIA):

Alcantara brings a balanced mix of speed and movement with his pitch arsenal: Sinker (23% usage, 97.2 mph), Changeup (22% usage, 90.5 mph), Four-Seam (21% usage, 97.6 mph), Curveball (18% usage, 85.5 mph), and Slider (16% usage, 89.4 mph). He's a velocity-heavy pitcher with an ability to confuse hitters with varied speeds and movements. The Rockies lineup averages .260 this season but projects to a .242 xBA against Alcantara's diverse repertoire.

Tanner Gordon (COL):

Gordon counters with a different approach, relying on his Four-Seam Fastball (42% usage, 91.2 mph) and a Sweeper (29% usage, 80.7 mph), complemented by a Curveball (12% usage, 76.4 mph), Sinker (10% usage, 91.5 mph), and Changeup (7% usage, 84.1 mph). The Marlins lineup, averaging .258 this season, projects to a higher .272 xBA against Gordon's offerings, indicating potential struggles for the Rockies' pitcher.

Lineup Matchups

Lineup Matchups & Batting Edges

For Miami vs Tanner Gordon: The Marlins lineup averages .258 this season but projects to .272 vs Gordon's arsenal. Notable performers include:

Agustín Ramírez: Season BA .250 → xBA vs arsenal .309 (+59 points), Season K% 22.5% → Arsenal K% 15.0% (-7.5%)
Otto Lopez: Season BA .245 → xBA vs arsenal .212 (-33 points), Season K% 13.97% → Arsenal K% 24.0% (+10.03%)

For Colorado vs Sandy Alcantara: The Rockies lineup averages .260 this season but projects to .242 vs Alcantara's arsenal. Key changes:

Brenton Doyle: Season BA .237 → xBA vs arsenal .264 (+27 points), Season K% 25.20% → Arsenal K% 23.0% (-2.20%)
Blaine Crim: Season BA .250 → xBA vs arsenal .138 (-112 points), Season K% 22.5% → Arsenal K% 32.6% (+10.1%)

Whiff Outlook

Strikeout Risks & Rewards

The Marlins' projected K-rate is 21.37% vs Tanner Gordon, up 2% from their 19.37% season average.
The Rockies' projected K-rate is 24.93% vs Sandy Alcantara, slightly down 0.81% from their 25.74% season average.

Umpire Influence

Behind the Plate: Umpire assignment has not been announced, which makes prop volatility a concern.

What to Bet On

📢 Prop Alert: Agustín Ramírez (.250 → .309, +59 points) meets betting lean criteria!

No significant statistical edges meet our betting threshold for strikeout props in this matchup.

🔑 Key Takeaways

Agustín Ramírez presents a strong batting prop opportunity against Tanner Gordon.
Sandy Alcantara's diverse arsenal poses a challenge for the Rockies lineup, particularly for Blaine Crim.
With the umpire unassigned, prop volatility remains high, urging caution in betting.
Overall, the Marlins hold a clear advantage both on the mound and at the plate.

🧠 FAQs

Q: Who is the best betting prop for the Marlins vs Rockies game? A: Agustín Ramírez stands out as a strong prop candidate based on our criteria.

Q: Is the umpire a pitcher-friendly umpire? A: Umpire assignment has not been announced, leaving this aspect uncertain.

Q: What time is the Marlins vs Rockies game? A: The game is scheduled for 9/18 at 03:10PM.

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