Miami Marlins @ Boston Red Sox — Full Game Preview & Best Bets (Aug. 17, 2025)

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The Marlins visit Fenway for a Sunday matinee with first pitch at 1:35 PM ET. Boston’s push to stack wins at home meets a Miami club trying to manufacture offense and lean on run prevention. With the market sitting Red Sox -240, total 8.5, we’re handicapping a favorite that should control run expectancy early and often.

Craving more breakdowns like this? Check out our MLB previews.

Game Overview

Boston profiles as the more complete side right now—length from the starter, a lineup that punishes mistakes, and enough bullpen to land the plane. Miami’s path is narrower: steal a few early counts, keep traffic off the bases, and hope for soft contact in a tough yard for visiting pitchers.

Team Form

Marlins: Offense has lived in the bottom third for most of the season; when they score, it’s usually via a few well-timed extra-base hits rather than sustained rallies. Defense has been cleaner of late, but the margin for error is thin at Fenway.
Red Sox: Middle of the order is carrying torque—Boston’s best innings start with traffic and end with doubles off the wall. They’ve also tightened late-inning sequencing at home.

Pitching Matchup

TeamStarterRecord / ERANotes
MarlinsJanson Junk (RHP)Strike-thrower who needs edge calls. When behind, the four-seam flattens and hard contact follows. Best when living down with the slider/change mix.
Red SoxGarrett Crochet (LHP)Ace-level bat-missing profile. Tunnels the elevated heater with a wipeout slider; plays up at Fenway vs free-swinging lineups. Efficiency is the key—if he’s in the zone early, it’s a long day for Miami.

(Using your confirmed starters; day-of W-L/ERA can be dropped in at publish if you want exact numbers shown.)

Key Players to Watch

MIA: Jazz Chisholm Jr. — if he’s on twice, Miami can pressure with speed; Jake Burger — best shot at punishing a mistake heater.
BOS: Rafael Devers — matchup-proof barrel rate; Triston Casas — patience plus pull-side loft plays perfectly here.

Critical Factors

  • Count leverage: Junk must win early strikes; 1-0/2-1 counts tilt hard toward Boston’s damage hitters.
  • Contact quality: Crochet’s K% trims Miami’s already tight runways; if he’s landing the slider, Miami will live on weak fly balls.
  • Bullpens: Edge Boston. If the Sox hand it over with a lead, matchup flexibility should close.

Best Bets

  1. Red Sox -1.5 (Run Line) — Crochet’s whiff rate plus Fenway’s run creation for Boston’s core supports a multi-run script.
  2. Under 8.5 (first 5 lean) — Crochet suppression early; Miami’s path is thin unless Boston explodes. Full-game total is closer; first-5 under is the cleaner angle.
  3. Rafael Devers to Record an RBI — Prime RBI contexts vs a contact-leaning righty who can’t live up in the zone forever here.

Prediction

I’m pricing Boston to control tempo from pitch one. Crochet’s swing-and-miss sets the tone, the Sox create a crooked number in the middle innings, and the bullpen handles the rest.

Final Score: Red Sox 5, Marlins 2

Author

  • Corey Clarkson is a seasoned sports journalist and analyst with a passion for telling the stories behind the stats. With years of experience covering everything from the NFL playoffs to the World Cup, Corey’s insight bridges hard data with the human side of sports. His work dives deep into game strategy, player performance, and league trends—helping readers not just follow sports, but truly understand them. Whether it’s breaking down a crucial fourth-quarter play, analyzing a blockbuster trade, or exploring the culture around the game, Corey delivers content that informs, entertains, and sparks conversation.

    Corey has attended major sporting events across the world, interviewed professional athletes and coaches, and built a reputation for sharp, unbiased reporting. His goal is to bring fans closer to the action, whether they’re at the stadium, watching from home, or reading along.

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