Red Sox vs Marlins Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 15

Odds updated as of 7:15 p.m.

MLB action on Friday includes the Boston Red Sox taking on the Miami Marlins.

Here's everything you need to know before checking out today's MLB odds and spreads on FanDuel Sportsbook.

Red Sox vs Marlins Game Info

• Boston Red Sox (66-56) vs. Miami Marlins (58-63)
• Date: Friday, August 15, 2025
• Time: 7:10 p.m. ET
• Venue: Fenway Park -- Boston, Massachusetts
• Coverage: NESN and FDSFL

Red Sox vs Marlins Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: BOS: (-166) | MIA: (+140)
• Spread: BOS: -1.5 (+122) | MIA: +1.5 (-146)
• Total: 8.5 -- Over: (-118) | Under: (-104)

Red Sox vs Marlins Probable Starting Pitchers

Probable Pitchers: Lucas Giolito (Red Sox) - 8-2, 3.77 ERA vs Sandy Alcantara (Marlins) - 6-11, 6.55 ERA

This contest's pitching matchup is set, as the Red Sox will send Lucas Giolito (8-2) to the mound, while Sandy Alcantara (6-11) will take the ball for the Marlins. Giolito and his team are 13-5-0 ATS this season when he starts. When Giolito starts a game and his team is the favorite on the moneyline, they have a record of 6-2. The Marlins are 10-13-0 against the spread when Alcantara starts. The Marlins have been the underdog on the moneyline in 18 of Alcantara's starts this season, and they went 9-9 in those games.

Red Sox vs Marlins Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Red Sox win (61.4%)

Red Sox vs Marlins Moneyline

• The moneyline numbers for Red Sox vs. Marlins reveal Boston as the favorite (-166) and Miami as the underdog (+140) on the road.

Red Sox vs Marlins Spread

• The Marlins are at the Red Sox, and are +1.5 on the runline. The Marlins are +122 to cover the spread, and the Red Sox are -146.

Red Sox vs Marlins Over/Under

• The Red Sox-Marlins contest on Aug. 15 has been given an over/under of 8.5 runs. The over is set at -118 and the under at -104.

Bet on Boston Red Sox vs. Miami Marlins on FanDuel today!

Red Sox vs Marlins Betting Trends

• The Red Sox have been favorites in 72 games this season and have come away with the win 42 times (58.3%) in those contests.
• Boston has a record of 11-5 when favored by -166 or more this year.
• The Red Sox's games have gone over the total in 59 of their 121 opportunities.
• The Red Sox are 68-53-0 against the spread in their 121 games with a line set by sportsbooks this season.
• The Marlins have compiled a 47-51 record in games they were the underdog on the moneyline (winning 48% of those games).
• Miami has gone 14-17 when playing as a moneyline underdog with odds of +140 or longer (45.2%).
• The Marlins have played in 117 games with an over/under set, and have combined with their opponents to go over the total 55 times (55-62-0).
• The Marlins have collected a 69-48-0 record ATS this season (covering 59% of the time).

Red Sox Player Leaders

• Jarren Duran has an OPS of .787, fueled by an OBP of .334 to go with a slugging percentage of .453. He has a .263 batting average, as well.
• Among all qualifying hitters in MLB, he is 63rd in batting average, 67th in on-base percentage, and 61st in slugging.
• Ceddanne Rafaela is batting .259 with 24 doubles, three triples, 14 home runs and 20 walks. He's slugging .436 with an on-base percentage of .300.
• Among qualified batters, his batting average places him 80th, his on-base percentage 134th, and his slugging percentage 74th.
• Rafaela has picked up at least one hit in three games in a row. During his last five outings he is hitting .200 with a double, two walks and an RBI.
• Trevor Story has 116 hits this season and has a slash line of .256/.301/.419.
• Story enters this matchup with two games in a row with at least one hit. In his last five games he is hitting .182 with a double and two RBIs.
• Wilyer Abreu leads Boston with 87 hits, batting .254 this season with 37 extra-base hits.
• Abreu enters this matchup on a two-game hitting streak. In his last five games he is batting .333 with two doubles, four walks and three RBIs.

Marlins Player Leaders

• Kyle Stowers has put up an on-base percentage of .365 and has 113 hits, both team-best numbers for the Marlins. He's batting .285 and slugging .538.
• Including all the qualified players in the big leagues, he is 22nd in batting average, 21st in on-base percentage and eighth in slugging percentage.
• Xavier Edwards is slugging .379 to pace his team. He has a batting average of .305 with an on-base percentage of .364.
• Including all qualifying hitters, he ranks sixth in batting average, 24th in on-base percentage and 134th in slugging percentage.
• Otto Lopez has 16 doubles, 11 home runs and 38 walks while batting .241.
• Agustin Ramirez is hitting .236 with 25 doubles, a triple, 17 home runs and 26 walks.

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