Marlins vs Astros Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 4

Odds updated as of 2:11 a.m.

The Miami Marlins versus the Houston Astros is on the MLB schedule for Monday.

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

Marlins vs Astros Game Info

• Miami Marlins (55-55) vs. Houston Astros (62-50)
• Date: Monday, August 4, 2025
• Time: 6:40 p.m. ET
• Venue: loanDepot park -- Miami, Florida
• Coverage: FDSFL and SCHN

Marlins vs Astros Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: MIA: (-112) | HOU: (-104)
• Spread: MIA: +1.5 (-188) | HOU: -1.5 (+155)
• Total: 8.5 -- Over: (-104) | Under: (-118)

Marlins vs Astros Probable Starting Pitchers

Probable Pitchers: Sandy Alcantara (Marlins) - 6-9, 6.36 ERA vs Jason Alexander (Astros) - 1-1, 7.36 ERA

The Marlins will give the nod to Sandy Alcantara (6-9) versus the Astros and Jason Alexander (1-1). Alcantara's team is 10-11-0 against the spread in his starts this season. Alcantara's team has been victorious in 33.3% of the games he's started as the moneyline favorite with a record of 1-2. When Alexander starts, the Astros have gone 2-1-0 against the spread. The Astros have yet to be named a moneyline underdog when Alexander starts this season.

Marlins vs Astros Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Astros win (51.5%)

Marlins vs Astros Moneyline

• The moneyline numbers for Marlins vs. Astros reveal Miami as the favorite (-112) and Houston as the underdog (-104) on the road.

Marlins vs Astros Spread

• The Astros are 1.5-run favorites against the spread for this matchup with the Marlins. The Astros are +155 to cover, while the Marlins are -188 to cover as a 1.5-run underdog on the runline.

Marlins vs Astros Over/Under

• Marlins versus Astros on Aug. 4 has an over/under of 8.5 runs, with the odds on the over -104 and the under set at -118.

Bet on Miami Marlins vs. Houston Astros on FanDuel today!

Marlins vs Astros Betting Trends

• The Marlins have won in five, or 41.7%, of the 12 contests they have been named as odds-on favorites in this year.
• This season Miami has come away with a win five times in 12 chances when named as a favorite of at least -112 on the moneyline.
• The Marlins and their opponents have gone over in 48 of their 106 games with a total set by sportsbooks this season.
• The Marlins have an against the spread mark of 65-41-0 in 106 games with a line this season.
• The Astros have won 20 of the 33 games they were the underdog on the moneyline this season (60.6%).
• When playing as a moneyline underdog with odds of -104 or longer, Houston has a 17-12 record (winning 58.6% of its games).
• The Astros have had an over/under set by oddsmakers 111 times, and have combined with opponents to go over the total in 46 of those games (46-61-4).
• The Astros have put together a 55-56-0 record ATS this season (covering 49.5% of the time).

Marlins Player Leaders

• Kyle Stowers leads Miami with 105 hits and an OBP of .373 this season. He has a .296 batting average and a slugging percentage of .575.
• Among qualifying hitters in baseball, his batting average ranks 13th, his on-base percentage ranks 18th, and he is fifth in slugging.
• Otto Lopez has 14 doubles, 11 home runs and 35 walks. He's batting .250 and slugging .384 with an on-base percentage of .322.
• His batting average ranks 99th among qualified players, his on-base percentage 90th, and his slugging percentage 124th.
• Agustin Ramirez is batting .241 with a .465 slugging percentage and 50 RBI this year.
• Xavier Edwards has an OPS of .716, fueled by an OBP of .358 and a team-best slugging percentage of .358 this season.

Astros Player Leaders

• Jose Altuve has put up a slugging percentage of .457, a team-best for the Astros. He's batting .280 with an on-base percentage of .341.
• Including all the qualified hitters in the big leagues, he is 31st in batting average, 59th in on-base percentage and 56th in slugging percentage.
• Jeremy Pena paces his team with 105 hits and a .377 on-base percentage. He has a batting average of .322 while slugging .485.
• His batting average is third among all qualified players, his on-base percentage ranks 14th, and he is 26th in slugging.
• Yainer Diaz has 15 doubles, a triple, 15 home runs and 15 walks while batting .252.
• Jesus Sanchez is batting .256 with 13 doubles, four triples, 10 home runs and 30 walks.

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