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

Odds updated as of 6:11 p.m.

The MLB slate on Monday includes the Miami Marlins facing the Houston Astros.

Before you do any MLB betting on this game at FanDuel Sportsbook, here's what you need to know.

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: (-130) | HOU: (+110)
• Spread: MIA: -1.5 (+155) | HOU: +1.5 (-188)
• 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 and his team are 10-11-0 ATS this season when he starts. When Alcantara starts a game and his team is the favorite on the moneyline, they have a record of 1-2. The Astros are 2-1-0 ATS in Alexander's three starts that had a set spread. The Astros have not been the underdog on the moneyline when Alexander starts this season.

Marlins vs Astros Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Marlins win (50.3%)

Marlins vs Astros Moneyline

• The Marlins vs Astros moneyline has Miami as a -130 favorite, while Houston is a +110 underdog on the road.

Marlins vs Astros Spread

• The Marlins are favored by 1.5 runs at home versus the Astros. The Marlins are +155 to cover the spread, while the Astros are -188.

Marlins vs Astros Over/Under

• The Marlins-Astros contest on Aug. 4 has been given an over/under of 8.5 runs. The over is set at -104 and the under at -118.

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

Marlins vs Astros Betting Trends

• The Marlins have been victorious in five, or 41.7%, of the 12 contests they have been chosen as favorites in this season.
• This season Miami has been victorious three times in nine chances when named as a favorite of at least -130 on the moneyline.
• Contests with the Marlins have gone over the total set by oddsmakers in 48 of 106 chances 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 it has played as a moneyline underdog with odds of +110 or longer, Houston has a 13-7 record (winning 65% of its games).
• The Astros have had an over/under set by bookmakers 111 times, and have combined with opponents to go over the total in 46 of those games (46-61-4).
• The Astros have a 55-56-0 record against the spread this season (covering 49.5% of the time).

Marlins Player Leaders

• Kyle Stowers has 105 hits and an OBP of .373, both of which are best among Miami hitters this season. He has a .296 batting average and a slugging percentage of .575.
• Among qualifying batters 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.
• Among qualifying hitters, his batting average ranks him 99th, 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 leads Miami in slugging percentage (.358) thanks to 20 extra-base hits.

Astros Player Leaders

• Jose Altuve has a .457 slugging percentage, which paces the Astros. He's batting .280 with an on-base percentage of .341.
• Including all qualified hitters in the big leagues, he ranks 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.
• Including all qualified hitters, he is third in batting average, 14th in on-base percentage and 26th in slugging percentage.
• Yainer Diaz has 15 doubles, a triple, 15 home runs and 15 walks while hitting .252.
• Jesus Sanchez is batting .256 with 13 doubles, four triples, 10 home runs and 30 walks.

Sign up for FanDuel Sportsbook and FanDuel Daily Fantasy today!