Astros vs Red Sox Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 3

Odds updated as of 9:11 p.m.

In MLB action on Sunday, the Houston Astros take on the Boston Red Sox.

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

Astros vs Red Sox Game Info

• Houston Astros (62-49) vs. Boston Red Sox (61-51)
• Date: Sunday, August 3, 2025
• Time: 11:35 a.m. ET
• Venue: Fenway Park -- Boston, Massachusetts
• Coverage: Roku

Astros vs Red Sox Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: HOU: (-120) | BOS: (+102)
• Spread: HOU: -1.5 (+130) | BOS: +1.5 (-156)
• Total: 8.5 -- Over: (-102) | Under: (-120)

Astros vs Red Sox Probable Starting Pitchers

Probable Pitchers: Framber Valdez (Astros) - 11-4, 2.62 ERA vs Lucas Giolito (Red Sox) - 7-2, 3.80 ERA

The Astros will give the nod to Framber Valdez (11-4) versus the Red Sox and Lucas Giolito (7-2). Valdez's team is 10-10-0 against the spread this season in his starts. Valdez's team has a record of 11-6 this season when he starts and they are the favorite on the moneyline. The Red Sox have an 11-5-0 ATS record in Giolito's 16 starts with a set spread. The Red Sox have a 5-3 record in Giolito's eight starts this season when they were the moneyline underdog.

Astros vs Red Sox Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Astros win (55.7%)

Astros vs Red Sox Moneyline

• Looking at the moneyline for Red Sox-Astros, Boston is the underdog at +102, and Houston is -120 playing on the road.

Astros vs Red Sox Spread

• The Red Sox are hosting the Astros, and are +1.5 on the runline. The Red Sox are +130 to cover the spread, and the Astros are -156.

Astros vs Red Sox Over/Under

• The over/under for the Astros versus Red Sox game on Aug. 3 has been set at 8.5, with -102 odds on the over and -120 odds on the under.

Bet on Houston Astros vs. Boston Red Sox on FanDuel today!

Astros vs Red Sox Betting Trends

• The Astros have been chosen as favorites in 76 games this year and have walked away with the win 41 times (53.9%) in those games.
• This season Houston has come away with a win 31 times in 58 chances when named as a favorite of at least -120 on the moneyline.
• The Astros and their opponents have gone over the total this season in 46 of their 110 opportunities.
• In 110 games with a line this season, the Astros have a mark of 55-55-0 against the spread.
• The Red Sox have won 46.2% of the games this season they were the underdog on the moneyline (18-21).
• Boston has a 15-15 record (winning 50% of its games) when it has played as a moneyline underdog of +102 or longer.
• The Red Sox have had an over/under set by bookmakers 111 times, and have combined with opponents to go over the total in 51 of those games (51-55-5).
• The Red Sox have collected a 62-49-0 record against the spread this season.

Astros Player Leaders

• Jose Altuve leads Houston in slugging percentage (.459) thanks to 36 extra-base hits. He has a .280 batting average and an on-base percentage of .342.
• Among all qualified hitters in MLB, his batting average ranks 32nd, his on-base percentage ranks 55th, and he is 57th in slugging.
• Jeremy Pena leads Houston with 105 hits and an OBP of .381 this season. He's batting .326 and slugging .491.
• Among all qualifying hitters, he ranks second in batting average, eighth in on-base percentage and 25th in slugging percentage.
• Yainer Diaz is batting .254 with a .420 slugging percentage and 45 RBI this year.
• Diaz takes a four-game hitting streak into this matchup. During his last five outings he is hitting .421 with a double, two home runs, a walk and five RBIs.
• Christian Walker has been key for Houston with 95 hits, an OBP of .301 plus a slugging percentage of .395.
• Walker takes a two-game hitting streak into this game. During his last five outings he is batting .333 with a double, two home runs, two walks and five RBIs.

Red Sox Player Leaders

• Jarren Duran has racked up an on-base percentage of .329, a slugging percentage of .457, and has 117 hits, all club-highs for the Red Sox (while batting .262).
• Including all qualifying hitters in the majors, he ranks 70th in batting average, 75th in on-base percentage and 58th in slugging percentage.
• Ceddanne Rafaela has 23 doubles, three triples, 14 home runs and 17 walks while batting .261. He's slugging .453 with an on-base percentage of .299.
• Including all qualifying players, he ranks 74th in batting average, 137th in on-base percentage and 64th in slugging percentage.
• Trevor Story has 19 doubles, 18 home runs and 22 walks while hitting .254.
• Wilyer Abreu is hitting .247 with 13 doubles, 20 home runs and 32 walks.

Astros vs Red Sox Head to Head

• 8/2/2025: 7-3 BOS (Favorite: Red Sox, Spread: -1.5, Total: 9.5, Favorite Moneyline: -134, Underdog Moneyline: +116)
• 8/1/2025: 2-1 BOS (Favorite: Astros, Spread: -1.5, Total: 8, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 8/21/2024: 4-1 BOS (Favorite: Astros, Spread: -1.5, Total: 8.5, Favorite Moneyline: -138, Underdog Moneyline: +118)
• 8/20/2024: 6-5 BOS (Favorite: Astros, Spread: -1.5, Total: 8.5, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 8/19/2024: 5-4 HOU (Favorite: Astros, Spread: -1.5, Total: 8, Favorite Moneyline: -146, Underdog Moneyline: +124)
• 8/11/2024: 10-2 HOU (Favorite: Astros, Spread: -1.5, Total: 10.5, Favorite Moneyline: -138, Underdog Moneyline: +118)
• 8/10/2024: 5-4 HOU (Favorite: Red Sox, Spread: -1.5, Total: 10.5, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 8/9/2024: 8-4 HOU (Favorite: Red Sox, Spread: -1.5, Total: 9.5, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 8/30/2023: 7-4 HOU (Favorite: Astros, Spread: -1.5, Total: 10, Favorite Moneyline: -132, Underdog Moneyline: +112)
• 8/29/2023: 6-2 HOU (Favorite: Red Sox, Spread: -1.5, Total: 10.5, Favorite Moneyline: -120, Underdog Moneyline: +102)

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