Mariners vs Astros Prediction, Odds, Moneyline, Spread & Over/Under for April 9

Odds updated as of 3:11 p.m.

The MLB's Wednesday slate includes the Seattle Mariners facing the Houston Astros.

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

Mariners vs Astros Game Info

• Seattle Mariners (4-8) vs. Houston Astros (5-6)
• Date: Wednesday, April 9, 2025
• Time: 4:10 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: ROOT Sports NW and SCHN

Mariners vs Astros Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-120) | HOU: (+102)
• Spread: SEA: -1.5 (+168) | HOU: +1.5 (-205)
• Total: 7 -- Over: (-105) | Under: (-115)

Mariners vs Astros Probable Starting Pitchers

Probable Pitchers: Luis Castillo (Mariners) - 0-0, 9.00 ERA vs Hunter Brown (Astros) - 1-1, 3.00 ERA

This contest's pitching matchup is set, as the Mariners will send Luis Castillo to the mound, while Hunter Brown (1-1) will take the ball for the Astros. Castillo helped his team cover the spread in his only opportunity this season as a starter. This will be Castillo's first game as the moneyline favorite this season. Brown has started two games with set spreads, and the Astros went 1-1-0. The Astros were named the moneyline underdog for one Brown start this season -- they won.

Mariners vs Astros Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Astros win (53.2%)

Mariners vs Astros Moneyline

• Houston is the underdog, +102 on the moneyline, while Seattle is a -120 favorite at home.

Mariners vs Astros Spread

• The Mariners are 1.5-run home favorites on the runline against the Astros. The Mariners are +168 to cover, and the Astros are -205.

Mariners vs Astros Over/Under

• The over/under for the Mariners versus Astros game on April 9 has been set at 7, with -105 odds on the over and -115 odds on the under.

Bet on Seattle Mariners vs. Houston Astros on FanDuel today!

Mariners vs Astros Betting Trends

• The Mariners have been chosen as favorites in eight games this year and have walked away with the win three times (37.5%) in those games.
• This year Seattle has won three of eight games when listed as at least -120 on the moneyline.
• The Mariners and their opponents have hit the over in three of their 12 games with a total set by oddsmakers this season.
• The Mariners have posted a record of 3-9-0 against the spread this season.
• The Astros have compiled a 3-3 record in games they were listed as the moneyline underdog (winning 50% of those games).
• Houston has gone 1-3 when it has played as a moneyline underdog with odds of +102 or longer (25%).
• The Astros have played in 11 games with a set over/under, and have combined with opponents to go over the total three times (3-6-2).
• The Astros have put together a 5-6-0 record ATS this season.

Mariners Player Leaders

• Julio Rodriguez leads Seattle with eight hits, batting .178 this season with four extra-base hits. He has an on-base percentage of .315 and a slugging percentage of .422.
• Among qualifying batters in the majors, his batting average ranks 150th, his on-base percentage ranks 97th, and he is 77th in slugging.
• Jorge Polanco is batting .417 with two home runs and a walk, while slugging .667 with an on-base percentage of .440.
• Polanco has picked up at least one hit in six games in a row. In his last six outings he is hitting .417 with two home runs, a walk and 10 RBI.
• Cal Raleigh has nine hits this season and has a slash line of .205/.314/.386.
• Dylan Moore is batting .308 with a .400 OBP and two RBI for Seattle this season.

Astros Player Leaders

• Jose Altuve has put up an on-base percentage of .392, a slugging percentage of .532, and has 16 hits, all club-highs for the Astros (while batting .340).
• Including all qualified hitters in MLB, he ranks 18th in batting average, 38th in on-base percentage and 38th in slugging percentage.
• Altuve hopes to build on a four-game hitting streak in this matchup. During his last five outings he is hitting .292 with two home runs, two walks and four RBI.
• Jeremy Pena is batting .154 with two home runs and three walks. He's slugging .308 with an on-base percentage of .250.
• He is 164th in batting average, 153rd in on-base percentage and 140th in slugging percentage in the big leagues.
• Yordan Alvarez has a double, a home run and nine walks while batting .189.
• Isaac Paredes is hitting .214 with a double and five walks.

Mariners vs Astros Head to Head

• 4/8/2025: 2-1 HOU (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 4/7/2025: 4-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -158, Underdog Moneyline: +134)
• 9/25/2024: 8-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -148, Underdog Moneyline: +126)
• 9/24/2024: 4-3 HOU (Favorite: Astros, Spread: -1.5, Total: 7, Favorite Moneyline: -130, Underdog Moneyline: +110)
• 9/23/2024: 6-1 SEA (Favorite: Astros, Spread: -1.5, Total: 7.5, Favorite Moneyline: -132, Underdog Moneyline: +112)
• 7/21/2024: 6-4 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 7/20/2024: 4-2 HOU (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 7/19/2024: 3-0 HOU (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -110, Underdog Moneyline: -106)
• 5/30/2024: 4-0 HOU (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -132, Underdog Moneyline: +112)
• 5/29/2024: 2-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -112, Underdog Moneyline: -104)

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