Mariners vs Astros Prediction, Odds, Moneyline, Spread & Over/Under for April 8

Odds updated as of 9:11 p.m.

MLB action on Tuesday includes the Seattle Mariners playing the Houston Astros.

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

Mariners vs Astros Game Info

• Seattle Mariners (4-7) vs. Houston Astros (4-6)
• Date: Tuesday, April 8, 2025
• Time: 9:40 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) - 1-1, 3.00 ERA vs Framber Valdez (Astros) - 1-1, 3.75 ERA

The Mariners will give the nod to Luis Castillo (1-1) versus the Astros and Framber Valdez (1-1). Castillo has a record of 1-1-0 ATS in two starts with a spread this season. Castillo's team lost his only start as a favorite this season. Valdez has started two games with set spreads, and the Astros went 1-1-0. The Astros have always been the moneyline underdog when Valdez starts this season.

Mariners vs Astros Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (53%)

Mariners vs Astros Moneyline

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

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

• Mariners versus Astros, on April 8, has an over/under of 7, with the over being -105 and the under -115.

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

Mariners vs Astros Betting Trends

• The Mariners have been favorites in seven games this season and have come away with the win three times (42.9%) in those contests.
• This year Seattle has won three of seven games when listed as at least -120 on the moneyline.
• The Mariners' games have gone over the total in three of their 11 opportunities.
• In 11 games with a line this season, the Mariners have a mark of 3-8-0 against the spread.
• The Astros are 2-3 in games they were listed as the moneyline underdog (winning 40% of those games).
• When it has played as a moneyline underdog with odds of +102 or longer, Houston has a 1-3 record (winning only 25% of its games).
• The Astros have played in 10 games with a set over/under, and have combined with their opponents to go over the total three times (3-5-2).
• The Astros have gone 4-6-0 against the spread this season.

Mariners Player Leaders

• Jorge Polanco is hitting .417 with two home runs and a walk. He has an on-base percentage of .440 and a slugging percentage of .667.
• Polanco hopes to build on a six-game hitting streak in this matchup. During his last six games he is batting .417 with two home runs, a walk and 10 RBI.
• Julio Rodriguez has eight hits, which leads Seattle batters this season. He's batting .195 with four extra-base hits. He's also slugging .463 with an on-base percentage of .327.
• He ranks 136th in batting average, 86th in on-base percentage and 63rd in slugging among qualifying hitters.
• Dylan Moore is batting .381 with a .667 slugging percentage and two RBI this year.
• Moore heads into this game with five games in a row with at least one hit. During his last five outings he is hitting .429 with two home runs, three walks and two RBI.
• Cal Raleigh has two home runs, three RBI and a batting average of .205 this season.

Astros Player Leaders

• Jose Altuve has put up a team-best OBP (.400) and slugging percentage (.571), and paces the Astros in hits (15, while batting .357).
• Including all qualifying hitters in MLB, he is 12th in batting average, 30th in on-base percentage and 32nd in slugging percentage.
• Altuve hopes to build on a three-game hitting streak in this matchup. During his last five outings he is batting .333 with two home runs, a walk and four RBI.
• Jeremy Pena has two home runs and two walks while hitting .143. He's slugging .314 with an on-base percentage of .231.
• Including all qualifying hitters, his batting average puts him 172nd, his on-base percentage ranks 166th, and he is 134th in slugging.
• Yordan Alvarez has a double, a home run and seven walks while batting .176.
• Isaac Paredes has a double and five walks while hitting .216.

Mariners vs Astros Head to Head

• 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)
• 5/28/2024: 4-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -130, Underdog Moneyline: +110)

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