Astros vs Mariners Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 14

Odds updated as of 7:12 p.m.

On Friday in MLB, the Houston Astros are up against the Seattle Mariners.

Before checking out the MLB betting lines on FanDuel Sportsbook, we've got you covered, in terms of the vital information regarding this game.

Astros vs Mariners Game Info

• Houston Astros (62-60) vs. Seattle Mariners (57-65)
• Date: Friday, August 14, 2026
• Time: 8:10 p.m. ET
• Venue: Daikin Park -- Houston, Texas
• Coverage: SCHN and Mariners.TV

Astros vs Mariners Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: HOU: (-118) | SEA: (+100)
• Spread: HOU: +1.5 (-205) | SEA: -1.5 (+168)
• Total: 8.5 -- Over: (-110) | Under: (-110)

Astros vs Mariners Probable Starting Pitchers

Probable Pitchers: Peter Lambert (Astros) - 8-6, 3.09 ERA vs George Kirby (Mariners) - 8-9, 3.68 ERA

The Astros will give the nod to Peter Lambert (8-6) against the Mariners and George Kirby (8-9). Lambert's team is 12-8-0 against the spread in his starts this season. Lambert's team has been victorious in 62.5% of the games he's started as the moneyline favorite with a record of 5-3. When Kirby starts, the Mariners have gone 7-15-0 against the spread. The Mariners have yet to be named a moneyline underdog when Kirby starts this season.

Astros vs Mariners Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Astros win (50.7%)

Astros vs Mariners Moneyline

• Seattle is the underdog, +100 on the moneyline, while Houston is a -118 favorite at home.

Astros vs Mariners Spread

• The Mariners are 1.5-run favorites against the spread for this matchup with the Astros. The Mariners are +168 to cover, while the Astros are -205 to cover as a 1.5-run underdog on the runline.

Astros vs Mariners Over/Under

• An over/under of 8.5 has been set for Astros-Mariners on Aug. 14, with the over being -110 and the under -110.

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

Astros vs Mariners Betting Trends

• The Astros have won in 25, or 52.1%, of the 48 contests they have been named as odds-on favorites in this year.
• This season Houston has been victorious 18 times in 39 chances when named as a favorite of at least -118 on the moneyline.
• The Astros and their opponents have gone over the total this season in 65 of their 122 opportunities.
• The Astros are 60-62-0 against the spread in their 122 games with a line set by sportsbooks this season.
• The Mariners have won six of the 20 games they were the underdog on the moneyline this season (30%).
• Seattle is 3-8 (winning only 27.3% of its games) when playing as a moneyline underdog of +100 or longer.
• In the 121 games oddsmakers have set an over/under for the Mariners, they have combined with opponents to go over the total 58 times (58-57-6).
• The Mariners are 42-79-0 against the spread this season.

Astros Player Leaders

• Yordan Alvarez leads Houston with 140 hits and an OBP of .436, plus a team-best slugging percentage of .621. He's batting .322.
• Among qualifying hitters, he is first in batting average, his on-base percentage ranks first, and he is first in slugging.
• Isaac Paredes is batting .254 with 21 doubles, a triple, 15 home runs and 46 walks. He's slugging .415 with an on-base percentage of .346.
• Among qualifying batters, his batting average places him 74th, his on-base percentage 50th, and his slugging percentage 83rd.
• Christian Walker has 102 hits this season and has a slash line of .236/.316/.449.
• Jeremy Pena has been key for Houston with 85 hits, an OBP of .348 plus a slugging percentage of .474.

Mariners Player Leaders

• Randy Arozarena has accumulated a team-high OBP (.370) and slugging percentage (.452), while pacing the Mariners in hits (116, while batting .276).
• Including all the qualified hitters in MLB, he is 33rd in batting average, 18th in on-base percentage and 45th in slugging percentage.
• Arozarena heads into this matchup on a three-game hitting streak. In his last five games he is batting .158 with two home runs, two walks and three RBIs.
• Josh Naylor is batting .264 with 17 doubles, 10 home runs and 39 walks. He's slugging .372 with an on-base percentage of .331.
• His batting average is 56th among all qualified players, his on-base percentage ranks 77th, and he is 121st in slugging.
• Julio Rodriguez is hitting .257 with 16 doubles, 19 home runs and 39 walks.
• Cole Young leads his team with a .404 slugging percentage.

Astros vs Mariners Head to Head

• 5/14/2026: 8-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 5/13/2026: 4-3 HOU (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 5/12/2026: 10-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -200, Underdog Moneyline: +168)
• 5/11/2026: 3-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -154, Underdog Moneyline: +130)
• 4/13/2026: 6-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -178, Underdog Moneyline: +150)
• 4/12/2026: 6-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -190, Underdog Moneyline: +160)
• 4/11/2026: 8-7 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -152, Underdog Moneyline: +128)
• 4/10/2026: 9-6 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 9/21/2025: 7-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -148, Underdog Moneyline: +126)
• 9/20/2025: 6-4 SEA (Favorite: Astros, Spread: -1.5, Total: 8, Favorite Moneyline: -108, Underdog Moneyline: -108)

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