The Houston Astros are -125 favorites to best an ice cold Seattle Mariners team that has dropped eight of its past 10 games.
With Houston playing its best ball of the season, my Mariners vs. Astros predictions and MLB picks are happy to back the home team at a very reasonable price.
Who will win Mariners vs Astros today: Houston Astros (-125)
Emerson Hancock is somewhat of a home merchant. He owns a 3.26 xFIP in Seattle compared to a 4.71 xFIP on the road.
He’ll have his hands full against a Houston Astros side sitting eighth in wOBA vs. righties over the past month – in a more favorable hitting environment, at that.
The Seattle Mariners slot 28th in wOBA against righties over the same period, and rank tied for last in runs scored.
They’ll make life a little easier on Hayden Wesneski, giving the Astros a strong chance of getting a win.
Back Houston to -135.
COVERS INTEL: Hancock's 24th percentile ranking in hard hit percentage is likely to lead to trouble against an Astros attack sitting fifth in SLG vs. RHP the past three weeks.
Mariners vs Astros Over/Under pick: Over 8.5 (-110)
Hancock has not only benefited from plenty of starts in Seattle, but a relatively soft schedule.
Just four of 16 appearances have come against Top-10 offenses in ISO vs. righties. He didn’t hold up in those games, posting a 5.32 ERA. That includes a game where he conceded three runs to the Astros over five innings of work.
Wesneski ranks in the 16th percentile in xSLG and 12th percentile in xwOBA. Those are alarming numbers considering he has only faced the Angels, Blue Jays, and Giants – three bad offenses.
Bet the Over to -125.
Mariners vs Astros home run prediction: Taylor Trammell (+625)
Taylor Trammell is hammering the baseball. He leads the Astros in ISO and SLG while barreling the ball at an astronomical 40% clip over the last 20 games.
He is striking out a ton while chasing power, but it’s hard to argue with a sky-high barrel rate and average distance of 340 feet over that period of time.
Of the four pitches Trammell has seen at least 7% of the time, the two he owns the highest ISO against are Hancock’s two most frequent pitches vs. LHH: the fastball and sinker.
Bet to +600.
- ML/RL bets: 78-71, -8.65 units
- Over/Under bets: 76-65-6, +5.44 units
Mariners vs Astros weather
This game will be played in a dome.
Mariners vs Astros odds
- Moneyline: Seattle +105 | Houston -125
- Run line: Seattle +1.5 (-190) | Houston -1.5 (+160)
- Over/Under: Over 8.5 (-115) | Under 8.5 (-105)
Mariners vs Astros trend
Houston has won 16 of its last 22 games (+7.45 units, 26% ROI). Find more MLB betting trends for Mariners vs. Astros.
How to watch Mariners vs Astros and game info
| Location | Daikin Park, Houston, TX |
| Date | Saturday, Aug. 15, 2026 |
| First pitch | 7:10 p.m. ET |
| TV | Mariners.TV, Space City HN |
| Mariners starting pitcher | Emerson Hancock (6-7, 3.35 ERA) |
| Astros starting pitcher | Hayden Wesneski (2-0, 3.86 ERA) |
Mariners vs Astros latest injuries
Odds are correct at the time of publishing and are subject to change.
Not intended for use in MA.
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