Seattle Mariners vs Houston Astros Prediction, Preview and Odds - 08/15/2026

Game Time: 7:10 pm ET, Saturday, August 15, 2026

Venue:  Daikin Park, Houston, TX

Where to Watch:  MLB TV

DraftKings:  Moneyline odds:  Mariners +105, Astros -125; Over/Under:  8.5 runs

Bet365:  Moneyline odds:  Mariners +105, Astros -125; Over/Under:  8.5 runs

BetMGM:  Moneyline odds:  Mariners +105, Astros -125; Over/Under:  8.5 runs

Seattle Mariners:  57-65 (3rd place, AL West)

Houston Astros:  62-60 (1st place, AL West)

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Seattle Mariners:  3-7 last 10

Houston Astros:  5-5 last 10

The Mariners are entering this series off a win and lost their 3-game series against the New York Yankees 2-1 in their last series. They enter this game with a 57-65 record overall and have a road record of 24-36. This is the 2nd game of a 3-game series with the Astros on Saturday with the series opener still to be played on Friday. Their offense ranks 28th in the MLB with a .681 OPS. George Kirby is their starting pitcher on Friday while Emerson Hancock is making his start in this game on Saturday. He is 6-7 with a 3.35 ERA this season. His team lost their last 4 straight games this season with him making an appearance. In his last MLB regular season appearance, he allowed 2 ER, 0 HR, and 1 BB with 3 SO on 9 hits through 4.2 IP against the Tampa Bay Rays.

The Astros are entering this series off a win and won their 3-game series against the San Francisco Giants 2-1 in their last series. They enter this game with a 62-60 record overall and have a home record of 30-29. This is the 2nd game of a 3-game series with the Mariners on Saturday with the 1st game of this series still to be played on Friday. Their offense ranks 8th in the MLB with a .730 OPS. Peter Lambert is their starting pitcher on Friday while Hayden Wesneski is making his start in this game on Saturday. He is 2-0 with a 3.86 ERA this season. His team won their last 3 straight games this season with him making an appearance. In his last MLB regular season start, he allowed 3 earned runs, 2 homers, and 2 walks with 4 strikeouts on 5 hits through 7 innings pitched against the San Francisco Giants.

The current betting odds have the Astros listed as a slight favorite in this game according to Draftkings Sportsbook. The Astros have looked good in their games this season with their 62-60 record overall which has them right at the top of the AL West. They have looked good in their own ballpark too with their 30-29 home record this season. Meanwhile, the Mariners haven't looked good in their games this season with their 57-65 record overall which has them right in the middle of the AL West. They have been a terrible road team too with their 24-36 road record this year. The Astros are 5-5 in their last 10 games and haven't been at their best lately, but their pitching has been great and they have been one of the hottest teams in the league over the last month. The Mariners are 3-7 in their last 10 games and they have been in a bad slump lately. The Mariners are going with Hancock in this one and he has looked good this season. He is 6-7 with a 3.35 ERA and he hasn't been giving up many runs, but the team hasn't been having much success with him either. He only gave up 2 earned runs in his last start, but the team has lost 4 games in a row now with him starting and a big reason for that is having one of the worst offenses in MLB. The Astros are going with Wesneski in this one and he hasn't looked bad this year. He is 2-0 with a 3.86 ERA and the team has been having success with him. He did give up 3 earned runs in his last start, but the team has won 3 games in a row now with him starting and they also have the much stronger offense to lean on here. Look for the Astros to continue rolling in this one with the better offense while the Mariners continue to have trouble in their spiral. The best way to place a bet here is on the Astros to win this game. 

Mariners Astros Prediction:  Our MLB Pick for Saturday, August 15, 2026 (7:10 pm ET start time) is Astros 5 Mariners 3.

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Seattle Mariners: 238-221 (-23.1 units) on the moneyline in all games. 102-126 (-34 units) on the moneyline in road games. 43-61 (-9.5 units) on the moneyline as an underdog of +100 to +150. 8-4 OVER as a road underdog of +100 to +150.

Houston Astros: 179-154 (+5.2 units) on the moneyline against right-handed starters. 132-101 (+10.9 units) on the moneyline vs. an AL team with a slugging percentage .410 or worse on the season. 59-52 (+5.9 units) on the moneyline vs. an AL starting pitcher whose ERA is 3.70 or better. 26-16 OVER when the money line is -100 to -150.

Seattle Mariners:  C. Young (2B) Day To Day - Head. C. Sulser (RP) Fifteen Day IL - Oblique. L. Raley (RF) Ten Day IL - Elbow. J. Crawford (SS) Ten Day IL - Wrist. W. Wilson (3B) Sixty Day IL - Thumb. M. Brash (RP) Fifteen Day IL - Lat. C. Criswell (RP) Sixty Day IL - Shoulder. C. Vargas (RP) Sixty Day IL - Lat. L. Evans (SP) Sixty Day IL - Arm.

Houston Astros:  J. Altuve (2B) Day To Day - Foot. B. Matthews (CF) Ten Day IL - Knee. M. Burrows (SP) Fifteen Day IL - Elbow. C. Correa (SS) Sixty Day IL - Ankle. B. Walter (RP) Sixty Day IL - Elbow.

“This was a game of little things. A good one to come out on top of.” - Dan Wilson after his team’s win against the Yankees in their game on Thursday.

“Good teams find a way and we did. We finished strong this road trip -- [going] 3-3 -- and that’s what you want to do. That was a team coming together and grinding. We used everyone in that ‘pen who was available, and we got the big hits when we needed the most.” - Joe Espada after his team’s win against the Giants in their game on Wednesday. 

Randy Arozarena (R) LF

Julio Rodríguez (R) CF

Dominic Canzone (L) RF

Cal Raleigh (S) DH

Josh Naylor (L) 1B

Brendan Donovan (L) 2B

Weston Wilson (R) 3B

Jhonny Pereda (R) C

Leo Rivas (S) SS

Jeremy Peña (R) SS

Yordan Alvarez (L) DH

Isaac Paredes (R) 3B

Daulton Varsho (L) CF

LaMonte Wade Jr. (L) 1B

Cam Smith (R) RF

Taylor Trammell (L) LF

Nick Allen (R) 2B

Christian Vázquez (R) C

Batting Average:  Randy Arozarena (.276)

Hits:  Cole Young (116)

Home Runs:  Dominic Canzone (19)

RBI:  Cole Young (52)

Stolen Bases:  Josh Naylor (23)

Wins:  Logan Gilbert (9)

Saves:  Andrés Muñoz (21)

ERA:  Matt Brash (0.54)

Batting Average:  Yordan Alvarez (.322)

Hits:  Yordan Alvarez (140)

Home Runs:  Yordan Alvarez (35)

RBI:  Yordan Alvarez (87)

Stolen Bases:  Cam Smith (10)

Wins:  Peter Lambert (8)

Saves:  Josh Hader (17)

ERA:  Josh Hader (0.96)

Managers:

Seattle Mariners: Dan Wilson (3rd season)

Houston Astros: Joe Espada (3rd season)