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MLB · Final

Mariners Sweep Astros with 6-1 Victory

Sunday, April 12, 2026, 4:10 PM ET · T-Mobile Park

Seattle Mariners 6, Houston Astros 1, final. Our MLB picks are sealed as a hash before kickoff and settled in public, losses included.

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Quick answers

Who won Houston Astros vs Seattle Mariners?

Seattle Mariners beat Houston Astros 6-1 at T-Mobile Park on April 12, 2026.

Who was favored in Houston Astros vs Seattle Mariners?

Seattle Mariners were the favorite at DraftKings, moneyline -193 (about 66% implied). The favorite won.

The Seattle Mariners secured a decisive 6-1 victory over the Houston Astros, completing a four-game series sweep. This win not only highlights the Mariners' strong performance against their division rivals but also marks their continued dominance over the Astros in recent matchups, with Seattle winning the last seven out of ten encounters.

In terms of recent form, the Mariners have shown resilience with a record of 4-6 over their last ten games, currently riding a one-game winning streak. They averaged 3.1 runs scored per game while allowing 3.2 runs during this stretch. In their last five games, they managed a record of 2-3, scoring an average of 3.0 runs and allowing 2.6 runs. In contrast, the Astros are struggling, having lost their last five games and posting a 3-7 record in their last ten outings. They averaged 5.6 runs scored but allowed a concerning 6.5 runs per game during this period.

At home, the Mariners hold a balanced record of 3-3, while they have struggled on the road with a 1-3 record. The Astros, meanwhile, have been particularly poor away from home, with an 0-5 record in their last five away games, contributing to their overall away record of 3-2.

The Mariners' injury list includes Brendan Donovan, who is on the 7-Day IL due to a concussion, Cole Wilcox on the 15-Day IL with an oblique injury, and Matt Brash, Will Wilson, and Emerson Hancock, all on the 60-Day IL for various injuries. The Astros are also dealing with significant injuries, including Brice Matthews on the 60-Day IL for a knee issue, Mike Burrows on the 15-Day IL with an elbow injury, and Carlos Correa and Brandon Walter, both on the 60-Day IL for ankle and elbow injuries, respectively.

The matchup took place at T-Mobile Park under favorable conditions for baseball, and the Mariners capitalized on their home advantage. The scoring began early in the first inning when Randy Arozarena singled to center, bringing Donovan home. The Mariners continued to build their lead, scoring two runs in the second inning and another three in the third, highlighted by a sacrifice fly from Donovan and a triple from Raley in the sixth inning that brought in two more runs.

The Astros managed to get on the board in the fifth inning with a home run from Diaz, but it was not enough to challenge the Mariners, who maintained control throughout the game. The Mariners' victory probability was firmly in their favor, finishing at 1.0, reflecting their dominant performance.

According to DraftKings, the Mariners were favored at -193, with a spread of -1.5 and a total set at 8.0 runs. The odds for the over were -103.0, while the under was priced at -117.0. The moneyline for the Mariners was -193, while the Astros stood at +159.

Overall, this game showcased the Mariners' ability to capitalize on scoring opportunities and maintain a strong defensive presence, while the Astros will need to regroup and address their struggles as they head into their next series.

Odds

BookSpreadTotalMoneyline
DraftKingsSEA -193 8 o -103 / u -117 Houston Astros +159 · Seattle Mariners -193

What these prices pay on $100 · What these numbers mean

Injury report

  • Brendan Donovan7-Day ILConcussionSeattle Mariners
  • Cole Wilcox15-Day-ILObliqueSeattle Mariners
  • Matt Brash60-Day-ILLatSeattle Mariners
  • Will Wilson60-Day-ILThumbSeattle Mariners
  • Emerson Hancock15-Day-ILGroinSeattle Mariners
  • Brice Matthews60-Day-ILKneeHouston Astros
  • Mike Burrows15-Day-ILElbowHouston Astros
  • Carlos Correa60-Day-ILAnkleHouston Astros
  • Brandon Walter60-Day-ILElbowHouston Astros

Recent form

Seattle Mariners

Last 10: 4-6Streak W13.1 scored · 3.2 allowed per game3-3 at home

  • W9-6vs Houston AstrosApr 11
  • L2-3at Texas RangersApr 8
  • L1-2at Texas RangersApr 7
  • L0-1at Los Angeles AngelsApr 5
  • W3-1at Los Angeles AngelsApr 4
  • L0-5vs New York YankeesApr 1
  • W2-1vs New York YankeesMar 31
  • L5-6vs Cleveland GuardiansMar 29
  • W5-1vs Cleveland GuardiansMar 28
  • L4-6vs Cleveland GuardiansMar 27

Houston Astros

Last 10: 3-7Streak L55.6 scored · 6.5 allowed per game0-5 away

  • L6-9at Seattle MarinersApr 11
  • L1-5at Colorado RockiesApr 8
  • L7-9at Colorado RockiesApr 7
  • L10-12at AthleticsApr 5
  • L4-11at AthleticsApr 4
  • W9-2vs Boston Red SoxApr 1
  • W8-1vs Boston Red SoxMar 31
  • W9-7vs Los Angeles AngelsMar 29
  • L2-6vs Los Angeles AngelsMar 28
  • L0-3vs Los Angeles AngelsMar 26

Standings

TeamGames behindLostStreakWin %Won
Houston-69W1.50771
Texas271L1.49369
Seattle574W2.47166
Athletics1786W1.38654
Los Angeles1887L2.37953

How the scoring went

  1. 1st Inning0-1Arozarena singled to center, Donovan scored, Naylor to second.
  2. 2nd Inning0-2Rodríguez walked, Crawford scored, Young to second, Canzone to third.
  3. 3rd Inning0-3Young walked, Arozarena scored, Crawford to second, Raley to third.
  4. 3rd Inning0-4Donovan hit sacrifice fly to right, Raley scored, Crawford to third.
  5. 5th Inning1-4Diaz homered to left (372 feet).
  6. 6th Inning1-6Raley tripled to right, Naylor scored and Arozarena scored.

Win probability

Above the line favours Seattle Mariners, below favours Houston Astros.

Venue

  • T-Mobile ParkSeattle, Washington
  • Attendance29071
  • OfficialsClint Vondrak, Todd Tichenor, Austin Jones, Adam Hamari

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Fixture data from the league feeds. The report was written from the recorded facts for this game and nothing else.