Houston Astros (6-9) vs. Seattle Mariners (6-9) April 12, 2026 4:10 pm EDT The Line: Seattle Mariners -156 / Houston Astros 129; Over/Under: 7.5 (Get latest betting odds)
In this article, we will formulate an Astros vs Mariners Prediction for this MLB matchup on Sunday, April 12th in the third game of this series. Let’s take a look at the prediction for this MLB matchup.
The Seattle Mariners have a 6-9 record this season and are sitting in the fourth place of the AL West. They have a 5-4 home record and are coming off an 8-7 home win against the Astros. Their previous three games were a 9-6 home win against the Astros, and a 3-0 and a 3-2 road loss against the Rangers.
The Mariners have a .193 batting average this season, .302 OBP and .323 Slugging percentage. Seattle’s pitching staff has a 3.14 ERA and 1.07 WHIP. Cole Young is the team’s best hitter with a .269 batting average. Cal Raleigh leads the team in RBI with 10, and Luke Raley adds a team‑high 3 home runs.
Logan Gilbert (R) is the projected starting pitcher for the Mariners, and he has a 1-2 record, 3.60 ERA and 0.90 WHIP.
The Houston Astros have a 6-9 record this season and are sitting in the fourth place of the AL West. They have a 1-7 away record and are coming off an 7-8 road loss against the Mariners. Their previous three games were a 9-6 road loss against the Mariners, and a 9-1 and a 5-1 road loss against the Rockies.
The Astros have a .281 batting average this season, .377 OBP and .462 Slugging percentage. Houston’s pitching staff has a 6.47 ERA and 1.68 WHIP. Yordan Alvarez is the team’s best hitter with a .360 batting average, also adding a team-high 6 home runs and leading the team in RBI with 14.
Cody Bolton (R) is the projected starting pitcher for the Astros, and he has a 5.40 ERA and 1.68 WHIP.
The Mariners are 7-1 in their last 8 meetings against the Astros and are 4-1 in their last 5 meetings in Seattle.
In this Astros vs Mariners Prediction, the Mariners are coming as -155 home favorites. The Astros have been struggling mightily with six consecutive wins and have at least 8 earned runs in five of their last six games. Astros have the worst bullpen currently in baseball and both teams are way better against righties, with 11.5 runs/9. Both games in this series had 15 total runs each, so I expect another high-scoring affair today. Take the over 7.5.