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.
Seattle Mariners Preview
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.
Houston Astros Preview
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.
Houston Astros @ Seattle Mariners Betting Trends: April 12, 2026
- Probable Starting Pitcher: Logan Gilbert Record this season: 0-2 ERA: 5.40
- Home Record: 0-1
- Last 5 against Astros: 2-2
Why the Seattle Mariners will win
- The Mariners have won each of their last 12 home games against teams that held a losing record.
- The Astros have lost each of their last six games.
- The Mariners have covered the run line in each of their last six Sunday home games against American League opponents.
- The Astros have failed to cover the run line in five of their last six games.
- The Mariners have led after 3 innings in each of their last six Sunday games against the Astros.
- The Mariners have won the first inning in each of their last four home games against AL West opponents.
- The Astros have trailed after 5 innings in five of their last six games.
- Probable Starting Pitcher: Cody Bolton Record this season: 0-0 ERA: 3.68
- Road Record: 0-0
- Last 5 against Mariners: –
Why the Houston Astros will win
- The Astros have won each of their last 11 day games against AL West opponents following a road loss.
- The Mariners have lost five of their last six games as favorites after playing the previous day.
- The Mariners have failed to cover the run line in each of their last six games as favorites after playing the previous day.
- The Astros have covered the run line in 11 of their last 12 games as underdogs following a road loss.
- The Astros have led after 5 innings in five of their last six day games against American League opponents that held a losing record.
- The Mariners have trailed after 3 innings in three of their last four home games.
Total Runs Facts
- Each of the Astros’ last 10 games against American League opponents have gone OVER the total runs line.
- Eight of the Mariners’ last nine games as home favorites have gone OVER the total runs line.
- The ‘Inning 1 OVER 0.5 runs’ market has hit in each of the Astros’ last six games as underdogs.
- The ‘Inning 1 UNDER 0.5 runs’ market has hit in each of the last six day games between the Astros and Mariners at T-Mobile Park.
Seattle Mariners Player Prop Facts
- Cal Raleigh has hit a home run in three of the Mariners’ last four games against the Astros.
- Logan Gilbert has recorded seven or more strikeouts in each of his last nine home appearances against AL West opponents.
- Victor Robles has recorded at least one hit in each of his last nine appearances in day games against teams that held a losing record.
- Logan Gilbert has recorded a win in three of his last four appearances with the Mariners as favorites against AL opponents.
Houston Astros Player Prop Facts
- Yordan Alvarez has hit a home run in each of the Astros’ last three games against AL West opponents.
- Jose Altuve has recorded at least one hit in each of his last 18 road appearances against the Mariners after playing the previous day.
- Yordan Alvarez ranks T1st in the league in Home Runs (6) this season.
Matchup/League Facts
- The Mariners rank 29th in the league for batting average this season (.193).
- The Mariners rank 29th in the league for slugging percentage this season (.323).
- The Astros rank 1st in the league for runs scored this season (92).
- The Astros rank 1st in the league for hits this season (147).
Astros vs Mariners Prediction
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.