Houston Astros (77-79) vs. Seattle Mariners (73-83) September 22, 2026 9:40 pm EDT The Line: Seattle Mariners -149 / Houston Astros 123; Over/Under: 7.5 (Get latest betting odds)
In this article, we will formulate a Astros vs Mariners Prediction for this MLB matchup on Tuesday, September 22 nd in the opening game of this series. Let’s take a look at the prediction for this MLB matchup.
The Seattle Mariners have a 73-83 record this season and are sitting in the 3rd place of the AL West. They have a 40-35 home record and are coming off a 2-1 road win against the Rockies. They will face the Angels next.
The Seattle Mariners have a .232 batting average this season, .312 OBP and .380 Slugging percentage. Seattle’s pitching staff has a 4.19 ERA and 1.26 WHIP. Randy Arozarena is the team’s best hitter with a .279 batting average, adding a team-high 76 RBI and a team-high 26 home runs.
Logan Gilbert (R) is the projected starting pitcher for the Mariners, and he has a 12-10 record, 3.69 ERA and 1.06 WHIP.
The Houston Astros have a 77-79 record this season and are sitting in the 2nd place of the AL West. They have a 38-37 away record and are coming off a 2-4 home loss against the Braves. They will face the Athletics next.
The Houston Astros have a .240 batting average this season, .313 OBP and .410 Slugging percentage. Houston’s pitching staff has a 4.53 ERA and 1.34 WHIP. Yordan Alvarez is the team’s best hitter with a .313 batting average, leading the team in RBI with 99 and adding a team-high 40 home runs.
Cristian Javier (R) is the projected starting pitcher for the Astros, and he has a 2-6 record, 5.31 ERA and 1.46 WHIP.
The Mariners are 8-2 in their last 10 meetings against the Astros and have won their last three meetings in Seattle.
In this Astros vs Mariners Prediction, the Mariners are coming as -145 home favorites. Both teams have something to play for and I like the Mariners at home with Gilbert on the mound, who has been dominating the Astros in his recent starts against them. Javier on the other hand, has a 5.31 ERA and 1.46 WHIP this season and the Astros are 2-7 in their last 9 games and their bullpen has been terrible lately, as well as their offense. Take the Mariners to win this one at home.