Houston Astros (56-42) vs. Seattle Mariners (53-45)
July 20, 2025 4:10 pm EDT
The Line: Seattle Mariners -123 / Houston Astros 101; Over/Under: 6.5
(Get latest betting odds)
In this article, we will formulate a Mariners vs Astros prediction for this MLB game on Sunday, July 20, at T-Mobile Park in Seattle, Washington. Let’s take a look at the prediction for this MLB matchup.
Houston Astros Betting Preview
The Houston Astros (56-42, 23-23Away) ended the first half of the season with five losses in six games. They lost the b2b series at home; first, they were swept by the Guardians, and then defeated by the Rangers. Houston added two more losses in the current series against Seattle, losing 6-1 and 7-6 in extra innings. Christian Walker led the offense in that narrow defeat last night, while Lance McCullers Jr. pitched for 2.2 innings in a no-decision, allowing four runs on five hits with one strikeout and three walks. Hector Neris took the loss.
This year, the Astros average 4.32 runs per game (17th in the MLB) on a .257/.322/.408 triple-slash. When it comes to pitching, the Astros’ staff has a 3.63 ERA (7th) and 1.16 WHIP (1st). Jose Altuve leads the Astros with a .279 batting average, 17 home runs, and 53 RBI this season.
The projected starting pitcher for the Astros is Hunter Brown, who is 9-4 in 19 starts this season, with a 2.43 ERA and 0.96 WHIP in 115.0 innings.
Seattle Mariners Betting Preview
The Seattle Mariners (53-45, 27-21 Home) swept the Pittsburgh Pirates, were swept by the New York Yankees, and swept the Detroit Tigers to close the first half of the season. Now, the M’s have another chance to get a new sweep following 6-1 and 7-6 wins over the Astros. In last night’s victory. Dominic Canzone led the offense with two RBI, while Logan Evans pitched for 4.0 innings in a no-decision, allowing two runs on six hits with five strikeouts and three walks. Eduardo Bazardo was credited with the win.
This season, the Mariners average 4.71 runs per game (8th in the MLB) on a .250/.326/.418 triple-slash. When it comes to pitching, the Mariners’ staff has a 3.86 ERA (14th) and 1.25 WHIP (16th). Cal Raleigh leads the Mariners with a .256 batting average, 38 home runs, and 83 RBI this season.
Bryan Woo will take the mound for the Mariners on Sunday. The 25-year-old right-hander has an 8-4 record in 18 starts this year with a 2.75 ERA and 0.93 WHIP in 114.2 innings.
Mariners vs Astros Prediction
The Mariners won six of the previous ten H2H encounters, including three of the last five, while this season, Seattle leads 5-4. I am going with Over in this one because I don’t like a low total of 6.5 runs. Also, seven of Seattle’s last ten games went Over, which was the case in six of Houston’s previous ten. Although I think that Brown and Woo are phenomenal pitchers, one of them will have to make a mistake or two and open up this tilt. My bet is on Brown, who has been struggling recently and allowing ten runs in his last two starts.
