Houston Astros vs Seattle Mariners Prediction – 7/20/2025
The Houston Astros and Seattle Mariners close out their three-game series at T-Mobile Park on Sunday. This game has significant implications in the AL West. The Astros’ lead in the AL West is down to three games after the Mariners took the first two games of this weekend series. A sweep for the Mariners would tighten things up even further. Here, I break down this game and give you my Astros vs Mariners prediction to help you determine whether or not that sweep will play out.
Our Astros vs Mariners Pick
Pick: Seattle Mariners to win
Confidence: ★★★★☆
Bonus Bets For the Game: Click the Claim Bonus button below to claim our Legendz Sportsbook promo code and get your 500 GC, 3 SC, and 50% first purchase bonus!
Pitching form: Hunter Brown gets the start for Houston today. He is 9-4 with a 2.43 ERA in 2025. He will be opposed by Bryan Woo of the Mariners. Woo is 8-4 and has a 2.75 ERA. Both of these pitchers are delivering at an All-Star level this year and a matchup between them should be electric stuff.
Bullpen usage: Both bullpens had to work hard last night in a game that went 11 innings. The bullpen that can recover from that the best will give their team a great chance to win this game.
Recent team streaks: The Astros have lost three games in a row coming into today’s action. Seattle has won five games in a row and have pulled to within three games of the Astros in the AL West standings.
Best Player Props
Player
Prop
Cal Raleigh
Home Runs (Over 0.5)
Jose Altuve
Total Bases (Over 1.5)
Bryan Woo
Strikeouts (Over 6.5)
Betting Trends & H2H
Seattle now leads the season series between these teams 5-4 after last night’s 11-inning win.
The over/under is 1-1 between these teams in the first two games of this three-game set.
Seattle has scored 13 runs combined over their last two games against the Astros.
Astros vs Mariners Model Projection
Score Projection: Seattle 5 – Houston 4
Win Probability: Seattle 50.2%, Houston 49.8%
Final Thoughts
Both starting pitchers have the potential to take this game over for their respective teams. But I am going to back Bryan Woo to do that at home for the Mariners. Seattle is playing better baseball than Houston right now, and that should continue with the Mariners grabbing a series sweep and inching closer to Houston in the standings.
Jay Sanin is a sports bettor, writer and broadcaster from New York. He is an avid New York Knicks fan and is no longer ashamed to admit it. He is also an avid New York Giants fan, and is very ashamed to admit it. His top sports to handicap are the NBA, WNBA and men’s tennis for some reason. He has watched more UAlbany Great Danes basketball than anyone should consume.
Affiliate Disclosure ATS.io features affiliate links to licensed online casinos, sportsbooks, and gambling platforms. That means if you click on them and end up signing up or making a deposit, we might earn a commission at no extra cost to you. We only work with licensed and reputable online casinos, social casinos and sportsbooks. Our content whether it’s reviews, guides, or betting tips is written with the goal of being honest, helpful, and based on real experience. While we do earn through affiliate partnerships, it doesn’t affect our recommendations. If a site isn’t safe or doesn’t meet our standards, we won’t promote it. Simple as that. We also take responsible gambling seriously. We encourage all our readers to gamble safely, set limits, and know when to take a break. Have questions? Feel free to reach out. We’re always happy to chat.
Affiliate Disclosure ATS.io features affiliate links to licensed online casinos, sportsbooks, and gambling platforms. That means if you click on them and end up signing up or making a deposit, we might earn a commission at no extra cost to you. We only work with licensed and reputable online casinos, social casinos and sportsbooks. Our content whether it’s reviews, guides, or betting tips is written with the goal of being honest, helpful, and based on real experience. While we do earn through affiliate partnerships, it doesn’t affect our recommendations. If a site isn’t safe or doesn’t meet our standards, we won’t promote it. Simple as that. We also take responsible gambling seriously. We encourage all our readers to gamble safely, set limits, and know when to take a break. Have questions? Feel free to reach out. We’re always happy to chat.
Jay Sanin is a sports bettor, writer and broadcaster from New York. He is an avid New York Knicks fan and is no longer ashamed to admit it. He is also an avid New York Giants fan, and is very ashamed to admit it. His top sports to handicap are the NBA, WNBA and men’s tennis for some reason. He has watched more UAlbany Great Danes basketball than anyone should consume.
Home›MLB Picks›Houston Astros vs Seattle Mariners Prediction – 7/20/2025
Manage Consent
To deliver optimal experiences, we use cookies to gather device data. Your consent enables us to process information such as browsing habits. Withdrawing consent may affect the site’s functionality.
Functional Always active
Technical storage or access is essential to provide the requested service or facilitate communication over the network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
he storage or access is only for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
Storage or access is needed to create user profiles for ads or track users across websites for marketing.