Houston (56-41) vs Seattle (52-45)
July 19, 2025 at 09:40 PM EDT
The Line: Betting Odds: Seattle +1.5 — Over/Under: +8
In this article, we will formulate an Astros vs Mariners prediction for this MLB game on Saturday, July 19, 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 (56-41, 23-22 Away) concluded the first half of the season with five defeats in six games. After being swept by the Cleveland Guardians, the Astros lost to the Texas Rangers, both at home. Houston opened the current series in Seattle with a 6-1 defeat. Isaac Paredes drove in the lone run for the Astros, while Brandon Walter took the loss after allowing one run on three hits with seven strikeouts and one walk in 6.0 innings.
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 .274 batting average, 17 home runs, and 52 RBI this season.
The projected starting pitcher for the Astros is Lance McCullers Jr., who is 2-4 in ten starts this season, with a 6.48 ERA and 1.66 WHIP in 41.2 innings.
Seattle Mariners Betting Preview
The Seattle Mariners (52-45, 26-21 Home) swept the Pittsburgh Pirates without allowing a single run in three games, were swept by the New York Yankees, and swept the Detroit Tigers on the road to end the first half of the season. Seattle beat the Astros 6-1 in Game 1 of the current series on Friday. Five different batters registered an RBI, while Luis Castillo got the win after allowing no runs on three hits with seven strikeouts and two walks across 6.2 innings of work.
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 .259 batting average, 38 home runs, and 83 RBI this season.
Logan Evans will take the mound for the Mariners on Saturday. The 24-year-old right-hander has a 3-3 record in nine starts this year with a 3.75 ERA and 1.35 WHIP in 50.1 innings.
Total Runs Facts
Each of the Mariners’ last five home games after playing the previous day have gone UNDER the total runs line.
Six of the Astros’ last eight night games against AL West opponents have gone OVER the total runs line.
The ‘Inning 1 UNDER 0.5 runs’ market has hit in each of the Astros’ last six night games at T-Mobile Park.
The ‘Inning 1 UNDER 0.5 runs’ market has hit in six of the Mariners’ last seven night games.
Matchup/League Facts
The Mariners rank T26th in the league for doubles this season (138).
The Mariners rank 5th in the league for steals this season (86).
The Astros rank 2nd in the league for opponent batting average this season (.225).
The Astros are one of only two teams in the league to rank top 10 in both strikeouts and walks allowed this season.
Astros vs Mariners Prediction
The teams have traded wins in the past couple of years, each recording five in the previous ten H2H encounters. This season, the series is tied at 4-4. I am not sure about the winner here, but I am pretty sure we will have at least eight runs, so I am going with Over. Lance McCullers Jr. is not the same pitcher after so many injuries, and that is evident this season. He allowed 18 runs in his last four starts, and the in-form Seattle should score 3+ off of him with ease. Logan Evans, on the other hand, is enjoying a nice rookie season, but he did surrender ten runs in his previous three starts. I am backing both offenses to score multiple runs in the first five innings. Go with Over.