Houston Astros (78-79) vs. Seattle Mariners (73-84) September 23, 2026 10:00 pm EDT The Line: Seattle Mariners -127 / Houston Astros +105; Over/Under: 7.5 (Get latest betting odds)
The Houston Astros and the Seattle Mariners meet Wednesday in MLB action from T-Mobile Park. We will look at this from a betting perspective and determine the best bets for this game. Here’s a Houston Astros vs. Seattle Mariners prediction.
The Houston Astros will send out Ethan Pecko for the start here and Pecko is 1-0 with a 3.77 ERA and 19 strikeouts this season. Seattle will trot out George Kirby and Kirby is 9-11 with a 4.24 ERA and 143 strikeouts this season.
The Houston Astros come into this game looking to add on to their 7-0 win over Seattle last time out to sit at 78-79 this season. After this series, the Astros will head on the road for a series against the Athletics.
Yordan Alvarez leads the Astros across the board with a team-high 172 hits, 41 home runs, and 102 RBIs while adding 32 doubles and a triple so far this season. Isaac Paredes has added 142 hits with 26 doubles, a triple, 23 home runs, and 91 RBIs, while Jose Altuve has contributed 126 hits with 24 doubles, 2 triples, 16 home runs, and 45 RBIs on the year. Christian Walker has logged 122 hits with 25 doubles, a triple, 26 home runs, and 83 RBIs, while Cam Smith has chipped in 103 hits with 17 doubles, 6 triples, 20 home runs, and 54 RBIs for Houston up to this point in the season.
The Seattle Mariners come into this game looking to rebound from their loss at the hands of the Astros on Tuesday to slip to 73-84 this season. After this series, the Mariners will head home for a game against the Los Angeles Angels.
Josh Naylor and Randy Arozarena tie for the Mariners’ team lead with 154 hits each, with Naylor contributing 22 doubles, 10 home runs, and 54 RBIs while Arozarena paces Seattle across the board with a team-high 26 home runs and 76 RBIs along with 31 doubles and a triple so far this season. Julio Rodriguez has added 142 hits with 25 doubles, 21 home runs, and 66 RBIs, while Cole Young has logged 138 hits with 19 doubles, 4 triples, 17 home runs, and 65 RBIs on the year. Cal Raleigh has contributed 79 hits with 15 doubles, 23 home runs, and 68 RBIs, and Luke Raley has chipped in 59 hits with 9 doubles, a triple, 15 home runs, and 39 RBIs for Seattle up to this point in the season.
I’m on the Mariners here. I’m still not sold on Ethan Pecko’s game and this is a high pressure, high leverage spot for such a young arm. The Mariners aren’t headed to the postseason but I still think there’s more than enough here for the Mariners to come in and play spoiler so I’ll back Seattle in this one.