How to Watch Mariners at Astros (Sept. 21): Stream MLB Live, TV Channel

Logan Gilbert will take the mound against Jason Alexander as the Seattle Mariners close out a three-game series against the Houston Astros on Sunday.

The Seattle Mariners will take the field at Daikin Park for the third and final game of this three-game on Sunday against the Houston Astros. The Mariners have won the first two games of this season, claiming the series win heading into the final game. However, now they get to go fight for the three-game sweep which they could use as they look to distance themselves from the Astros in the division, looking towards the playoffs. They won on Friday night in a 4-0 shutout win as Bryan Woo pitched an excellent outing. He went five scoreless inning with seven strikeouts, allowing just one hit.

How to Watch Seattle Mariners at Houston Astros Today:

Game Date: Sunday, Sept. 21, 2025

Game Time: 7:10 p.m. ET

TV Channel: ESPN

Location: Daikin Park

Live stream Seattle Mariners at Houston Astros on Fubo: Start Watching Today!

Eugenio Suarez hit his 47th homer of the season, as three other players also went deep in the win. On Saturday, the Mariners pulled out a 6-4 win, as Cal Raleigh hit his 57th home run of the season, which passed Ken Griffey Jr. for the single-season record for Seattle. That overshadowed George Kirby’s six scoreless innings with seven strikeouts.

Logan Gilbert will take the mound to open up the third game of this series for Seattle. The right-hander comes into this game with a 5-6 record and a 3.53 ERA with a 1.04 WHIP. He has given up 96 hits with 164 strikeouts over 120 innings. Gilbert allowed two earned runs on six hits over 5.2 innings with five strikeouts against the Royals in his last start.

Houston will elect to start Jason Alexander in the last game of this series. The right-hander is 4-1 in his 2025 campaign with a 4.04 ERA and a 1.30 WHIP. He had 60 strikeouts this season over 71.1 innings pitched. Alexander took on the Texas Rangers in his last start, pitching 4.2 innings, giving up one earned run with five strikeouts and allowing five hits.

What Time Is The Game Between Seattle and Houston On?

The Seattle Mariners at Houston Astros game will take place on Sunday, Sept. 21, 2025 at 7:10 p.m. ET. Tune in and catch some great Major League Baseball action.

What Channel Is The Seattle Mariners at Houston Astros Game On?

Looking to watch this game? Fans can tune into ESPN to see the action. Make sure you subscribe to Fubo now to watch this match and many other baseball games.

Live stream Seattle Mariners at Houston Astros on Fubo: Start Watching Today!

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