Athletics vs Seattle Mariners Live Stream: How to Watch MLB

On Monday night, American League West foes the Athletics and Seattle Mariners meet for the first time in 2026.

In divisional action in Major League Baseball on Monday night, the Athletics (11-11) visit the Seattle Mariners (10-13) at T-Mobile Park to begin a three-game American League West series. This is the first meeting between these two division opponents this year. Last season the Mariners narrowly snuck out a win in the season series taking seven of 13 games. That marked five years in a row the Mariners have won the head-to-head season series against the A’s, and they’ve also done so in 11 of the last 13 seasons.

How to Watch Athletics vs Seattle Mariners Today:

Game Date: Monday, April 20, 2026

Game Time: 9:30 p.m. ET

TV Channel: Seattle Mariners, MLB.TV – Athletics

Location: T-Mobile Park

Live Stream the Athletics vs Seattle Mariners game: Start watching now!

As the Mariners look to start on the right foot against the Athletics again, they’ll send righty Emerson Hancock to the mound. Hancock is 2-1 with a 2.28 ERA this year. The Athletics will counter with righty J.T. Ginn, who has a 3.31 ERA but is yet to record a decision this season.

This will be the second divisional series in a row for the Mariners. Over the weekend they hosted the Texas Rangers and won the final two games of that three-game set, with a 7-3 win on Saturday and 5-2 victory on Sunday. In Sunday’s win Rob Refsnyder, Randy Arozarena, and J.P. Crawford all hit home runs.

The Athletics were at home this weekend as well, hosting the Chicago White Sox. They won one game in that series, a 7-6, 11-inning win on Saturday.

What Time Is The Athletics vs Mariners Game On?

The Athletics vs Seattle Mariners game will take place on Monday, April 20, 2026 at 9:30 p.m. ET. Which AL West team will start the head-to-head season series with a win?

What Channel Is The Athletics vs Seattle Mariners Game On?

All of the action in this game can be found on Seattle Mariners, MLB.TV – Athletics. Make sure you subscribe to Fubo now to watch this matchup, as well as numerous other sports leagues. 

Live Stream the Athletics vs Seattle Mariners game: Start watching now!

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