Seattle Mariners pitcher Matt Brash celebrates after getting out of an inning against the San Diego Padres on Aug. 25 at T-Mobile Park. Joe Nicholson-Imagn Images

Seattle Mariners Announce 2026 Schedule, Will Open Season vs. Cleveland Guardians

Originally posted on Seattle Mariners on SI
By Teren Kowatsch | Last updated Aug 26, 2025 6:45 PM ET

SEATTLE — The Seattle Mariners are in the middle of a crucial postseason push. If the M's make it to October, it will be their second postseason berth in the last four seasons and it's third since 2001.

Entering Tuesday, Seattle trails the Houston Astros by 1.5 games in the American League West. If the Mariners manage to supplant the Astros in the division, it would be the former's first division title since 2001.

While Seattle is looking to find its way to the postseason, the MLB is already preparing for the 2026 season.

MLB released the 2026 schedules for all 30 teams Tuesday.

For the Mariners' schedule release, they got some help from the local sea otters at the Seattle Aquarium in a video posted on social media.

Behold, the sea otter. Nature’s most graceful scheduler.

To the untrained eye, these playful creatures appear to be frolicking aimlessly. But look more intently at each splash, each tumble, each flick of their whiskers. What seems like mere play is, in fact, nature’s most… pic.twitter.com/cAJ8sJHFge
— Seattle Mariners (@Mariners) August 26, 2025

Seattle will begin the 2026 season with a two-series, seven-game homestand. The Mariners will play the Cleveland Guardians from March 26-29 in a four-game series and the New York Yankees in a three-game series from March 30-April 1.

The Mariners will also have several interesting quirks to their schedule this season to mitigate the city traffic caused by World Cup taking place at Lumen Field, next door to T-Mobile Park.

Seattle will play a three-game series against the Boston Red Sox at home from June 20-21. The first two games in that set will be played as a doubleheader June 20. The Mariners will also play a three-game series against the Los Angeles Angels from June 29-July 2, with a day off in the middle of the series July 1, the same day a World Cup day is scheduled.

The Mariners 2026 schedule is out.

Couple interesting items: June 20 doubleheader vs. Boston at T-Mobile Park due to the US playing a World Cup match at Lumen Field on June 19.

Also July 1 is off day at home in middle of series vs. Angels due to World Cup as well. pic.twitter.com/HcXghZDiPB
— Tim Booth (@ByTimBooth) August 26, 2025

Seattle will close out the 2026 regular season with a two-game series against the Houston Astros from Sept. 22-23 and a four-game series against the Angels from Sept. 24-27.

The schedule is subject to change.

Opening Day at @TMobilePark! Interleague matchups! A home doubleheader!

Our 2026 schedule is here https://t.co/aM7E3LYwOU pic.twitter.com/tF6kAlIqgC
— Seattle Mariners (@Mariners) August 26, 2025

This article first appeared on Seattle Mariners on SI and was syndicated with permission.

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