Seattle Mariners Executive Vice President & General Manager of Baseball Operations Justin Hollander announced today the Mariners 2026 Opening Day roster. The Mariners open the 2026 season at T-Mobile Park tomorrow night against the Cleveland Guardians.

Find out how to watch the Mariners on Opening Day and all season long, including streaming options, cable updates, and Mariners.TV details.

Mariners Opening Day brought large crowds to Seattle’s Stadium District, boosting business for local shops and restaurants. Business owners say they can see 2–3 times more revenue on big game days and are optimistic about the season ahead. Officials are still assessing the full economic impact of the season, with more data expected.

With ROOT Sports no longer operating, the Seattle Mariners new home is Mariners.TV, with the MLB taking over local broadcast responsibilities. Tonight, you can watch the Seattle Mariners Opening Day game against the Cleveland Guardians live at 7:10 p.

The Mariners enabled a "channel finder" on their website that lets fans search by zip code to find available providers and channel information in their area.

Mariners baseball is back in Seattle as opening day kicks off with a 7:10 p.m. first pitch against the Cleveland Guardians at T-Mobile Park.

A lifelong Mariners fan embodies the spirit and tradition of Seattle baseball on Opening Day, reflecting hope and generational devotion.

SEATTLE — The Seattle Mariners have announced the team’s 2026 opening day roster. The team opens the season at T-Mobile Park tomorrow night against the Cleveland Guardians. First pitch is set for 7:10 p.m. Right-hander Logan Gilbert is slated to make his second consecutive and second career opening day start.