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.

Opening Day at T-Mobile Park features the Mariners debut of Donovan as leadoff hitter, bringing discipline and consistency to the lineup.

The 2026 debut of Sunday Night Baseball features a matchup of AL division title winners.

The Mariners entered Spring Training with one of their most complete rosters in recent memory, without many question marks and no real voids. So, perhaps it’s fitting that the club unveiled its 26-man contingent for Opening Day one day early.

Luke Raley is hitting for power again, and that could be a meaningful development for a Mariners team with big expectations.

The Mariners have made some interesting decisions as to who will hit against Cleveland Guardians southpaw Joey Cantillo

The Seattle Mariners picked their backup catcher, and it wasn't the one they gave a major league contract over the winter.

The Mariners unveil a new 2026 food lineup at T-Mobile Park, featuring local partners, unique menu items, and expanded value options.

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.

I cannot emphasize enough the degree to which I think lineup construction is overrated in the discourse relative to the difference it makes in practice. I almost don’t even want to post this. But even with that caveat,