The Mariners are adding Mitch Garver to their Opening Day roster as their backup catcher, according to a report from Ryan Divish of the Seattle Times. That seemingly leaves catcher Andrew Knizner without a spot on the club’s roster headed into the season.

The Seattle Mariners announced their lineup and probable pitchers for Friday's Spring Breakout prospect showcase against the Milwaukee Brewers.

This one was always going to sting a little, even if it was easy enough to see coming. The Mariners officially reassigned Colt Emerson to minor league camp, and

The Seattle Mariners enjoyed a highly successful 2025 campaign, undoubtedly one of the most memorable in the history of the franchise. However, they are still pursuing the maiden World Series crown for their loyal fanbase. Julio Rodriguez is one of the ...

The Seattle Mariners' talent-laden farm system will be on full display as part of MLB's annual Spring Breakout showcase of the league's top prospects.

After much success in its first two years, Spring Breakout is back in 2026, creating a showcase-type opportunity for the best and brightest faces of the future by pitting them against other prominent prospects from other organizations.

MLB is producing regional Mariners games this season, and the national TV rotation has expanded again. Here's what to know for 2026.