According to a report from Bob Nightengale of USA Today, the M's were offered a young infielder for Castillo, but said no.

The Seattle Mariners bullpen has been arguably the most volatile unit on the team through the first 17 games of 2025. The ...

"Great to see Jake Fraley come up huge against his former team," Fanduel Sports Network analyst and National Baseball Hall of ...

ESPN's Jeff Passan addresses the Seattle Mariners reportedly turning down a trade for one of their starting pitchers, and the possibility of adding a free agent bat.

In the wake of recent injuries to Victor Robles and Ryan Bliss, the Mariners are reportedly seeing if there are deals to be ...

The New York Mets need to add an ace to the top of their pitching rotation, and a trade for Seattle Mariners pitcher Luis ...

We take a look around baseball to see how players from the 2023 and 2024 Seattle Mariners rosters are doing with their new teams.

Seattle is looking to upgrade its lineup, but is not currently interested in trading from its vaunted rotation to do so. Read ...

"I spent five years here, and being able to pitch here on that mound again was special," Castillo said Tuesday night.

Brady Singer is quickly regressing with the Reds and the Mariners should get his goat once again this afternoon, per our MLB ...

The Seattle Mariners and Cincinnati Reds play the second game of a 3-game set at Great American Ball Park Wednesday.