The Seattle Mariners starting rotation was the team's most sure thing when spring training began. The group featured three ...

Castillo didn't factor into the decision in Saturday's Cactus League game against San Diego after giving up two runs on five hits over 4.2 innings. He struck out four.

The Seattle Mariners' path to success comes from the strength of their pitching staff, which is loaded with high-upside arms.

After the Mariners announced Logan Gilbert as the opening day starter, Luis Castillo was super happy for his teammate.

Logan Gilbert shared his honest thoughts on earning the Mariners' Opening Day starting nod over Luis Castillo.

The Mariners reassigned Castillo to minor-league camp Monday. After spending the past two seasons in Japan's Nippon Professional Baseball, Castillo returned stateside over the winter, joining the ...

I know it's just a three-inning sample in spring training, but after watching him pitch against the Cleveland Guardians on Monday, I do think it's fair to have ...

As the trade rumors surrounding him began intensifying at the Winter Meetings, Luis Castillo was so far off the grid that he didn’t hear about them immediately.

Tiering signals where the biggest drop-offs are at a position so that you can determine the most optimal time to draft said ...

Castillo (hamstring) tossed a bullpen session Monday, Ryan Divish of The Seattle Times reports. Castillo finished last season on the injured list after sustaining a Grade 2 left hamstring strain ...

Luis Sr., who taught him how to fish and throw a baseball while growing up in the nearby town of Bani about 40 minutes away. The two activities still dominate Castillo’s life, just at somewhat ...