Castillo battled through five laborious innings for the M's on Sunday against the Toronto Blue Jays, earning the win, but ...

Castillo struggled against the Cincinnati Reds, going just 4.1 innings and giving up six earned runs. Unfortunately, this ...

Castillo (2-2) picked up the win Sunday at Toronto, yielding three runs on 10 hits and two walks over five innings. He struck out five. Castillo walked away with his 75th career win despite giving up ...

In addition to the starting duo, the M's also have another Julio Rodríguez in the organization "We are duplicating names left ...

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

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

Seattle Mariners starting pitcher Luis Castillo surfaced in MLB rumors this winter when the clubs fielded inquiries on the ...

Austin Hays drove in four runs in his season debut, and the Cincinnati Reds beat Luis Castillo and the Seattle Mariners 8-4.

The Mariners begin a road trip with a defeat in Cincinnati, snapping Seattle's four-game winning streak despite two home runs ...

Up until the point the Cincinnati Reds dealt him to the Seattle Mariners, Luis Castillo’s story with the club was basically ...

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

Luis Castillo vs. Jose Berrios in Toronto, with elite talents shining in major league games. Who will win this tight pitchers duel?