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

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.

There are now two Luis Castillos in the Mariners' rotation -- one nicknamed "The Rock," the other "The Pebble." Here's more ...

The Mariners have reportedly made pitcher Luis Castillo "off limits" in trade talks. "One club who offered a young infielder ...

Just two days after Luis Castillo threw 92 pitches in a seven-inning gem for the Mariners, they're set to start Luis Castillo ...

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

The Seattle Mariners are giving their No. 6 starting pitcher another shot in the major leagues in a critical rubber match ...

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

Castillo (1-2) yielded six runs on seven hits and four walks over 4.1 innings Tuesday, striking out three and taking a loss against the Reds.

For the second game in a row, the Mariners are expected to have a Luis Castillo start a game for them. Confused? You're ...

Luis Castillo, who starred for the Reds across parts of six seasons, is no stranger to the pressure of performing in front of a home crowd. His time with Cincinnati was marked by impressive ...