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

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

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 ...

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

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

The Seattle Mariners reportedly turned down a recent trade offer for starting pitcher Luis Castillo. The following came from Bob Nightengale of USA Today in his ...

For the second game in a row, the Mariners are expected to have a Luis Castillo start a game for them. Confused? You're almost certainly not alone.

Fresh off their fourth consecutive series win, the Seattle Mariners will open up a new series with the Boston Red Sox on Tuesday afternoon at Fenway Park. The M ...

Will Luis Castillo be traded? An insider sheds light on the Seattle Mariners' stance on a Luis Castillo trade.