Castillo was the Seattle Opening Day starter for two years, but was excited for his teammate to get his shot.

Luis Alberto Castillo arrived in the United States so that he could “give everything to his son,” said his sister. Then, while scrolling on TikTok, she found out he was headed to Guantánamo.

On Thursday, the Mariners started a right-handed pitcher named Luis Castillo. On Friday, the Mariners also started a right-handed pitcher named Luis Castillo. No, they're not the same dude.

Seattle Mariners starting pitcher Luis Castillo will be out for at least two weeks with a grade-two hamstring strain, per Mariners General Manager Justin Hollander.

Mariners right-hander Luis Castillo went on the 15-day injured list on Tuesday, but GM Justin Hollander said the team believes "it's not out of the question" that he could be ready to return in ...

The Mariners listened to trade offers this offseason for starting pitcher Luis Castillo. Here's what the veteran thought about the rumors.

After a stretch of three consecutive extra-inning games left the bullpen thin, Luis Castillo gave the Mariners a much-needed quality start against the Twins.

Mariners ace Luis Castillo's nasty pitch reminded MLB fans just how difficult it is to hit a baseball.

Castillo did not appear in the Mariners' loss Wednesday, as he started Tuesday's game and logged a quality start, allowing three runs on six hits across six innings in Seattle's 10–6 win. In 23 ...

Seattle Mariners starting pitcher Luis Castillo (58) delivers a pitch against the Oakland Athletics during the fourth inning at Oakland-Alameda County Coliseum on Sept 3. / D. Ross Cameron-Imagn ...

Castillo has been a consistent force in the Mariners' rotation. However, he's the most expensive pitcher of the bunch since he's in the middle of a five-year, $108 million deal.

Over the last few days, the trade rumor mill with regards to Seattle Mariners right-hander Luis Castillo has run the full gamut. Despite the fact that the Mariners have repeatedly said they don't ...