ESPN's Passan: Next logical step for Mariners is locking up Luis Castillo - Seattle Sports
MLB trade deadline: Mariners acquire Luis Castillo from Reds for huge prospect haul
Fantasy baseball: Luis Castillo elite option this week on the mound - Sports Illustrated
Luis Castillo 'ready to go' for first start with the Mariners
Mariners Acquire Luis Castillo In Blockbuster Trade With The Reds – Field2Court
Mariners excited for addition of Luis Castillo, who will join team Monday
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Castillo, early power send Mariners past Cole, Yankees 7-3
How Frankie Montas, Athletics impacted by Mariners-Reds Luis Castillo trade – NBC Sports Bay Area & California
Mariners Acquire Luis Castillo from Reds in Blockbuster Deal - Metsmerized Online
Seattle Mariners make big splash, acquire right-hander Luis Castillo from Cincinnati Reds
Luis Castillo looks to extend impressive start as Mariners face Cubs
MLB Trade Rumors: Reds Open to Discussing Luis Castillo, Tyler Mahle Deals, News, Scores, Highlights, Stats, and Rumors
Luis Castillo traded to Mariners by Reds for 4 prospects