Scuffling Seattle Mariners lose to Kansas City Royals as Luis Castillo struggles in sixth inning - ESPN
Seattle Mariners, RHP Luis Castillo agree to 5-year contract
Mariners use early homers, strong start by Luis Castillo to top Nationals 8-4 - Hawaii Tribune-Herald
Vintage Verlander silences Seattle as Astros top M's 5-1 to open key series in playoff race – KIRO 7 News Seattle
Luis Castillo trade grades: Mariners, Reds both receive 'A' for deadline's first blockbuster
Kelenic, Rodríguez, Castillo lead Mariners to 11-2 rout over A's - Newsday
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Mariners: Luis Castillo extension signals commitment to compete
Castillo and Crawford lead the Mariners to a 4-0 victory over the Diamondbacks
How the Rule 5 draft works, and which players might the Tigers add to the roster? - Bless You Boys