Starting Pitching Rumors: Cardinals, Castillo, Mariners, AL Central - MLB Trade Rumors
Report: Blue Jays interested in Reds' Castillo, Gray, Mahle before lockout
Luis Castillo extension: Mariners agree to five-year deal with righty, reportedly worth $108 million
SB Nation Offseason GM Simulation - Cincinnati Reds edition - Red Reporter
ICYMI, Cincinnati Reds Pitcher Luis Castillo Has Been Traded to the Seattle Mariners, Sports & Recreation, Cincinnati
2022 Key Mariners Moments: Trading for Luis Castillo
Mariners Reportedly Acquiring Luis Castillo from the Reds for a Huge Package (UPDATE) - Bleacher Nation
Why time is now for Reds to trade 2 potential All-Stars
Mariners get All-Star RHP Castillo for prospects Marte and Arroyo, 2 RHP - Seattle Sports
Luis Castillo News - ESPN
Mariners acquire All-Star starter Luis Castillo from Reds for four prospects
Mariners Acquire Luis Castillo - MLB Trade Rumors
Luis Castillo Drawing Early Trade Interest - MLB Trade Rumors