Why Luis Castillo's Mariners debut vs. Yankees was proof that he's the ace Seattle needed
Luis Castillo, Tyler Mahle have helped Reds starting rotation
Reiver Sanmartin - MLB News, Rumors, & Updates
Regrading the Luis Castillo trade after Reds call up Noelvi Marte
Law: Mariners go all-in for Luis Castillo, sending the Reds 2 top prospects and more - The Athletic
MLB Team Roundup: Cincinnati Reds - NBC Sports
Castillo, Votto lead Reds to 1st Fenway win since '75 Series
Cincinnati Reds Receive Worse Update on Starter Nick Lodolo - Fastball
Reds' Luis Castillo aces audition for Yankees before trade deadline
Luis Castillo's quiet confidence providing a spark for Seattle Mariners
Mariners reportedly sign pitcher Luis Castillo to 5-year, $108 million extension
10 Burning Questions: Wander Franco, Kyle Schwarber, Luis Castillo (2021 Fantasy Baseball)
Fantasy baseball pitcher rankings, lineup advice for Saturday's MLB games - ESPN
The Red Report 2020 - Luis Castillo - Red Reporter
Potential trade partner: The Cincinnati Reds - Royals Review