Mariners lock up SP Luis Castillo to long-term extension
Cincinnati Reds need to sign Luis Castillo to a contract extension
Reds trade ace Luis Castillo to Seattle Mariners
MLB Trade Rumors and News: Reds reportedly discussing Luis Castillo - MLB Daily Dish
Luis Castillo trade grades: Mariners deal for another ace from Reds
If the Yankees want a deadline arm, Luis Castillo's an appealing option - Pinstripe Alley
Reds: Luis Castillo has ruined any chance of long-term contract extension
Reds shut down Luis Castillo after pitching nearly 170 innings
As deadline nears, it's time for Cincinnati Reds to pay the piper