Cincinnati Reds: Luis Castillo works on slider, Kyle Farmer, Barnhart
Why the Reds didn't extend Luis Castillo before Mariners trade
Dealt an ace: An oral history of how the Reds landed All-Star Luis Castillo - The Athletic
The Baseball Analysts: Baseball Beat Archives
Reds shut down Luis Castillo after pitching nearly 170 innings
Reds: Former pitcher Luis Castillo gets Game 1 start vs. Blue Jays
Luis Castillo traded to Mariners: The starts that defined Reds career
How Luis Castillo can become an ace — Part One - Redleg Nation
Reds trade ace Luis Castillo to Seattle Mariners
Reds shut down Luis Castillo after pitching nearly 170 innings
Cincinnati Reds right-hander Luis Castillo has struggled so far
The Cincinnati Reds might have an ace in Luis Castillo - Red Reporter