Richard J. Castillo
- Bats Right, Throws Right
- Height 5' 10", Weight 180 lb.
Richard Castillo began his professional career in 2007 at 17 years old.
Castillo was signed by scout Gregorio Gonzalez for the St. Louis Cardinals at age 17. For the 2007 VSL Cardinals, he went 3-2 with two saves and a 1.72 ERA, third-best in the league. He allowed a .183 opponent average. He split 2008 between the Quad Cities River Bandits (8-4, 2.62) and the Palm Beach Cardinals (1-0, 1.13). He began 2009 back with Palm Beach and was put on Spain's preliminary roster for the 2009 Baseball World Cup. He played in the Cardinals system through 2013, reaching Triple A for the first time that year. In 2014, he pitched unsuccessfully in the Colorado Rockies system, going 3-12 with a 5.41 ERA at Double A. After playing just winter ball in 2015, he joined the independent ranks for 2016.