Rafael Arlex Castillo (born June 6, 1980) is football midfielder plays for San Antonio FC.
He previously played for the former San Antonio Scorpions of the NASL and the Colombia national football team between 2001 and 2003.
He is known for his tenacious style of play despite his diminutive stature.
His past clubs include Real Cartagena (Colombia), Independiente Medellín (Colombia), Al-Ahly (Egypt) and Deportivo Pereira (Colombia).