Castain was eligible to play for the United States or Puerto Rico, as she was born in Chicago to a Puerto Rican mother (her father is from California).[1]
In July 2011, Castain was called up by the United States U-20 team for a training camp.[4] Almost six years later, she committed her future to Puerto Rico.[5]
Castain has a twin sister called Morgan, who played college soccer for Fresno State University.[2] She retired because of injuries suffered and her professional commitments.[1]
References
^ abcdVázquez Muñiz, Héctor (22 April 2017). "Micaela debuta en TeamPUR, parte 2" [Micaela debuts in Puerto Rico Team, part 2] (in Spanish and English). ¡Qué Palo! Deportes. Retrieved 12 May 2018.