[5] Castain made a non-official debut for Puerto Rico on 22 April 2017, when she started against American college Notre Dame Fighting Irish.
She was the top goalscorer for the Boricuas at the 2018 CONCACAF Women's Championship qualification, scoring five times.
[6] Scores and results list Puerto Rico's goal tally first Castain has a twin sister called Morgan, who played college soccer for Fresno State University.
This biographical article related to women's association football in Puerto Rico is a stub.
You can help Wikipedia by expanding it.This biographical article related to women's soccer in the United States is a stub.