From TheChels.info - The Chelsea Football Club Wiki
|Full Name||Juan Familia-Castillo|
|Date of Birth||13 January 2000|
|Place of Birth||Amsterdam, Netherlands|
|Chelsea career||2016 -|
Juan Castillo is a defender or midfielder currently playing in Chelsea's Academy team.
Juan joined Chelsea from Ajax as a 16 year-old.
Juan's Chelsea career began tentatively, being used as a bit-part player in the first half of the season as he settled into a new country and a new club. As Jody Morris began to utilise a 3-4-3 formation more often as the campaign went on, Castillo became a force as the left wing-back in that setup, turning in influential performances that helped the club towards a treble success in the Southern section, the Merit Stage, and the FA Youth Cup.
Juan has captained the Netherlands at Under-16 level and represented them at the European Under-17 Championships in 2017. He is also eligible to represent the Dominican Republic.
Youth, Reserve and Under-21 Football
Juan's scholarship began in July 2016 and he signed a professional contract on his 17th birthday to run until the end of the 2018-19 season.