Chelsea's development squad crowned Premier League 2 champions
Our youngsters have today been awarded the PL2 title after it was confirmed by the Premier League that their league competitions would be decided on a points-per-game basis.
In his younger schoolboy days, he played in central midfield and as a winger, while also featuring at wing-back in his debut campaign as a Chelsea scholar. A former captain of Ajax and the Netherlands, he has represented his country up to Under-19 level.
Through hard work and application, he forced his way into our 2016/17 Youth Cup side as the campaign progressed, starting both legs of the semi-final and final, and scoring the ninth goal in our 9-2 aggregate thrashing of Tottenham. He ended the season with winners medals in the Youth Cup and Under-18 Premier League.
Castillo scored his first development squad goal in our Checkatrade Trophy quarter-final win over Oxford United.
In 2017/18, the Dutchman split his duties between the youth team and development squad, while also featuring in all but one game as our Under-19s were runners-up in the UEFA Youth League. He scored his first development squad goal in our Checkatrade Trophy quarter-final win over Oxford United and was a regular throughout our triumphant Youth Cup campaign.
The following season, he worked full-time with the older age groups and scored a crucial Youth League goal against Montpellier in the last-16 as we finished runners-up on the continental stage once again.
In August 2019, Castillo signed a new contract and it was announced he would be returning to Ajax, this time on loan for the season ahead. He featured predominantly for Ajax's Under-21 team starting in 23 of their 29 fixtures - from left-back he made six assists helping the team to a fourth place finish in the Dutch second division.