Javier Castro Urdín (born 13 September 2000) is a Spanish footballer who plays for Racing de Santander as either a central defender or a right-back.
On 25 July 2019, after finishing his formation, he signed for AD Alcorcón and was immediately assigned to the reserves in the Tercera División.
[1] Castro made his senior debut on 25 August 2019, starting in a 1–0 Tercera División away win against Fútbol Alcobendas Sport.
His first team debut came the following 26 January, after coming on as a late substitute for injured Paris Adot in a 3–1 home win against SD Ponferradina in the Segunda División.
[4] Upon returning, Castro became a regular starter as Alkor achieved promotion to the second division, and scored his first professional goal on 5 November 2023, in a 3–1 home win over Racing de Santander.