Diego Milito
Castro made his professional debut in 2014 when he was substituted for Diego Milito in a 4-0 defeat to Tigre. His second appearance came in a defeat to Atlético de Rafaela, 2 to 0. In spite of having played in no further games in the tournament, he won the national title with "La Academia". In the reserve tournament Racing were runners-up to Rosario Central and Castro scored 11 goals in 15 games.