Osniel Castillo is a 19-year-old Cuban baseball player who has signed an international free agent contract with the Chicago White Sox. Originally from Matanzas, Cuba, Castillo stands out for his speed and defensive versatility, especially in center field. He is considered a promising prospect, with a speed rating between 55-60 on a scale of 80, placing him above average. During the 2024 U-18 National Championship, he led the field in stolen bases, highlighting his ability to create danger on base.

With his arrival in the Chicago organization, Castillo will seek to develop his full potential in the minor league system with a view to making his debut in Major League Baseball (MLB) in the coming years.