Segundo Castillo, a Peruvian midfielder, had spells at Unión Buenos Aires, Sport Boys and Lanús. He passed away in 1993.
| Surname | Castillo |
| Name | Segundo |
| Nationality | Peru |
| Birthplace | Callao, Peru |
| Birth Date | 17 July 1913 |
| Death Date | 1 October 1993 (80 years old) |
| Position | Midfielder |
| AKA | Segundo Castillo Varela"Titina" |
Unión Callao
Independiente Medellín
Universitario
Deportivo Municipal
Magallanes
Lanús
Sport Boys
Unión Buenos Aires