Freddy Castillo (born June 15, 1955) is a Mexican former professional boxer who competed from 1971 to 1985.
Known as "Chato Loco", Castillo turned pro in 1971 and won the WBC light flyweight title with a TKO win over Luis Estaba in 1978.
He lost the belt in his first defense later that year to Netrnoi Sor Vorasingh by split decision.
He later moved up in weight and in 1982 won the WBC and The Ring flyweight titles with a decision win over Prudencio Cardona.
[1] He lost the titles in his first defense to Eleoncio Mercedes by split decision.