Jesús Castillo Aguilera (June 17, 1944 – January 15, 2013) was a Mexican boxer.
Better known as Chucho Castillo, he was the Lineal, WBA and WBC Bantamweight world champion in 1970.Castillo and Rubén Olivares sustained one of the most important rivalries in the history of Mexican boxing.
Castillo was described by the boxing book The Ring: Boxing In The 20th Century as quiet and sullen, while Olivares was more of an outgoing partygoer, according to the book.
The personality contrast made fans very interested in their matches.