Career
Leo was the brother of Carlos Cruz. Carlos had conquered the world Lightweight title by beating Carlos Ortiz in 1969, but lost his life in the Dominicana District of Columbia-9 air disaster the following year. Leo moved to Puerto Rico early in the 1970s, and began identifying himself as half Puerto Rican almost immediately.
He began his successful professional boxing career in Puerto Rico, with a string of wins.
Cruz in his first defense knocked out Benito Badilla of Chile in eight rounds, at Roberto Clemente Coliseum in San Juan. Then, he defeated South Korean challenger Soon-Hyun Chung, by decision in 15.
After dropping him in round eight. Also in San Juan. In his first defense at his home country, Cruz put his title on the line on August 1983 against Nicaraguan challenger Cleo Garcia at Santo Domingo.
Cruz retained the title by a decision.
Cruz attempted a comeback in 1985, winning one fight, but retiring for good after that.