STORY Valbuena was Venezuelan and played for the Seattle Mariners, Cleveland Indians, Chicago Cubs, Houston Astros, and Los Angeles Angels, He was a free agent at the time of his death. He was 33 years old.
Castillo played in the majors from 2004 to 2008, with the Pittsburgh Pirates, San Francisco Giants and Astros.
The crash happened after Valbuena and Castillo left the Stadium in Caracas after playing a game in the Venezuelan Professional Baseball League.
Venezuelan authorities said their car went to the opposite side of the road while trying to avoid a sliding rock.
Carlos Rivero, another baseball player, survived the accident.