David John Giusti Jr. was an American professional baseball player. He played in Major League Baseball as a right-handed pitcher from 1962 to 1977 for the Houston Colt .45's / Astros, Pittsburgh Pirates, St. Louis Cardinals, Oakland Athletics, and Chicago Cubs. Giusti played for Pirates teams that won five National League Eastern Division titles in six years between 1970 and 1975 and won the World Series in 1971.