Conrad Seth Cardinal (born March 30, 1942) is an American former professional baseball pitcher who appeared in six games in Major League Baseball for the Houston Colt .45s in 1963. Born in Brooklyn and of Jewish descent, he attended Valley Stream High School in Valley Stream, New York. Cardinal threw and batted right-handed; he was listed as 6 feet 1 inch (1.85 m) tall and 190 pounds (86 kg).