William Christopher Zachary (February 19, 1944 – April 19, 2003) was an American professional baseball pitcher, a right-hander who appeared in 108 games, 40 as a starter, over a nine-year career in Major League Baseball for the Houston Colt .45s / Astros (1963–1967), Kansas City Royals (1969), St. Louis Cardinals (1971), Detroit Tigers (1972) and Pittsburgh Pirates (1973). Born in Knoxville, Tennessee, Zachary batted left-handed and was listed as 6 feet 2 inches (1.88 m) tall and 200 pounds (91 kg).