Carroll William Sembera (July 26, 1941 – June 15, 2005) was a relief pitcher in Major League Baseball who played for the Houston Astros (1965–67) and Montreal Expos (1969–70). Sembera batted and threw right-handed. He was born in Shiner, Texas.In a five-season career, Sembera posted a 3–11 record with a 4.70 ERA and six saves in 99 games pitched.Sembera made his debut with the Houston Astros in 1965 at the age of 23.