Denver Clayton Lemaster (born February 25, 1939 in Corona, California) was a Major League Baseball pitcher. He began his career when he was signed by the Milwaukee Braves. He spent 1958-early 1962 in the minors. He joined the Braves in 1962, and pitched his first game on June 15th. He played with the Braves until 1967. They had moved to Atlanta by that time. After the 1967 season he was traded to the Astros with Denis Menke. The Braves were given Sonny Jackson and Chuck Harrison. Lemaster played with the Astros for four years. He was then sold to the Montreal Expos, but was released halfway through the season.