Charles Walter Machemehl (born April 20, 1946) is an American former Major League Baseball pitcher. Currently a rancher and businessman in Central Texas, the graduate of Texas Christian University was drafted by the Cleveland Indians in 1968, and played for them during the 1971 season. A right-hander, Machemehl stood 6 feet 4 inches (1.93 m) tall and weighed 200 pounds (91 kg) as an active player.
In 14 Major League games, all in relief, Machemehl lost his only two decisions, but earned three saves with seven games finished. In 18⅓ innings pitched, he allowed 16 hits and 15 bases on balls, with only nine strikeouts.