Cyril Owen Buker (February 5, 1918 – October 11, 2011) was a Major League Baseball pitcher who played for the Brooklyn Dodgers in 1945.

He made his major league debut in relief on May 17, 1945, against the Pittsburgh Pirates at Ebbets Field.

His first major league win came in his first start, on June 21, 1945, as the Dodgers defeated the Philadelphia Phillies 9–2 at Shibe Park.

Following his Brooklyn days, Buker eventually returned to his hometown of Greenwood, Wisconsin where he began a successful coaching career, eventually being named to the Wisconsin Football and Basketball Coaches Association Hall of Fame.

His son, Tom, would later coach at the school, leading it to class C titles in boys' basketball and baseball in 1988.