Clay Jamieson Smith (September 11, 1914 – March 5, 2002) was an American professional baseball pitcher who appeared in 18 games in Major League Baseball over two seasons for the Cleveland Indians (four games in 1938) and Detroit Tigers (14 contests in 1940). A member of the Kansas Baseball Hall of Fame, he hurled in one game of the 1940 World Series for the Tigers. During his playing career, he batted and threw right-handed, stood 6 feet 2 inches (1.88 m) tall, and weighed 190 pounds (86 kg).