John Carroll "Cap" Clark (September 19, 1906 – February 16, 1957) was an American professional baseball player. He played in Major League Baseball as a catcher for the Philadelphia Phillies. Born in Snow Camp, North Carolina, Clark graduated from Elon University in 1927. In 1938, his only year in Major League Baseball, he played 52 games for the Phillies, 29 of them as the starting catcher. Clark died February 16, 1957, in Fayetteville, North Carolina.