Johnny Leonard Roosevelt "Pepper" Martin was an American professional baseball player and minor league manager. He was known as the Wild Horse of the Osage because of his daring, aggressive baserunning abilities. Martin played as third baseman and outfielder for the St. Louis Cardinals during the 1930s and early 1940s. He was best known for his heroics during the 1931 World Series, in which he was the catalyst in a Cardinals' upset victory over the Philadelphia Athletics.
Martin was an integral member of the Cardinals' teams of the 1930s that became known as the Gashouse Gang for their roguish behavior and practical jokes. Early in his career, he was labeled by some contemporary press reports as the next Ty Cobb because of his spirited, hustling style of play. However, because his headlong attitude on the playing field took a physical toll on his body, he never lived up to those initial expectations. After the end of his playing career, he continued his career in baseball as a successful minor league baseball manager.