John Loy Rocker (born October 17, 1974) is a former American relief pitcher who played six seasons in Major League Baseball (MLB), primarily with the Atlanta Braves. Making his major league debut in 1998 as a member of the Braves, with whom he played four seasons, he was also briefly a member of the Cleveland Indians, Texas Rangers, and Tampa Bay Devil Rays. He last played professionally for the Long Island Ducks of the Atlantic League of Professional Baseball in 2005.