John Rocker, American baseball player
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 a member of the Cleveland Indians, Texas Rangers, and Tampa Bay Devil Rays for one season each. He last played professionally for the Long Island Ducks of the Atlantic League of Professional Baseball in 2005.

Rocker received notoriety during his career for making controversial statements, which began with a 1999 Sports Illustrated interview and continued after his retirement. Following the conclusion of his baseball career, Rocker competed on Survivor: San Juan del Sur with girlfriend Julie McGee, placing 16th.