Joseph James "J.J." Killeen (born October 22, 1981) is an American professional golfer. Killeen was born in San Diego, California. He played college golf at Texas Christian University. He turned professional in 2005. Killeen played on mini-tours, including the (winning once) and the NGA Hooters Tour before joining the Nationwide Tour in 2008. Killeen made it to the final round of 2010 Q School, but missed earning a tour card by a single stroke. Killeen made his PGA Tour debut at the Sony Open in Hawaii, where he finished T38.