Robert Joseph Guerrero is an American professional boxer. Nicknamed The Ghost, he is the current interim WBC welterweight champion. He is also a former IBF Super Featherweight world champion, a former interim WBA and WBO lightweight champion and a former two-time IBF featherweight champion. He vacated the IBF Super Featherweight belt due to his wife's battle with leukemia. Guerrero's coach is Ruben Guerrero. He is managed by both Bob Santos and Luis Decubas Jr.