Antonio Margarito Montiel (born on March 18, 1978 in Torrance, California) is a Mexican-American retired professional boxer. He is a former WBA, WBO & IBF Welterweight Champion. Nicknamed El Tornado de Tijuana, he is known for his aggressive fighting style and his iron chin. He is currently trained by former IBF Super Featherweight Champion Roberto García. Antonio also manages IBF Lightweight Champion Miguel Vázquez. Margarito was in an incident in which his corner was caught tampering with his hand wraps prior to his bout with Shane Mosley. The hand wraps were found by the CSAC to contain sulfur and calcium which, when combined with oxygen, forms Plaster of Paris.