Érik Isaac Morales Elvira (born September 1, 1976 in Tijuana, Baja California, Mexico) is a Mexican professional boxer. He is the first Mexican-born boxer in history to win world titles in four different weight classes. He is a former WBC Light Welterweight Champion, WBC & IBF Super Featherweight, WBC Featherweight (x2) and WBC & WBO Super Bantamweight Champion. Morales has defeated 15 different world champions during the course of his career. He is famous for his trilogies with fellow Mexican legend three-division champion Marco Antonio Barrera and Filipino octuple champion Manny Pacquiao. He ranks #49 on ESPN's 50 Greatest Boxers Of All Time.