JoJo Díaz’s Boxing Ambition: Olympic Roots and World Titles
Joseph “JoJo” Diaz Jr. changed his career on January 30, 2020, by taking Tevin Farmer’s IBF super featherweight title. Diaz had spent much of the night pressing forward, working the body and forcing the champion to fight at his pace. After 12 rounds, he had a unanimous decision and his first world championship.
From Olympic bantamweight to contender
Raised in South El Monte, California, Diaz represented the United States at the 2012 London Olympics as a bantamweight. He turned professional later that year and developed into a featherweight contender with a busy, pressure-driven style. A stoppage of Hugo Partida in 2015 brought him the vacant NABF featherweight belt, while wins kept him in line for bigger nights.
A title run marked by hard choices at the scales
Diaz first challenged for a major world title against Gary Russell Jr. in 2018, losing a unanimous decision for the WBC featherweight championship. Later that year he defeated Jesus Rojas, but missed weight and could not claim Rojas’s WBA title. At super featherweight, he rebuilt his position and finally broke through against Farmer, taking the IBF belt with the kind of sustained pressure that had become his trademark.
His reign ended in another difficult weigh-in: Diaz came in over the limit before his February 2021 draw with Shavkatdzhon Rakhimov and lost the title on the scales. Moving up to lightweight, he beat Javier Fortuna for the WBC interim championship. That earned him a shot at Devin Haney’s full WBC title, but Haney won their December 2021 fight by unanimous decision.
Diaz’s path has crossed Olympic competition, missed-weight setbacks, and championship-level opponents across three divisions. His win over Farmer remains the clearest snapshot of what he can do: keep coming, invest in the body, and make an elite champion work every minute.
Sources: USA Boxing Olympic team roster; IBF: Diaz wins the title; Premier Boxing Champions: Russell–Diaz result; WBC: Diaz’s interim title win and Haney challenge; Bad Left Hook: Rakhimov draw and title loss. Explore more in our boxing archive.
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Article Tags
Joseph “JoJo” Diaz Jr., Boxing, Boxing History, Championship Boxing
