2005-01-21 Juan Diaz w rsc 9 Billy Irwin, Reliant Centre, Houston, Texas, USA - WBA
2005-01-21 Juan Diaz w rsc 9 Billy Irwin, Reliant Centre, Houston, Texas, USA - WBA. Referee: Earl Morton. Swarming all over the veteran challenger from the off, sending in punches from head to body with venom, it was no surprise when Diaz (134½) dropped the Canadian with a left hook to the jaw in the second. Although Irwin (133½) beat the count he was under the cosh for the remainder of the session, and from there on in had no defence against an opponent who never left him alone. The end was inevitable. With the by now pedestrian Irwin being battered along the ropes without reply in the ninth, his right eye closed tight, he was rescued by the referee at 1.27.
Due to defend against Lakva Sim in December, Diaz, who was doing a degree course in political science, was left without an opponent when the Mongolian pulled out injured two weeks before the fight was due to take place.