 He was selected in the squad for the 2003 Rugby World Cup and started in two pool games, against and , but suffered a fractured fibula during the game against Italy and had to return home, being replaced by Ospreys teammate Paul James.He returned from injury in time to start three games in the 2004 Six Nations Championship; he also started in both Tests against and came on as a replacement against on Wales's mid-year tour.Jones played in the 2004 Autumn Internationals but a dislocated thumb, sustained during a Heineken Cup match between the Ospreys and Munster in January 2005, meant that he was unavailable for the 2005 Six Nations Championship, in which Wales achieved the Grand Slam.