 After CD Numancia achieved promotion to the top flight, Barkero moved to the team from Soria in July 2008.On 14 September he netted from a wonderful long-range strike in a 3–4 defeat at Real Madrid, and added four more goals in the first 12 games; he finished his first season as the side's top scorer at 12, but they were eventually relegated as second from bottom.Barkero scored 15 times for Numancia in the 2010–11 campaign, leading his team in that department in an eventual mid-table finish.