The first manager appointed was Harry Thompson in July 1949, soon after the club turned professional. In a nine-year spell he led the team to the Southern League title in 1953, as well as the Southern League Cup in 1953 and 1954. He was replaced by Arthur Turner in 1958, who would become the longest-serving manager in the club's history, serving more than a decade in charge. Turner led United to back-to-back Southern League titles, of which the second, in 1962, resulted in their election to the Football League. For the next 24 years, the only manager to guide the club to promotion was Denis Smith, who won promotion from the Second Division in 1996. Ramón Díaz, the club's first and only non-British manager, took charge for five months between December 2004 and May 2005. Jim Smith returned as manager in 2006, the year that Oxford United were relegated to the Football Conference after 44 years in the Football League. Having missed out on promotion in the 2006–07 season, Smith resigned and Darren Patterson was promoted to the post on 9 November 2007.