After leaving Sunderland in 2005, Arca joined Middlesbrough on a free transfer. He was a key player in the team that reached the 2006 FA Cup Final, where they lost 3-1 to West Ham United. Arca made over 100 appearances for Middlesbrough before joining Stoke City in 2008.
Mastering the Julio Arca Arsenal: A Quiz on the Argentinian Football Maestro