 On 27 March 2010, Ruiz made one of the quickest hat-tricks ever against Sparta, with goals in the 46th, 49th and 50th minutes.On 2 May 2010, FC Twente were crowned champions of Eredivisie for the first time in their history, with a 2–0 win at NAC Breda; Ruiz scored the first goal of the match during the 23rd minute of play.He finished the season as top scorer for Twente with 24 goals in Eredivisie play.