On 11 December 2015, FC Dallas selected Urruti with the first pick of the 2015 MLS Re-Entry Draft. On 6 March 2016, Urruti made his debut for Dallas in the opening match of the 2016 season, scoring once in a 2–0 win against the Philadelphia Union. He scored his second goal for Dallas on 19 March in a 2–0 victory against the Montreal Impact. On 26 March, Urruti made it 3 goals in 4 games after scoring in a 3–0 win against D.C. United. On 8 July he scored once to give Dallas a 1–0 win over the San Jose Earthquakes. In Dallas's next match, Urruti scored again in a 3–1 victory against the Chicago Fire. On 31 July, Urruti scored for the 3rd straight MLS match to help Dallas beat the Vancouver Whitecaps 2–0. He made it four consecutive MLS games with a goal on 13 August, scoring once in a 2–2 draw with Sporting Kansas City. Urruti ended the regular season with 30 appearances, 9 goals and 4 assists, helping Dallas win the Supporters' Shield for having the most points during the regular season. In Dallas playoff matchup with the Seattle Sounders, Urruti started in both legs and scored in the second, but Dallas lost 4–2 on aggregate. Urruti also helped Dallas have a memorable run in the U.S. Open Cup during the 2016 Season. On 29 June he scored in extra time to give Dallas a 2–1 over the Colorado Rapids. On 13 September Urruti scored twice as Dallas beat the New England Revolution 4–2 in the final. Urruti also made one appearance in the group stage for the 2016–17 CONCACAF Champions League.
