Houston finish top of the Western Conference. He did not play in Houston's two playoff games. In continental play, Ianni made 2 appearances in the 2008 CONCACAF Champions' Cup, helping the Dynamo reach the semifinal, where they lost to Saprissa 3–0 on aggregate, and five appearances in 2008–09 CONCACAF Champions League group stage, helping Houston finish 2nd in their group. He also made 3 appearances in the 2008 North American SuperLiga, helping the Dynamo reach the final, where they lost 6–5 to the New England Revolution in a penalty shoot-out. Seattle Sounders FC On January 26, 2009, Houston traded Ianni to the Seattle Sounders FC in exchange for a conditional pick in the 2010 MLS SuperDraft. He made his Sounders debut on May 16, 2009, a 1–1 draw with FC Dallas. On July 11 Ianni scored his first goal for the Sounders off a bicycle kick to give Seattle a 2–1 win against his former club Houston Dynamo. The goal was named the MLS Goal of the Week and was nominated for the 2009 MLS Goal of the Year. He ended the regular season with 1 goal and 2 assists in 17 appearances, helping the Sounders finish 3rd in the Western Conference and qualify for the playoffs. Ianni made 1 appearance in the playoffs as Seattle lost to Houston 1–0 on aggregate in the first round. He also made 5 appearances in the U.S. Open Cup, including a start in the final, a 2–1 victory over D.C. United. During the 2010 season, Ianni made 25 MLS regular season appearances, a career high, as the Sounders finished 4th in the Western Conference and qualified for the playoffs. He appeared in both legs of their matchup with the Los Angeles Galaxy, but Seattle lost 3–1 on aggregate. Ianni made 3 appearances during the Sounders run in the 2010 Open Cup. He started the final as Seattle beat the Columbus Crew 2–1 to win back to back Open Cup titles. He also made 2 appearances in the CONCACAF Champions League. After being on the bench for the first two games, Ianni made his first appearance of the 2011 on March 25, getting the start in a 1–1 draw with Houston. He scored his first goal of the season on May 28 in a 2–1 win for Seattle against Real Salt Lake. Ianni ended the regular season with 1 goal from 16 appearances, helping