deal had yet to be struck, on January 17, 2011, he announced Portland had finally completed Cooper's transfer and that he would be joining the team pending the receipt of his International Transfer Certificate. He scored the first MLS goal for the Portland Timbers in a 3–1 loss on their MLS debut, against Colorado Rapids on March 19, 2011. He scored his third goal of the season in a 1–0 win over Real Salt Lake. This marked the Timbers first shutout win and snapped Salt Lake's 18-game unbeaten streak. New York Red Bulls On January 12, 2012, Cooper was traded to the New York Red Bulls for a first-round 2013 MLS SuperDraft pick and an undisclosed amount of allocation money. He made his MLS regular season debut with the New York Red Bulls on Sunday, March 11, and scored his first goal for the Red Bulls against FC Dallas, his former team, at FC Dallas Stadium. Cooper was the top scorer for the team during the 2012 MLS Season. FC Dallas Cooper was re-acquired by FC Dallas from New York on February 4, 2013, in exchange for allocation money. He appeared in 31 regular-season games during the 2013 season, scoring 6 goals. Seattle Sounders FC Having failed to agree to a new contract with FC Dallas, Cooper was due to be made available in the 2013 MLS Re-Entry Draft. However, on 13 December 2013, prior to the draft, Seattle Sounders FC announced that they had acquired the rights to negotiate a contract with Cooper, as well as allocation money, in exchange for midfielder Adam Moffat, and signed him to a contract on December 19, 2013. In his first season with the club Cooper helped Seattle in capturing the 2014 Lamar Hunt U.S. Open Cup scoring six goals in four games, including a two-goal, two-assist effort in the semifinals against Chicago on August 13. He was named the U.S. Open Cup Player of the Tournament. Montreal Impact On April 12, 2015, Cooper moved to Montreal Impact via MLS waivers. He made only one appearance with the club due to an injury. Cooper had trials with Orlando City SC, New York Red Bulls, Sporting Kansas City, and FC Dallas but no playing contracts were agreed. International career After the retirement of Brian McBride, Cooper was considered to be a potential long-term solution at striker for the national team. Cooper got his first