Morris scored his first Major League Soccer goal for the Sounders on April 16, 2016, against the Philadelphia Union. He then went on to score in his next three consecutive games, matching the Seattle rookie scoring record, his next goal then surpassed the rookie goalscoring record which had been set by Steve Zakuani in 2009. He has since helped his team to win the MLS Cup after a run from ninth place into fourth, along with the help of Nicolas Lodeiro, a new midseason acquisition made by Seattle.