On January 15, 2016, Sonnett was selected by Portland Thorns FC as the first overall pick in the 2016 NWSL College Draft.[33][34][35][36] She made her debut with the Thorns on April 17, 2016. Her first professional goal came in the NWSL championship semi-final to bring the Thorns level with the Western New York Flash, though the Flash would go on to score the winning goal and ultimately win the championship.