 On 13 July Moffat scored twice to give Houston a 2–1 win over the New England Revolution.On 1 September he scored in the 90th minute to give the Dynamo a 1–1 draw with Chicago.On 13 September 2013, Moffat was traded to Seattle Sounders FC for Servando Carrasco and a second-round pick in the 2014 MLS SuperDraft.