 On 6 May 2019, it was announced that Fernández had signed for Major League Soccer side Portland Timbers as a Designated Player for an undisclosed fee reported to be between $10 and $12 million, a Portland Timbers record.Fernández netted two goals in his debut against the Houston Dynamo on 16 May, and scored eight goals in his first six matches for the Timbers.On 7 October 2019, it was announced that Fernández has voluntarily entered MLS' Substance Abuse and Behavioral Health Program.