 Estrada struggled for the second year in a row, finishing with a 7-14 record in innings.On January 25, 2019, Estrada signed a one-year contract with the Oakland Athletics.He was released on August 20.Estrada throws a four-seam fastball with an average velocity of 86-91 MPH, a curveball averaging 76-79 MPH and an 85-87 MPH cutter.