The Athletics and New York Yankees were frequent trading partners in that era, and on June 15, , Duren, Pisoni, and Harry Simpson were sent to the Yankees for Billy Martin, Ralph Terry, Woodie Held, and Bob Martyn. Duren kept his A's uniform number of 26 with the Yankees. Duren received the first of his three All-Star selections in . He has been retroactively credited with saving 20 games in 1958, the high mark in the American League that year. In 1959, his win–loss record was much poorer, but his earned run average of 1.88 was the best of his career.