 On July 18, 2018, Powers scored a season-high 18 points in a 101-72 victory against the Phoenix Mercury.On July 24, 2018, Powers was traded to the Washington Mystics in exchange for Tayler Hill and draft picks.The Mystics finished as the number three seed with a 22-12 record, receiving a bye to the second round elimination game, the Mystics would defeat the Los Angeles Sparks 96-64.