 On November 18, 2013, it was announced that Leroux had been traded to the Seattle Reign FC for the 2014 NWSL season in exchange for Kristie Mewis, Michelle Betos and the Reign's first two picks in the 2015 draft. Ebullient Reign FC head coach Laura Harvey hailed the signing of Leroux: "One of the world's best forwards. She is a young, extraordinary talent with unlimited upside. Sydney will be the consistent goal-scoring threat that we struggled to find last season."
