Canadian American Association of Professional Baseball
On June 7, 2017, Aumont came out of retirement and signed a one-year deal with the Ottawa Champions of the Canadian American Association of Professional Baseball. He would make his debut in the second game of a doubleheader against the Rockland Boulders. On June 28, 2017. Aumont threw the first no-hitter in Ottawa Champions history against the Dominican Republic national baseball team. During the 2017 season, he had a 5.14 ERA and 103 strikeouts in innings.