MacEwen was placed on waivers Saturday, according to Chris Johnston of The Athletic.
The Devils acquired MacEwen from the Senators on Friday in exchange for Kurtis MacDermid. The 29-year-old MacEwen will head to AHL Utica if he clears waivers. He had two goals, one assist, 26 shots on net, 49 hits and 21 PIM across 21 regular-season appearances with Ottawa in 2024-25.