MacEwen, known for his physical play, split the 2022-23 season between the Philadelphia Flyers and the Los Angeles Kings, recording 10 points and 66 penalty minutes in 56 regular-season games. Senators GM Pierre Dorion praised MacEwen's character and physicality.
The 26-year-old has accumulated 13 goals, 15 assists, and 245 penalty minutes in his 186-game NHL career. MacEwen's path to the NHL was unconventional, going undrafted before earning an entry-level contract with the Vancouver Canucks in 2017.