Seney, a 5'9, 156 pound winger drafted 157th overall by the New Jersey Devils in 2015 but chose to head back to Merrimack College where he played his entire collegiate career before signing a two-year deal with the Devils. He played in 51 games for New Jersey in 2018-2019, scoring 5 goals and 8 assists for the Devils before playing in Binghamton the rest of the next season. The Maple Leafs signed Seney in 2021 and he ended up skating in two games for Toronto but never registered a point; he was much more effective for the Marlies where he put up 17 goals and 42 assists while also adding 81 penalty minutes.
The Chicago Blackhawks then signed Seney in 2022-2023 and he sporadically played for the team over two seasons, registering a goal in 11 games.