Brunet was one of four blueliners selected by the Sabres at the draft in Las Vegas and played with Amerks defenseman Vsevolod Komarov, winning a Memorial Cup with Drummondville in the QMJHL in 2024. In 2025, the 21-year-old played 60 games for the Voltigeurs, and doubled his offensive totals, with 32 points (8 goals, 24 assists). After being dealt to Victoriaville in the offseason, the blueliner took a step back offensively with 26 points (2 goals, 24 assists) in 54 games.
