Boston receives a hard-hitting centerman in Kastelic. A 2019 fifth-round draft pick of Ottawa at 125th overall, Kastelic skated in 63 games for the Sens last season, recording five goals and five assists for a 10-point total. Kastelic appeared in 144 regular season games over the course of three seasons with the Senators between 2021-2024.
With Ullmark heading to Ottawa, Boston had a hole to fill in their goaltending tandem. Joonas Korpisalo is headed their way, where he will be the one to slot in. The 30-year-old Finnish netminder joined the Senators on July 1, 2023, signing a 5-year contract as a free agent. In his season with the Sens, Korpisalo appeared in 55 games, posting a .890 save percentage and a 3.27 goals against average. Korpisalo recorded his first win with the Senators in a 5-2 victory over Tampa Bay on October 15, 2023. Prior to his stint with the Senators, Korpisalo also laced up for the Los Angeles Kings and the Columbus Blue Jackets, the latter of whom drafted him 62nd overall in the third round of the 2012 NHL Entry Draft.
Also headed Boston's way is the 25th overall draft pick in this weekend's upcoming 2024 NHL Entry Draft. It's a homecoming for the pick that was originally the Bruins’ to begin with. The Senators acquired the 25th overall pick from the Detroit Red Wings in exchange for Alex DeBrincat. The trade also saw Ottawa acquire forward Dominik Kubalik, prospect defenceman Donovan Sebrango, and Detroit's 2024 fourth-round pick. The Red Wings had originally acquired the pick from Boston in a trade that sent Tyler Bertuzzi to Boston.