CALGARY — The Calgary Flames traded veteran defenceman MacKenzie Weegar to the Utah Mammoth on Wednesday, two days before the NHL’s trade deadline.
In return, the Flames receive defenceman Olli Maatta, forward prospect Jonathan Castagna and three second-round picks in the 2026 NHL draft. The selections originally belonged to the Mammoth, New York Rangers and Ottawa Senators.
Weegar needed to waive his no-trade clause to complete the transaction, which was announced hours after the Flames and Mammoth reportedly agreed to a deal pending his approval.
The 32-year-old from Ottawa has three goals and 18 assists in 60 games this season. The two-way blueliner led the Flames in ice time this season but held a minus-35 differential on a Calgary (24-29-7) team set to miss the playoffs for a fourth straight year.
The deal is not a rental for the Mammoth. Weegar remains under contract through the 2030-31 season at a US$6.25-million salary cap hit.
Maatta, meanwhile, owns a $3.5-million salary for two years beyond this season. The 31-year-old Finn has one assist in 22 games, spending much of the campaign as a healthy scratch.
Castagna, a 20-year-old centre from Toronto, has 14 goals and 18 assists in 29 games this season at Cornell University. The then-Arizona Coyotes drafted him in the third round, 70th overall, at the 2023 draft.
Weegar enjoyed a career year with the Flames in 2023-24, producing 20 goals and 52 points in 82 games. He joined the Flames alongside Jonathan Huberdeau in the July 2022 blockbuster trade that sent Matthew Tkachuk to the Florida Panthers.
Calgary also dealt longtime defenceman Rasmus Andersson to the Vegas Golden Knights in January and could continue to be a seller ahead of Friday’s deadline.
This report by The Canadian Press was first published March 4, 2026.
The Canadian Press
