Montreal got a 2020 fourth-round draft pick and freed up $950,000 under the salary cap in completing their second trade Sunday. The Canadiens earlier traded center Andrew Shaw to Chicago.
The trades freed up $4.85 million in cap space for Montreal one day before the NHL's free-agency signing period opens.
Deslauriers is a hard-hitting left wing who combined for 12 goals and 19 points in 106 games over two seasons with Montreal. Overall, the 28-year-old has 24 goals and 49 points in 317 career games. He spent his first four NHL seasons with the Buffalo Sabres.