Murray, 33, had a goal and two assists in 14 games for the Pittsburgh Penguins last season after being acquired from the San Jose Sharks (three assists in 29 games). He had two goals and an assist in 15 games during the Stanley Cup Playoffs for the Penguins.
“Douglas Murray is an experienced defenseman with good size and is an seasoned veteran. He will bring a physical dimension to our team and is a significant addition to our group of defensemen," Canadiens general manager Marc Bergevin said in a statement. "We are happy to have him join our organization for the upcoming season."