Bruins left winger Brad Marchand is out indefinitely with a concussion, coach Claude Julien told reporters Sunday.

Marchand suffered the injury late in the third period of Saturday's loss to the Canadiens.

Julien also announced that the team has placed defenseman Matt Irwin on waivers.

The Minnesota Wild have claimed left wing Chris Porter off waivers from Philadelphia.

The move was made Thursday before the Wild's final exhibition game against Buffalo. Porter signed a one-year, two-way contract with the Flyers but was one of their final training camp cuts. The native of Toronto has played in 173 NHL games, all with St. Louis over parts of the past six seasons. Porter played in three playoff games for the Blues last spring in the Western Conference quarterfinals against the Wild.

The 31-year-old Porter was a teammate of Wild star Zach Parise at Shattuck-St. Mary's prep school in Faribault, Minnesota, and in college with North Dakota. Porter and Parise attended each other's weddings.