Pittsburgh Penguins coach Dan Bylsma announced on Tuesday that defenseman Matt Niskanen will miss 2-to-4 weeks with a lower-body injury.
Niskanen has one goal and two assists in five games this season. He suffered the injury during Sunday's game against the Ottawa Senators.
The 26-year-old tallied four goals and 17 assists in 75 games with the Penguins in 2011-12.
