The Pittsburgh Penguins will lack defenceman Brian Dumoulin for at least eight weeks after he underwent left ankle surgery on Sunday.

Dumoulin left Saturday night's 5-2 loss to St. Louis in the first duration with what the team termed a lower-body injury.

Basic supervisor Jim Rutherford stated on Sunday that surgeons repaired lacerated tendons in Dumoulin's left ankle.

Dumoulin has one goal and six assists in 23 games this season. He missed out on 4 video games earlier in the season with an undefined lower-body injury.

Dumoulin joins an injured list that consists of star centre Sidney Crosby, defenceman Justin Schultz and forward Nick Bjugstad.

Previously this season, veteran rearguard Kris Letang missed out on time with a lower-body-injury while forwards Evgeni Malkin (leg) and Bryan Rust (hand) each missed out on 11 video games and Alex Galchenyuk nine contests with a lower-body problem.

In spite of the injuries, Pittsburgh boasts a 14-9-4 record and holds down the 2nd wild-card playoff area in the NHL's Eastern Conference.