Updated

Denver, CO (SportsNetwork.com) - Colorado Avalanche goaltender Semyon Varlamov has been sidelined once more by a groin injury, this one suffered in Monday's practice session.

"He had an MRI and they saw that there was a groin problem. They think it'll be a couple weeks. That's all I can say for now," said Avs head coach Patrick Roy following Tuesday's morning practice prior to a game against Nashville.

The 26-year-old Russian backstop has struggled to a 4-6-5 record and 3.22 goals-against average in 15 appearances (13 starts) this season. He has missed nine games in two separate stints already this year due to groin problems.

Calvin Pickard is the likely substitute for Varlamov. The 22-year-old, who began the season with Lake Erie of the American Hockey League, has gone 3-4-0 with a 2.49 GAA in seven NHL appearances.