The Blues announced Saturday morning that defenseman Roman Polak has been placed on injured-reserve with a lower-body injury and he will be re-evaluated in two weeks.

Polak is believed to have suffered an ankle injury in a second-period spill in Thursday's 5-1 victory over Montreal.

With about 7 1/2 minutes remaining in the middle period, Polak was backskating near the Blues' net. Montreal's Michael Bournival gave Polak a shove and he appeared to get his feet tangled with teammate Barret Jackman, causing Polak to fall to the ice, clip the post with his upper body and crash awkwardly into the boards.

Polak remained down for several minutes before skating to the bench under his own power. He remained in the game and finished with 15:24 of ice time.