Klesla lay on the ice for 5 minutes and was attended to by trainers before a doctor was led across the ice to examine him. Klesla was face down on the ice before being helped off, not putting any weight on his left leg.
Klesla was just inside the St. Louis zone when he reached up to collect a puck about 2:30 into the game. As he turned to play the puck, he was hit from behind by Jackman and fell awkwardly. Klesla's left knee was pinned against the boards as he went down.
Coach Ken Hitchcock did not disclose the nature of the injury after the game.
"He's getting a MRI in the morning," Hitchcock said. "That's all we know right now. We're hoping for the best."