Colorado Avalanche captain Gabriel Landeskog will undergo knee surgery Monday and will be out indefinitely, Avalanche head coach Jared Bednar announced Saturday, according to The Athletic's Peter Baugh.

Bednar said the team is "hoping" to have the forward back for the beginning of the playoffs, but his availability won't be clear until after the surgery. The ailment is not ACL-related.

"Hopefully, he'll be available for us for the stretch line, but he's going to miss some time," he said. "It's something going on with his knee that's been bothering him for a while. It was getting worse."

Bednar added that defenseman Samuel Girard will miss four weeks.

Landeskog, 29, leads all Avalanche skaters with 30 goals in 51 games this season. Girard, 23, ranks third among Colorado blue-liners with 27 points in 56 contests.

Here's how the Avalanche's lineup looked without the duo during Saturday's practice:

Colorado currently leads the NHL with 87 points and sits atop the Central Division with a 41-13-5 record.

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