The forward was injured when he was hit by Washington Capitals defenseman Radko Gudas during the first period of Anaheim's 3-2 loss at Honda Center on Friday.
"Nick's injury is very similar to [defenseman] Josh Manson's injury, so the timeline is between 6-10 weeks," Ducks general manager Bob Murray said Sunday. "The huge variable will be the first two weeks of rehabilitation."
Murray said he was initially worried that Ritchie had a torn ACL because of the way his knee bent when Gudas hit him with a hip check after he had released the puck on a first-period play in the corner.
Ritchie has 10 points (three goals, seven assists) in 27 games. He's been part of the third line with center Adam Henrique and right wing Ondrej Kase in recent weeks. Coach Dallas Eakins put Max Comtois into Ritchie's spot for Anaheim's game at the Winnipeg Jets on Sunday, a 3-2 loss at Bell MTS Place.
