McDonaugh separated the same shoulder last April and missed the last five regular-season games when he was hit by Vancouver forward Alex Burrows. McDonaugh has no goals and three assists in 10 games this season for New York (5-4-1).
Defenseman Kevin Klein was also injured in the game against Winnepeg, suffering a foot contusion. He will not play in Monday's game against the St. Louis Blues and will be re-evaluated later this week.
"A couple of younger players are getting the opportunity at playing a bigger role," Rangers head coach Alain Vigneault said. "You expect a full team effort moving forward — and that's what I thought we got last night. We're going to need a team effort tomorrow defensively."
The Rangers will be without their top four defenseman for the time being. Defenseman Dan Boyle has been out since Oct. 9 with a broken hand and just resumed skating on Sunday and defenseman John Moore is serving a five-game suspension for his hit to the head of Minnesota Wild center Erik Haula.
- Scooby Axson