Upshall out indefinitely with torn ACL
General manager Don Maloney made the announcement before Sunday's game against the Dallas Stars.
Upshall was injured in Thursday's 3-2 win over Calgary and missed Saturday night's 3-2 victory over the New York Rangers. The club said surgery will be necessary to repair the tear.
The 26-year-old right wing has a team-leading 18 goals in 49 games this season.
Copyright 2010 by The Associated Press
MORE NHL HEADLINES
- Penguins sign forward Spaling to 2-year deal
- Goalie Lehner signs extension with Senators
- Canes captain Staal has core muscle surgery
- King, L.A. agree to 3-year, $5.85 million deal