Detroit Red Wings captain Henrik Zetterberg underwent back surgery and will be out eight weeks, the team said Friday.
Flames defenseman Mark Giordano will miss six to eight weeks due to a broken ankle.
Boston Bruins' Gregory Campbell said that his recovery time is projected to be six to eight weeks and that he should be ready for training camp.
The Carolina Hurricanes say goalie Cam Ward will miss six to eight weeks with a sprained knee ligament.
Philadelphia Flyers general manager Paul Holmgren said Thursday that winger Scott Hartnell could be out four to eight weeks after breaking the first metatarsal in his left foot.
New Jersey Devils defenseman Henrik Tallinder has been diagnosed with acute thrombophlebitis (a blood clot) of the lower leg and will be out six to eight weeks, general manager Lou Lamoriello announced.
Sharks forward Martin Havlat will miss up to eight weeks following surgery Thursday to repair a partial tear in a tendon in his left hamstring.
Flames backup goalie Henrik Karlsson will be sidelined six-to-eight weeks because of a torn ligament in his right knee.
Detroit Red Wings forward Patrick Eaves is scheduled to have surgery on his broken jaw Monday and is expected to be out six to eight weeks.
Maple Leafs defenseman Mike Komisarek will be out at least eight weeks because he needs surgery for a broken arm.
Chicago Blackhawks star Patrick Kane has a fractured left wrist and will need 6-8 weeks to recover after surgery.
Rangers forward Vinny Prospal underwent successful knee surgery on Monday.
Anaheim Ducks defenseman Andy Sutton will be out for six to eight weeks after undergoing surgery on his broken right thumb.
Bruins defenseman Dennis Seidenberg is out eight weeks after wrist surgery.
Chicago Blackhawks defenseman Brian Campbell is expected to miss 7-8 weeks
Ottawa left wing Nick Foligno will be out six to eight weeks after breaking his right leg against the Montreal Canadiens.