The Blackhawks acquired Kimmo Timonen from the Flyers on Friday for a second-round draft pick in 2015 and a conditional fourth-round pick in 2016.

Timonen, who will turn 40 on March 18, has not played this season after doctors discovered blood clots in his lower right leg and in both lungs. He has been cleared for contact.

"Obviously this last summer when I got sick, I was back in Finland in a hospital bed, and they said you have to wait six months to see what's going to happen," Timonen told reporters on Friday night.

Blackhawks star forward Patrick Kane underwent surgery Wednesday on his fractured left clavicle and is expected to miss 12 weeks, the team announced.

Blackhawks head team physician Dr. Michael Terry and Dr. Bradley Merk performed the procedure at Northwestern Memorial Hospital.

"Patrick underwent successful surgery today to repair his left clavicle fracture," Terry said in a statement released by the team. "The procedure went very well and we anticipate a full recovery in approximately 12 weeks."

The Bruins, fighting to hold on to a playoff spot, will be without center Dasvid Krejci for four to six weeks with a partially torn MCL in his left knee, general manager Peter Chiarelli said Monday night.

The Jets will likely have to continue their drive to the postseason without Mathieu Perreault, while Drew Stafford is considered day to day.

Both forwards were injured in Winnipeg's win over Edmonton on Monday.

Coach Paul Maurice said Perreault had a "significant lower-body injury."

The Stars placed Tyler Sequin on injured reserve Saturday, less than 24 hours after he was injured on a hit that angered his coach and teammates.

The Stars announced that Seguin has a lower-body injury. Coach Lindy Ruff told reporters on Saturday that the 23-year-old center has a knee injury and could miss two to four weeks, though sources told ESPN's Pierre LeBrun that timeline could stretch to three to six weeks. 

Kari Lehtonen made 37 saves as Dallas won 2-0 against the Panthers. But the Stars lost three forwards to injuries, including scoring leader Tyler Sequin, according to an ESPN.com report.

"We're not really smiling or celebrating," Lehtonen said. "Nobody is like we usually are after a win like this."

Seguin, who has 29 goals and 59 points, was helped off the ice after being checked in the lower leg by defenseman Dmitry Kulikov in the third period. Patrick Eaves followed Seguin to the locker room 51 seconds later after teammate John Klingberg's wrist shot hit Eaves in the head.

Ales Hemsky left in the first period with a lower-body injury.

A new concussion lawsuit has been filed against the National Hockey League.

A suit with 29 plaintiffs, including former NHL players Butch Goring and Manny Legace, was filed in Minnesota District Court on Monday.

The news was first reported by The Hockey News.

Rangers goaltender Henrik Lundqvist expressed hope he would return from a throat-area injury before the start of the playoffs.

He called the problem a "blood vessel injury" that will be re-evaluated in two to three weeks.

"You can't take a risk on this," Lundqvist said Sunday. "I have to listen to the doctors. I feel great walking around but I don't want to push this injury."

Rangers goaltender Henrik Lundqvist will be out of action for at least three weeks, the result of a vascular injury suffered when he was struck in the neck by a puck last weekend.

The Rangers made the announcement Friday.

Predators goaltender Pekka Rinne has been cleared to return from a knee injury that kept him out the past three weeks, and he will start Thursday night against the Ducks, according to an ESPN.com report on Wednesday.