A big name defenseman and a top line center were declared out for the season on Thursday.
Ottawa Senators defenseman Erik Karlsson is likely out for the rest of the season after surgery to repair his left Achilles tendon, general manager Bryan Murray said.
Karlsson, 22, suffered a 70-percent tear after being sliced by the skate of Pittsburgh Penguins' left wing Matt Cooke, while they scrapped for the puck along the boards late in the second period.
Cook's skate blade landed above the top of Karlsson's boot.
The Senators will have to get by without the reigning Norris Trophy winner for at least three months. The team is already without forward Jason Spezza, who is out after having back surgery for a herniated disc.
Meanwhile, Center Manny Malhotra was placed on injured reserve and will miss the rest of the season, the Vancouver Canucks announced.
The Canucks did not give a reason for Malhotra, 32, getting scratched for the season. He was hit in the left eye with a puck during a March 2011 game, though he returned in time for the Stanley Cup Finals and then played 78 games during the 2011-12 season.
---The Canadiens and Lightning swapped goaltenders, with Dustin Tokarski coming to Montreal and Cedrick Desjardins heading to Tampa Bay, Canadiens general manager Marc Bergevin announced.
Tokarski, 23, played 33 games with the Syracuse Crunch (AHL) since the start of the 2012-13 season, and posted a 2.46 goals against average and .900 save percentage. The Saskatchewan-native had been with the Tampa Bay organization since being drafted in the fifth round in the 2008 NHL Entry Draft. He has played seven games at the NHL level.
Desjardins had been with the Canadiens organization from 2006-10 before returning to Montreal on July 1, 2012.
---NHL teams implemented a larger ticket percentage increase than the NFL and NBA for the second straight season, according to an annual study by Team Marketing Report, a sports marketing research firm.
Following a four-month lockout, the NHL began play in January and season-ticket prices rose 5.7 percent, according to the Team Marketing Report Fan Cost Index. The average season ticket for non-premium seats is $61.01.
The NBA's average ticket increased 3.5 percent to $50.99 and the NFL's rose 2.5 percent to $78.38. Last season's average MLB ticket remained even at $26.98.