The 25-year-old Czech became Arizona's No. 1 goalie this season after the team traded away Darcy Kuemper and Antti Raanta.
As part of the deal, the Senators will retain 44.5 per cent of Paul's remaining salary for the 2021-22 season.
The Maple Leafs acquired the veteran defenceman and Toronto native along with centre Colin Blackwell from the Seattle Kraken.
The Boston Bruins agreed to an eight-year, $52 million contract extension with defenseman Hampus Lindholm.
After 1,000 games and a reign as the longest-serving team captain in Flyers history, Giroux is off to Florida.
The Boston Bruins strengthened their blue line as they make a push for the playoffs.
The new deal will pay the 28-year-old Hertl $65.1 million over eight years at an average of more than $8 million per season.
There’s no timetable yet for Landeskog's return.
The 37-year-old Pavelski leads the Stars in assists (37) and points (59).
The loss of their top defender comes with the Stars moving up in the standings as they chase a wild-card spot in the Western Conference playoffs.
The seven-time All-Star was on the ice for the New York Islanders for the opening faceoff against San Jose for his 1,652nd regular-season game.
The 27-year-old Khaira had three goals and no assists in 27 games in his first season with the Blackhawks.
Couturier was the Flyers' top line center but had missed the last 17 games with the injury.
The winningest goaltender in Boston Bruins history is calling it a career.
The 24-year-old Greenway has four goals, nine assists and a career-high plus-17 rating in 33 games for the Wild this season.
The team said Tuesday that Karlsson is expected to be reevaluated in mid-March.
The 27-year-old Blueger has eight goals and nine assists in 40 games this season.
The Boston Bruins have signed Tuukka Rask, bringing back the winningest goalie in franchise history after he recovered from offseason surgery.
The 29-year-old Merrill has tied his career high with three goals to go with eight assists, a plus-8 rating and 51 blocked shots in 33 games this season,
The NHLPA issued a statement on Twitter saying the union also “intends to challenge any such action by filing a grievance.”