Marian Hossa revealed after Monday's Game 6 win that a disc in his back was pushing up against a nerve and caused one of his legs to go numb.
Luke Schenn has inked a two-year deal with the Arizona Coyotes.
Claude Giroux (hip/abdomen) has already resumed skating.
The Toronto Maple Leafs have signed Auston Matthews to a three-year, entry-level contract.
Mikhail Grigorenko has inked a one-year, $1.3 million contract with the Colorado Avalanche.
Brad Richards has announced his retirement.
Marcus Johansson has inked a three-year, $13.75 million contract with the Washington Capitals.
The Ottawa Senators have acquired Derick Brassard and a 2018 seventh round pick from the New York Rangers in exchange for Mika Zibanejad and a 2018 second round selection.
Alex Killorn has agreed to a seven-year, $31.15 million contract.
Jamie Benn has signed an eight-year, $76 million extension with the Dallas Stars.
Jaden Schwartz has signed a five-year, $26.75 million contract with the St. Louis Blues.
Jamie Benn had a core muscle injury that led to surgery.