Nicklas Backstrom (hip) will miss the start of training camp and is currently listed as "week-to-week," JJ Regan of NBC Sports Washington reports.
Evander Kane will not participate at the Sharks' training camp while he is under investigation for allegations of domestic violence and sexual assault.
Logan O'Connor signed a three-year contract worth $3.15 million with the Avalanche on Wednesday, Peter Baugh of The Athletic reports.
Mark Alt will attend the Sharks' training camp on a professional tryout contract, Sheng Peng of San Jose Hockey Now reports.
Akil Thomas (undisclosed) is listed with an injury ahead of training camp.
Ryan Stanton signed a professional tryout contract with the Blackhawks on Wednesday.
According to coach Jared Bednar, Erik Johnson (upper body) is "healthy and ready to go," NHL.com's Rick Sadowski reports.
Devon Toews (undisclosed) will miss some time to start the campaign after undergoing offseason surgery, Peter Baugh of The Athletic reports.
Brady Tkachuk and the Senators have yet to come to terms on a new deal, but the two sides have continued to engage in negotiations, Bruce Garrioch of the Ottawa Sun reports.
Quinton Byfield (foot) is also reportedly dealing with an illness ahead of the start of training camp, John Hoven of SiriusXM NHL Network Radio reports.
JR Avon agreed to terms on a three-year deal with the Flyers on Wednesday.
Alex Chiasson will join Vancouver for training camp on a professional tryout, Mark Spector of Sportsnet.ca reports.
Angus Crookshank will be sidelined for 4-6 months after undergoing knee surgery, Bruce Garrioch of the Ottawa Sun reports.
Phil Kessel suffered a foot injury that will sideline him for 2-3 weeks, Arizona Coyotes Insider Craig Morgan reports.
Noah Hanifin (shoulder) is ahead of schedule in his recovery from shoulder surgery and is expected to be a full participant in Calgary's training camp, Hailey Salvian of The Athletic reports.
According to general manager Brad Treliving, Tyler Parsons was "unable to satisfy quarantine rules" and thus won't participate in the Flames' training camp, Pat Steinberg of Sportsnet 960 The Fan reports.
Sean Monahan (hip) is expected to participate in training camp following offseason surgery but may be limited in preseason contests, Hailey Salvian of The Athletic reports.
Elias Pettersson (wrist) has yet to sign a contract extension with the Canucks and won't be present for the start of Vancouver's training camp, Farhan Lalji of TSN reports.
Quinn Hughes will not be in attendance for the start of training camp while he continues to work on a new contract with Vancouver, Farhan Lalji of TSN reports.
Brandon Sutter (shoulder) is dealing with fatigue and may miss the first few days of Vancouver's training camp, Farhan Lalji of TSN reports.