San Jose Sharks center Alexander Wennberg (upper body) was downgraded to week-to-week on Thursday, Sheng Peng of San Jose Hockey Now reports. Wennberg sustained an upper-body injury in Monday's loss to Toronto and was initially deemed day-to-day. However, his injury has proved more serious than first thought. The Swedish veteran has skated as San Jose's second-line center, contributing three assists in nine games this season. In Thursday's matchup with Ottawa, Sharks head coach Ryan Warsofsky plans to use winger Collin Graf as Wennberg's replacement.

Minnesota Wild defenseman Jared Spurgeon (upper body) is set to return to the lineup on Thursday against Calgary after being activated from Injured Reserve. The Wild captain has been unavailable for four games due to an upper-body injury. After a 22-point campaign, Spurgeon hopes to regain his groove this season and has started well. Across six appearances, Spurgeon has recorded five points (one goal, four assists). Olli Maatta (upper body) is also available after missing three games, giving Minnesota back two key defensive pieces.

Los Angeles Kings center Quinton Byfield (upper body) is a game-time decision on Thursday against the New York Islanders, Zach Dooley of the Kings' official site reports. Byfield sustained an upper-body injury Tuesday night against Washington and may now miss his first game of the season. Seven games into the season, Byfield boasts only one goal and one assist. If Byfield can't play against the Islanders, Erik Haula will take over as the second-line center. Scott Laughton could also see increased usage.

Ottawa Senators goaltender Linus Ullmark (lower body) will be sidelined for 1-2 weeks. He suffered a lower-body strain in Wednesday's win over Florida, and the Senators placed Ullmark on Injured Reserve on Thursday. Ullmark has been sensational for Ottawa, posting a 7-1-0 record, a 1.33 goals-against average, and a .945 save percentage. Samuel Ersson will start Thursday's matchup with San Jose and should see additional work in the next few games. The team has recalled Jonas Johansson from the minors to serve as Ersson's backup.