Gregor (illness) returned to practice Wednesday and wore a regular jersey, per Terry Koshan of The Toronto Sun, which suggests he should be available Thursday versus the Islanders.
Gregor (illness) won't play Tuesday against the Sharks, according to NHL.com's Dave McCarthy.
Gregor scored his third goal of the season and added the shootout winner in Tuesday's 2-1 victory over the Panthers.
Per Chris Johnston of TSN. Gregor agreed to a one-year contract worth $775,000 with Toronto on Tuesday.
Gregor signed a professional tryout agreement with Toronto on Wednesday.
San Jose did not qualify Gregor on Friday, making him an unrestricted free agent, Sheng Peng of San Jose Hockey Now reports.
Gregor supplied a goal in a 5-2 loss to Edmonton on Thursday.
Gregor secured a one-year, $950,000 contract with the Sharks on Monday, Jason Gregor of TSN1260 reports.
Gregor scored a goal on three shots and added an assist in Sunday's 5-4 overtime loss to the Wild.
Gregor recorded two assists, three shots on goal, two hits and a plus-2 rating in Saturday's 5-4 loss to the Stars.