Grundstrom scored a goal and added two PIM in Thursday's 4-2 loss to the Avalanche.
Grundstrom notched an assist, four shots on goal and five hits in Monday's 5-4 overtime win over the Red Wings.
Grundstrom signed a two-year, $3.6 million contract with the Sharks on Thursday.
Grundstrom was traded from LA to San Jose for Kyle Burroughs on Thursday.
Grundstrom (lower body) will be activated from long-term injured reserve ahead of his return to the lineup Monday in Game 1 against Edmonton, per Zach Dooley of the Kings' official site.
Grundstrom (lower body) is expected to be an option for Game 1 against Edmonton on Monday, Zach Dooley of the Kings' official site reports.
Grundstrom (lower body) will return from his conditioning loan with AHL Ontario and practice with LA on Saturday, John Hoven of SiriusXM NHL Network Radio reports.
Grundstrom (lower body) was assigned to AHL Ontario on a conditioning loan Saturday.
Grundstrom (lower body) practiced in a non-contact jersey Wednesday, per Eric Stephens of The Athletic.
Grundstrom (lower body) was shifted to long-term injured reserve Thursday.