Grosenick was added to the active roster Saturday.
Grosenick has completed his quarantine and will back up Mikko Koskinen in Saturday's game versus the Maple Leafs. The 31-year-old hasn't played an NHL game since the 2014-15 season, but he's been solid in the AHL since then, including a .920 save percentage over 33 games last season. The Oilers play again Sunday against the Senators, so there's a chance he'll draw the start then.