D'Astous (lower body) was placed on injured reserve by the Lightning on Sunday, Lightning beat writer Diandra Loux reports.
D'Astous left Saturday's loss to the Blue Jackets in the third period and didn't return. He was one of three Lightning players that didn't finish the game. The 27-year-old will head to injured reserve, meaning he'll have to miss at least the next four games. He has 17 points (three goals, 14 assists) in 43 games on the season. Maxim Groshev has been recalled from the AHL and will likely draw into the lineup as a result.