Kulich sustained a lower-body injury in Monday's 4-3 shootout win over the Capitals, Heather Engel of NHL.com reports.
Kulich recorded one shot, one hit and two PIM in 5:18 of ice time before exiting. Head coach Lindy Ruff said that the 20-year-old will be evaluated Tuesday. If Kulich and Beck Malenstyn (illness) aren't ready for Thursday's road game in Ottawa, the Sabres would need to either call up a forward from AHL Rochester or be forced to roll with 11 forwards and seven defensemen. Kulich has produced seven goals and nine points through 31 appearances this season.