Heponiemi was recalled from AHL Charlotte on Monday.
Hepomiemi's promotion likely means that neither Aleksander Barkov (knee) nor Anthony Duclair (lower body) will be ready to play against Washington on Tuesday, though fantasy players will want to await official confirmation from the team. Even without those two players, Heponiemi is unlikely to crack the lineup in favor of Ryan Lomberg or Maxim Mamin.