Girgensons (lower body) has been ruled out for Thursday's game against the Jets, Benjamin Pierce of the Lightning's official site reports.
Girgensons sustained a lower-body injury during Saturday's game against the Mammoth, and he'll be unavailable for at least one additional matchup. Dominic James will likely enter the lineup against Winnipeg, especially since Brandon Hagel (undisclosed) is a game-time decision for Thursday.