Mantha (throat) was placed on long-term injured reserve by the Devils on Wednesday, retroactive to Nov. 7.
Mantha took a high stick to the throat during Saturday's overtime win over the Islanders, and he's facing a multi-week absence after landing on long-term injured reserve. Lenni Hameenaho and Stefan Noesen were recalled from AHL Utica on Wednesday to provide additional depth for the Devils while Mantha is sidelined.