Necas has been designated to NHL's concussion protocols, per Cory Lavalette of the North State Journal.
EDGE Analysis
Necas was initially designated with an upper-body injury after suffering a hit in Saturday's contest but has now been diagnosed with a concussion and will undergo the NHL's concussion protocols. He had recorded four points through his five appearances prior to the game he suffered the concussion. His status will remain a day-to-day situation as he continues to recover.