Newcastle have not yet decided whether to appeal against the decision to send off Zurab Khizanishvili.
The Georgian defender was dismissed by referee Darren Deadman five minutes from the end of Saturday's 2-1 win over Doncaster.
He was involved in a clash with Rovers striker Billy Sharp but the centre-half had seemed to be defusing the situation. However Chris Hughton is not sure whether he deserved to be given his marching orders.
Caretaker boss Hughton will review the incident before deciding whether to contest Deadman's decision.
"It's one that we'll look at and scrutinise," said Hughton. "My first reaction was that I couldn't believe it.
"It seemed to be a skirmish that will happen in every game at some stage where you won't see a red card.
"I wouldn't rule out an appeal. The correct procedure is to have a good look at it and make sure we have got all our facts right."