Big concern regarding Sidney Crosby as he took Jacob Trouba's elbow to the face

During the second period of Game 5 between the Rangers and the Penguins, Pittsburgh's captain Sidney Crosby took Jacob Trouba's elbow to the face. He returned to his team bench before leaving the ice with under seven minutes to go in the period.

He didn't return for the third period. It's a situation we will have to keep an eye on. Crosby has a history of concussion since the start of his career. Let's hope he didn't suffer one...