Last year Bryce Harper had two seasons: the amazing one before he ran into a wall and was knocked senseless and the not-so-amazing one afterwards. So seeing this in the second inning of the first game of the season is about as scary as it gets for the Nats:
This is the play on which it happened. Eric Young, Jr.'s shin just smacked him on the side of his head as Harper went in to break up the double play.
He got up and came back out to play the field in the bottom of the inning, but it’s definitely worth watching and worrying about him.