Patrick, who missed significant time in his career with concussions is likely to be evaluated again today, but this could be a significant blow to his career. This hit is surprising considering MacKinnon just returned from a concussion of his own.
MacKinnon was only issued a 2 minute penalty on the play, but due to the nature of the hit and circumstances (Patrick wasn't in possession of the puck/point of contact) he could be hearing from the NHL Department of Player Safety.