Perry suffered a serious injury while participating in an impromptu basketball game at a public park. The injury occurred when Perry and Dever, on opposing teams, each tried to obtain possession of the ball when it rebounded from the backboard after a missed shot at the basket. During that encounter, Perry was struck and injured by Dever's elbow. Perry now seeks compensation from Dever. At the trial, evidence was introduced tending to prove that the game had been rough from the beginning, that elbows and knees had frequently been used to discourage interference by opposing players, and that Perry had been one of those making liberal use of such tactics. In this action, will Perry prevail? 
Yes, if Dever intended to strike Perry with his elbow.  Yes, if Dever intended to cause a harmful or offensive contact with Perry.  No, because Perry impliedly consented to rough play.  No, unless Dever intentionally used force that exceeded the players' consent. 