The thing with sports fights is they're typically prompted by something most responsible adults would consider petty or childish. This is especially true in baseball, where beefs between players and teams can outlast the postseason, the offseason and even cross over into the new year.
In 2016, Rangers reliever Matt Bush plunked Blue Jays slugger Jose Bautista in the ribs with a 98 mph fastball as retribution for his now-iconic bat flip against Texas the year before. Bautista, in turn, slid hard into second base to break up a throw by Rougned Odor, who, in turn, socked the Toronto outfielder in the face.