No I doubt he would get any kind of damage from this or even fighting Baki. I think boredom is his number 1 killer he was eating steak in some recent chapters and looked so bored out of his mind even his eyes were crooked.His face was fine but he definitely suffered some (momentary?) brain damage XD
He's just adding more stats for his addition to Tekken. We need a few more chapters to chart his reaction time and striking force.I think itagaki is running out of ideas