With Scott Laughton having gone down with a lower-body injury after blocking a shot in the Toronto Maple Leafs’ 3-1 pre-season loss to the Detroit Red Wings on Thursday, David Kampf seemed in line to fill the void on the fourth line. Kampf skated on the fourth line alongside Steven Lorentz and top prospect Easton Cowan. But hours after the practice ended, the veteran forward was placed on waivers.