Depending on your roster I would say hold it, likely you drafted him to be your WR5+. Timeline for return is around week 2. If no other gem end's up within reach through ww, you should keep it. After all, you've drafted him for a reason. On JJAW and Hightower topic: both are too risky at this point in time (WEEK 0) and there are better lotto tickets off waivers.