Apparently Dorsett has struggled with this neck injury on and off for several years. It has gotten to the point where it requires surgery and rehab to correct. Get well soon, Derek!
Vancouver had already been playing without Dorsett for the last few games, so they will not need any extra bodies for now. However, long term this may pave the way for Jake Virtanen to step back up to the NHL. Or for Jack Skille, Joseph LaBate or Jayson Megna to take a more prominent role.