I have seen what happens when you trade your 3rd string QB (Dobbs) and only keep 2 on your roster. You watch Ben and then Mason go down and end up with a Duck starting. Unless Mason is demanding a trade there is no reason to get rid of him. If Haskins or Dobbs was still here then we would have the extra QB to throw away. In this day and age you really need a quality #3 QB on your roster.