Best thing in that case would be to change the dns settings in the roku box itself
Yes, there is no way to change it on the Roku itself that is why I need to figure out a device specific setup in the router. In fact all I really need is for the mlb tv app on the roku to use the Unblock-US dns, but I will settle for the whole device if I must. Someone in here has got to be smart enough to figure this one out. I am always amazed by what you folks come up with. Thanks again!