A different way to cook a burger

I am having a cook out Monday and I am going to try something different with my burgers. I am going to slow cook them in the over for a couple of hours at 200F. I will finish them off on the grill. What I am hoping will happen is that the burgers will be a much more tender product and still acquire the grill taste.

Anybody ever done that or have a comment?

Thanks

Paul E. Smith
Knoxville, TN