Don't get me wrong, like they said he needs to continuously improve on the defensive side of the ball. He does allow himself to get beat too often, especially as the game goes on and he gets tired since we tend to play he and Brown way too much.
But, its also not just Fulks. The entire team as a whole does not defend well in the half court and Brown is probably the worst of the bunch. They all have to continue getting better there and it would be nice to see Marlin get Brown out a little more to keep him fresher but I don't think that's going to happen. He had the chance last night but still played him til the final minute.