The "MDP" was available only in the Metro Cleveland area. The sandwich at the time was larger than any offering made by McDonald's. It consisted of the same ingredients as a double cheeseburger with the addition of a patty and bacon.
The "MDP" was a special sandwich offered by McDonald's, larger than any other McDonald's offerings at the time. It featured the same components of a double cheeseburger, but with an extra patty and bacon.