Put a pizza stone or inverted baking sheet on the middle oven rack and preheat to 425 degrees F for 1 hour. Meanwhile, bring the pizza dough to room temperature. Sprinkle a 15-inch round pizza pan with cornmeal.
Pulse the bacon in a mini food processor until very finely chopped. Mix the ground beef, chopped bacon, parmesan, egg, breadcrumbs, milk, parsley, garlic, oregano, 1/2 teaspoon salt and a few grinds of pepper in a medium bowl with your hands until combined. Form into 1 1/2-inch meatballs (about 12); arrange on a baking sheet and bake until firm and cooked through, about 10 minutes. Set aside to cool.
Stretch the dough all the way to the edge of the pizza pan, pressing with your fingertips (lightly oil your hands if the dough is too sticky). Arrange the meatballs evenly around the edge of the dough. Sprinkle the middle with 3/4 cup mozzarella, then top with 1/2 cup sauce. Top the meatballs with the remaining 2 tablespoons sauce and 1/4 cup mozzarella.
Put the pan on the hot stone and bake until the crust is slightly puffed and golden brown, 20 to 25 minutes. Top with grated parmesan.