Preheat your oven to 375°F (190°C). Line a large baking sheet with parchment paper. In a skillet over medium-high heat, cook the sausage, breaking it apart with a spoon, until no longer pink. Drain off the grease and set aside.
Unroll the pizza dough onto the prepared baking sheet and gently press it into a rectangle.
In a small bowl, mix the softened cream cheese with 1/2 teaspoon of garlic powder, the onion powder, and black pepper. Spread this mixture evenly over the pizza dough, leaving a 1-inch border around the edges.
Sprinkle the cooked sausage over the cream cheese layer, followed by the shredded mozzarella cheese.
Starting from one of the long sides, carefully roll the dough into a tight log. Pinch the seam to seal it, then place the roll seam-side down on the baking sheet.
In a small bowl, stir together the melted butter, the remaining 1/2 teaspoon of garlic powder, and the dried parsley. Brush this mixture over the top and sides of the loaf.
Bake for 25 to 30 minutes, until the crust is golden brown. A food thermometer inserted into the center should read at least 160°F (71°C).
Let the sausage bread rest on the baking sheet for 10 minutes before slicing and serving warm with marinara sauce for dipping.