Preheat the oven to 375 degrees F (190 degrees C).
Toss chicken and potatoes with oil in a large bowl; transfer to a large baking dish or cookie sheet with sides. Sprinkle with rosemary, oregano, garlic powder, salt, and pepper.
Bake in the preheated oven, uncovered, for 1 hour; baste during last 15 minutes for extra crispness.
