In a bowl, combine cooked chicken, crispy bacon, ranch dressing, mozzarella, cheddar, and seasonings until well mixed.
Roll pizza dough into even circles on a lightly floured surface, keeping edges slightly thicker.
Spoon filling onto one half of each dough circle, leaving space at the edges. Fold over and seal tightly with a fork.
Place calzones on a lined baking sheet, brush with beaten egg or butter, and bake at 400°F (200°C) until golden.
Cool for 5 minutes, then serve warm with ranch or marinara for dipping.