Preheat oven to 350 degrees and lightly grease a 9x9 baking dish.
Slice dinner rolls open and place bottom halves in the baking dish.
If using prepared shredded chicken from the refrigerator, warm it up in the microwave for about 1 minute, stirring halfway through.
Add 1/2 cup of the marinara sauce to the chicken. Stir well to combine, fully coating the chicken in sauce.
Spoon equal amounts of chicken onto each dinner roll.
Spoon the remaining marinara sauce over each slider.
Top each slider with an equal amount of shredded mozzarella cheese.
Place the tops of the dinner rolls on the sliders. Brush with melted butter and sprinkle with garlic powder, onion powder, and oregano.
Cover the pan with foil and bake for 20 minutes.
Remove the foil and bake uncovered for another 5 minutes to lightly toast the sliders.
Serve hot and enjoy!