Preheat the oven according to the directions on the crescent rolls.
Thaw the frozen meatballs in the microwave on the thaw setting or at 50% power.
Open the can of crescent rolls and unroll the dough. Gently pull it apart at the perforations to form eight triangles.
Use a sharp knife to cut each triangle in half.
Put a meatball in the center of each triangle of crescent roll dough and pinch the dough all around the meatball.
Place the meatball pockets 2 inches apart on a baking sheet that is lined with parchment paper or ungreased.
Bake in the oven for 9 to 12 minutes until the crescent roll dough is golden brown.
Serve warm with marinara or pizza sauce if desired. Refrigerate any leftovers.