In a large mixing bowl, combine the ground beef, breadcrumbs, grated Parmesan, egg, chopped green onions, garlic powder, onion powder, salt, and pepper. Mix gently but thoroughly.
Form the mixture into small, bite-sized meatballs, about 1 to 1.5 inches in diameter.
Heat olive oil in a large skillet over medium heat. Add meatballs in a single layer and cook 4-5 minutes per side until browned and cooked through. Remove and set aside.
Bring a medium pot of salted water to a boil. Cook pasta according to package instructions until al dente. Drain and reserve 1 cup pasta water.
Reduce heat to low and warm buffalo sauce in the skillet. Return meatballs to skillet and toss to coat. Add reserved pasta water if sauce is too thick.
Add drained pasta to skillet with meatballs and sauce. Toss gently to combine and coat pasta evenly.
Sprinkle chopped fresh parsley over the top. Serve hot and enjoy.