Mix together chicken, cream cheese, onion or onion powder, garlic powder, salt, and 1/2 cup of chopped pecans in a medium mixing bowl.
Pour chicken cheese ball mixture into the center of a large piece of plastic wrap. Using plastic wrap, press chicken cheese ball mixture to form a ball.
Press remaining chopped pecans onto top and sides of chicken cheese ball.
Wrap with plastic wrap and store in the refrigerator for 1 hour up to 3 days before serving.