In a small saucepan, add BBQ sauce, soy sauce, garlic powder, ground ginger, Chinese five spice, ground cloves and sriracha. Mix to combine and set aside.
Next, add the chicken to the ziplock bag and swish the bag around so that the sauce coats all of the drumsticks. Marinate in the refrigerator for at least 30 minutes or up to 24 hours (return to room temperature before baking).
While the chicken is marinating, reduce the 2/3 cup of sauce over medium low heat for 10-15 minutes. The sauce will thicken as it reduces and will continue to thicken as it cools.
Place the marinated chicken on the tray and bake for 20 minutes. After 20 minutes has passed, remove the drumsticks from the oven and baste with the reduced marinade. Bake for an additional 10 minutes or until a thermometer reads 165 degrees F.