Preheat the oven to 400°F.
Put the 12 chicken legs on a large plate or dish. Using a basting brush, lather 3 Tablespoons of extra-virgin olive oil evenly over all the drumsticks. Set aside.
In a small bowl, combine the 3 teaspoons of dried oregano, 1 teaspoon of black pepper, 1½ teaspoon of poultry seasoning, 1 teaspoon smoked paprika, ½ teaspoon cumin, and 1 teaspoon of garlic powder.
Using a spoon, sprinkle the spice rub evenly onto each chicken leg.
Using your hands or the basting brush, coat each chicken leg with the spice rub until completely covered on all sides.
Place each piece on the wire rack on top of a baking sheet. Place the baking sheet in the oven and bake for 20 minutes.
Remove the baking sheet from the oven and using tongs, turn the chicken legs.
Increase the heat to 450°F and cook the chicken legs for 15 more minutes or until the internal temperature reaches 165°F.
Serve immediately.