Combine garlic, oil, oregano, paprika, salt and pepper in a food processor or blender and puree. Rub beef all over with the seasoning mix and wrap tightly with plastic wrap or place in a large sealable plastic bag. Let marinate in the refrigerator for at least 20 minutes or up to 1 day.
Preheat oven to 350°F.
Remove the beef from the plastic and place in a shallow roasting pan. Roast, uncovered, until an instant-read thermometer inserted into the center registers 145°F, 50 minutes to 1 hour. Let rest for 10 minutes, then slice and serve.