If beef roast comes in netting or is tied, do not remove. Spray 12-inch skillet with cooking spray; heat over medium-hight heat. Cook beef in skillet about 5 minutes, turning occasionally, until brown on all sides. Sprinkle with herbs, salt and pepper.
In 4- to 5-quart slow cooker, place garlic. Place beef on garlic. Pour vinegar over beef.
Cover and cook on Low heat setting 6 to 8 hours. Remove netting or strings from beef.