Slow-Cooker Pulled Beef Sandwiches

Ingredients

• 1 boneless beef chuck roast (3 pounds)
• 1-1/2 cups ketchup
• 1/4 cup packed brown sugar
• 1/4 cup barbecue sauce
• 2 tablespoons Worcestershire sauce
• 2 tablespoons Dijon mustard
• 1 teaspoon liquid smoke, optional
• 1/2 teaspoon salt
• 1/4 teaspoon garlic powder
• 1/4 teaspoon pepper
• 12 sandwich buns, split
• Optional: Sliced onions, dill pickles and pickled jalapenos