Pulled Pork Sandwiches In A Crock Pot

3 - 4 lb. pork loin cut in chunks
1 large onion diced
1/4 cup ketchup
bottle of your favorite barbecue sauce
3 tbsp.worcestershire sauce
1/8 tsp. pepper
1/4 tsp. salt 
1/8 tsp. garlic powder

Place pork loin in crock pot and add the rest of the ingredients.  I added a little water at the beginning.  Cook on high for about 6 hours.  As it's cooking you can mix the ingredients in the crock pot.  The pork was so tender I used two forks and shredded it right in the crock pot.  You could remove it and shred it and place it back in the crock pot also.