Crockpot Pulled Pork

1 pork tenderloin (1 lb)
1 cup ketchup
2 tablespoons + 1 1/2 teaspoons brown sugar
2 tablespoons + 1 1/2 teaspoons cider vinegar
1 tablespoon + 1 1/2 teaspoons Worcestershire sauce
1 tablespoon spicy brown mustard
1/4 teaspoon pepper

Cut the tenderloin in half; place in crockpot.  Whisk remaining ingredients together and pour over tenderloin.  Cook on low for 4-5 hours, until pork is cooked through and tender.

Remove pork from crockpot and use two forks to shred.  Stir sauce in crockpot, then add pork back to pot.  Toss well and allow to heat through.

Serve on hamburger buns or split kaiser rolls.