Brown chicken 4 minutes on each side in hot oil in a large skillet. Remove from heat and place in a slow cooker.
Combine ketchup and remaining ingredients; pour over chicken.
Cover and cook on HIGH 1 hour. Reduce heat to LOW and cook 5 to 6 hours. Remove chicken from sauce; shred chicken. Stir shredded chicken into sauce.
This is great, but a little sweet. Next time trade some of the brown sugar for molasses.