Place pork chops in gallon size Zip-Lock bag. In small mixing bowl, whisk togehter balsamic vinegar, olive oil, spicy brown mustard, fresh rosemary, and salt and pepper. Allow to marinade in the refrigerator for 2 hours up to 24 hours.
Preheat grill and cook pork chops on each side for 5-10 minutes each depending on the thickness of your pork chops. Cook until internal temperature reaches 140 F or higher.
You could also bake these in the oven in the winter. Preheat oven to 400 F and allow to cook for 30 minutes or until internal temperature reaches 140 F or higher. Consider checking pork chops after 20 minutes of cooking if your pork chops are thinner.