Place 1/4 cup olive oil, 1/4 cup soy sauce, 2 Tbsp brown sugar, 2 Tbsp Worcestershire sauce, 2 tsp minced garlic, and 1/2 tsp black pepper in a large zip-top bag. Seal the bag and shake or massage it until the marinade is fully combined.
Add the 4 bone-in pork chops to the bag and marinate for at least 30 minutes, or overnight if preferred.
Remove the 4 pork chops from the refrigerator 20 minutes before cooking.
Heat the grill over medium high heat to at least 400 degrees F and rub the grill gates with oil so that the pork chops do not stick while grilling.
Place the pork chops on the grill and cook for 4-5 minutes per side (based on the thickness of the pork chops) until the pork reaches an internal temperature of 145 degrees F. The pork will release naturally from the grill gates when it's ready to flip. If the pork is browning too quickly because of the sugar in the marinade, reduce the temperature on the grill.
Move the pork chops to a plate and let them rest for 3-5 minutes before serving.
Notes
Use an instant read thermometer to check the internal temperature of the pork to do when it's done cooking. Each pork chop will cook differently based on the thickness of the pork.