Preheat grill for medium heat and lightly oil the grate.
Whisk ketchup, honey, soy sauce, and garlic together in a bowl to make a glaze.
Sear the pork chops on both sides on the preheated grill. Lightly brush glaze onto each side of the chops as they cook; grill until no longer pink in the center, about 7 to 9 minutes per side. An instant-read thermometer inserted into the center should read 145 degrees F (63 degrees C).