Mix beer, ketchup and brown sugar. Sprinkle pork chops with salt and pepper., In a large skillet, heat oil over medium heat; brown chops on both sides. Add beer mixture to pan; bring to a boil. Reduce heat; simmer, uncovered, until a thermometer inserted in pork reads 145°, 1-2 minutes. Remove chops from pan; keep warm., Return sauce to a boil; cook and stir until slightly thickened. Serve over pork.